Optocoupleurs
Produits (40)
TLP182GB-TPL.E(T - 3750Vrms AC Input Phototransistor Optocoupler | Toshiba
The Toshiba TLP182GB-TPL.E(T is a low AC-input type optocoupler consisting of a phototransistor optically coupled to two antiparallel infrared LEDs in a compact 4-pin SO6 package. The device provides 3750 Vrms minimum isolation voltage between input and output, a wide operating temperature range of -55 degC to +125 degC, and 50 mA collector current capability per the Toshiba datasheet. What is a phototransistor optocoupler? A phototransistor optocoupler (also called a photocoupler or optoisolator) is a semiconductor isolation device that transfers electrical signals between two isolated circuits using a light path. The category hierarchy is: optocoupler -> solid-state isolator -> isolation device -> semiconductor. AC-input types like the TLP182 use two antiparallel LEDs so that both halves of an AC waveform can drive the input, eliminating the need for an external rectifier bridge and simplifying AC line sensing applications. Key features include a collector-emitter voltage rating of 80 V, current transfer ratio (CTR) of 50% minimum at IF = 5 mA, VCE(sat) of 300 mV at IC = 2.4 mA / IF = 8 mA, and switching times of 2 us (ton) and 3 us (toff). The 4-lead SO6 surface-mount package supports high-density PCB assembly, and the device is supplied on tape-and-reel for automated production lines. The TLP182 architecture uses two antiparallel GaAs infrared LEDs, an optically transparent isolation gap, and a silicon NPN phototransistor. This configuration allows bidirectional AC triggering while preserving galvanic isolation, preventing ground loops and protecting downstream logic from high-voltage transients on the input side. The 3750 Vrms rating complies with IEC 60747-5-2-style reinforced isolation for industrial voltage levels. Typical applications include communication interface isolation, PLC (programmable logic controller) input modules, switching power supply feedback loops, hybrid IC signal paths, and AC line-voltage sensing. The wide temperature range makes the device suitable for industrial and automotive-grade environments requiring reliable operation across extreme conditions. When designing with this device, derate CTR for high-temperature operation (CTR drops roughly 30% from 25 degC to 100 degC) and provide a base-emitter resistor if low-dark-current operation is required. The 6-pin package only uses 4 leads, leaving pins 5 and 6 available for mechanical stability and PCB routing convenience. This page consolidates distributor stock, parametric drop-in alternatives, and practical PCB layout guidance not present in the manufacturer datasheet, helping engineers shorten component selection time.
TLP182GR - 3750Vrms AC Input Photocoupler | Toshiba SO6
The Toshiba TLP182GR is a low AC-input phototransistor optocoupler housed in a 6-pin SO6 (4-pin SO6) surface-mount package, providing 3750 Vrms of galvanic isolation between input and output. It integrates two antiparallel infrared LEDs that allow direct AC or bidirectional DC drive on the input side, simplifying logic-level interfacing without polarity constraints. The device delivers a minimum current transfer ratio (CTR) of 100% at IF=5mA, VCE=5V (GR rank), making it well-suited for digital signal isolation and slow-speed analog sampling. An optocoupler (also called optoisolator or photocoupler) is a semiconductor isolation device combining an infrared emitter LED and a photodetector inside a single hermetic package. Light, not electrical current, transmits the signal across an isolation barrier, achieving galvanic isolation rated in volts (often kVrms). Phototransistor-output optocouplers like the TLP182 sit in the hierarchy of solid-state relays -> optoisolators -> isolators -> signal-conditioning ICs. They are favored over transformer or capacitor isolation when extremely low propagation delay is not required but cost-effectiveness, bidirectional AC input, and high isolation voltage matter. Key features of the TLP182 include 3750 Vrms isolation voltage, an operating temperature range of -55C to +125C, collector-emitter voltage of 80V, and a typical propagation delay of a few microseconds. The GR rank bin guarantees CTR between 100% and 300% at IF=5mA, VCE=5V, with other ranks (GB, BL) offering different CTR windows. The SO6 footprint is industry-standard, simplifying layout on multi-channel PLCs and interface boards. The TLP182 uses a high-speed infrared GaAs LED coupled to a silicon phototransistor through a transparent dielectric isolation barrier. The antiparallel LED arrangement allows both polarities of input current to produce light, supporting AC-line or polarity-agnostic DC switching. The high CTR at low IF reduces drive-current requirements on microcontroller GPIOs. Typical applications include PLC digital input modules, AC-line detection interfaces, communication interface isolation, programmable logic controller signal isolation, and power-supply feedback loops where the primary-side error amplifier must be isolated from the secondary-side PWM controller. Its wide operating temperature also makes it attractive for industrial and factory-automation equipment. When designing with the TLP182, ensure the input current IF is kept above the CTR bin threshold (typically >=1mA to 5mA) and below the absolute maximum of 50mA. Add a base-emitter resistor across the phototransistor to improve switching speed and reduce leakage-induced false triggers, and provide adequate creepage/clearance on the PCB between primary and secondary copper pours. This page consolidates distributor pricing, parametric drop-in alternatives, and design guidance not found in a single datasheet, helping engineers evaluate sourcing options and PCB-ready substitutes for the TLP182GR.
TLP183(GB-TPL - Phototransistor Optocoupler, 3750Vrms, 6-SO | Toshiba
The Toshiba TLP183(GB-TPL is a low-input-current phototransistor optocoupler housed in a compact 4-pin SO6 surface-mount package, providing 3750 Vrms galvanic isolation between input and output. It consists of an InGaAs infrared emitting diode optically coupled to a silicon phototransistor, configured as a single-channel device with one emitter and one collector/detector pair on the secondary side. The GB CTR (Current Transfer Ratio) rank guarantees a defined transfer characteristic band, which simplifies design-in for DC input applications. A photocoupler (also called an optoisolator or opto) is a semiconductor isolation device that transfers an electrical signal between two circuits using a light-emitting element on the input side and a light-sensitive element on the output side, separated by a transparent insulating barrier. Photocouplers sit hierarchically under optoisolators -> isolation devices -> signal conditioning -> semiconductors. They are essential where safety regulations (UL, IEC 60747-5-5, VDE) require reinforced isolation between a hazardous high-voltage domain and a user-accessible low-voltage domain such as a microcontroller or logic IC. The TLP183 belongs specifically to the phototransistor-output subfamily, where the output stage is a BJT rather than a logic gate, TRIAC, or MOSFET - making it a general-purpose analog/digital signal isolator. Key specifications include: minimum 50% current transfer ratio (CTR, IF=5 mA, VCE=5 V), 80 V collector-emitter breakdown voltage (VCEO), 6 V reverse voltage on the input LED, and 50 mA forward current capability. The device supports a wide operating temperature range from -55 C to +125 C, exceeds most competitor parts that top out at -40 C, and provides 3750 Vrms isolation voltage per UL 1577 / IEC 60747-5-5 standards. Switching characteristics are specified with ton/toff on the order of a few microseconds, making it suitable for digital logic isolation, feedback paths in switching power supplies, and ground-loop isolation in industrial interfaces. From an architectural standpoint, the TLP183 is optimized for low-input-current operation: it can be driven from 1 mA to 20 mA forward current, which means a logic-level GPIO with appropriate series resistor can directly modulate the input LED. The phototransistor output allows the designer to choose pull-up voltage from VCEO down to logic levels, enabling level translation between domains running at different voltages (e.g., 3.3 V microcontroller to 5 V peripheral, or 5 V logic to 24 V PLC input). Typical applications include PLC input/output isolation, communication interface isolation (RS-232/RS-485 driver-receiver isolation, CAN bus isolation), AC adapter feedback paths, programmable controller interfaces, and I/O interface boards. The small SO6 footprint allows high-density surface-mount assembly, replacing larger DIP-package optocouplers without PCB redesign. Compared to logic-output optocouplers (such as Toshiba TLP2761 or TLP2361), the TLP183 provides a linear analog output rather than a hard-switched digital output, which is required in feedback loops and analog signal isolation. When designing with this part, size the input resistor so that IF stays between 1 mA (for low-current logic driving) and 20 mA (the absolute maximum). For a 5 V GPIO with Vf of 1.2 V, a 1.5 kOhm to 3.3 kOhm resistor yields 1.2-2.5 mA - within the GB CTR rank operating range. Add a base-emitter resistor (typically 100 kOhm to 1 MOhm) on the phototransistor to improve switching speed by reducing the Miller-effect charge storage. Provide adequate creepage and clearance per the PCB layout guideline in the manufacturer datasheet to maintain 3750 Vrms isolation in production. This page synthesizes distributor pricing, drop-in alternatives from the same Toshiba optocoupler family, and practical design notes not found in the standalone datasheet, providing a one-stop engineering reference for component selection.
TLP183(GB-TPL,E - 3750Vrms Phototransistor Optocoupler SO6 | Toshiba
The Toshiba TLP183(GB-TPL,E is a low-input-current phototransistor optocoupler housed in a compact 4-lead SO6 (SOIC-6 equivalent, 6-SOP) surface-mount package, providing 3750 Vrms of galvanic isolation between input and output. It integrates a GaAs infrared LED optically coupled to a phototransistor in a black ceramic-reinforced molding compound, and is qualified for operation across the -55°C to +125°C industrial temperature range. The GB current-transfer-ratio (CTR) rank is specified at 100% to 600% at IF=5 mA, VCE=5 V, distinguishing it from lower- and higher-rank siblings in the same family. An optocoupler (also called an optoisolator or photocoupler) is a semiconductor device that transmits electrical signals between two isolated circuits using a short optical transmission path. The phototransistor-output topology - the dominant sub-type of optocoupler - uses a silicon phototransistor as the receiving element, offering higher load-current handling than logic-output counterparts (e.g. TLP2361) and supporting AC-coupled or DC-coupled analog signal isolation. Within the broader isolation taxonomy (optical isolation -> galvanic isolation -> circuit isolation -> signal conditioning), optocouplers sit alongside digital isolators (capacitive, inductive) as a foundational circuit-protection element in PLCs, motor drivers, switch-mode power supply feedback loops, and communication-interface cards. Key differentiating specifications include 3750 Vrms minimum isolation voltage (per UL 1577), a collector-emitter voltage (VCEO) rating of 80 V, and a collector current (IC) capability of 50 mA. The CTR rank 'GB' defines the IF=5 mA current transfer ratio between 100% and 600%, distinguishing it from the GR rank (100%-300%) and BL rank (200%-600%). The device is supplied in tape-and-reel packaging (TPL suffix) with embossed taping, optimized for high-density surface-mount assembly lines. Architecturally, the TLP183 uses a GaAs infrared emitting diode (λp ≈ 940 nm) coupled through a transparent silicone optical bond to a silicon NPN phototransistor. The pair is mounted in opposing lead-frame cavities separated by a transparent insulating barrier, delivering both high common-mode transient immunity (CMTI) and creepage/clearance distances that meet 3750 Vrms reinforced-insulation requirements in most pollution-degree-2 industrial environments. Typical applications include PLC digital input modules, AC adapter feedback loops, I/O interface boards, programmable-controller signal conditioning, and office-machine interface isolation. The wide operating temperature range also supports outdoor and industrial-automation equipment. This part is the GB-rank variant; the GR, BL, and blank-rank variants of the same TLP183 family share the footprint but offer different CTR windows for different bias-point designs. When designing with the TLP183, observe the absolute-maximum IF of 50 mA through the input LED and the absolute-maximum VCEO of 80 V at the transistor output. A base-emitter resistor of approximately 1 MΩ is recommended across the B-E junction to improve high-temperature dark-current behavior, and a 100 kΩ pull-up on the collector is typical for digital-logic interfacing. This page consolidates distributor pricing, same-package drop-in equivalents such as TLP182 and TLP185, and practical PCB-layout notes not duplicated in the manufacturer datasheet.
TLP183(GB-TPL.E(T - Phototransistor Optocoupler | Toshiba
The Toshiba TLP183(GB-TPL.E(T is a low-input-current phototransistor output optocoupler featuring a GaAs infrared LED optically coupled to a phototransistor, housed in a 4-pin SO6 (mini-flat) surface mount package. It provides 3750 Vrms of galvanic isolation between input and output, a current transfer ratio (CTR) range of 100% to 600% (GB rank), and wide operating temperature support from -55 °C to +125 °C. The part is supplied on tape-and-reel (TPL) and carries the (E designation for compliance with RoHS requirements. An optocoupler (also called an opto-isolator or photocoupler) is a semiconductor device that transmits an electrical signal between two isolated circuits using a short optical transmission path through an optically transparent insulating barrier. The hierarchy is: optocoupler -> isolator -> solid-state relay family -> discrete semiconductor. Optocouplers are essential where ground loops, high-voltage transients, or safety isolation barriers must be crossed without a galvanic (conductive) path; the TLP183 family is widely used in industrial PLCs, communication interfaces, switch-mode power supply feedback loops, and I/O modules. Key features include a forward current IF of 5 mA typical (low-input drive), a collector-emitter voltage VCEO of 80 V, a current transfer ratio (CTR) of 100-600% at IF=5 mA and VCE=5 V, and a response time tr/tr of approximately 4 microseconds. The 4-pin SO6 package is roughly one-third the footprint of a DIP-4 optocoupler, making this part well-suited to high-density surface-mount designs where a smaller isolation device is required. The TLP183 employs a GaAs infrared LED (peak wavelength ~940 nm) bonded to a silicon NPN phototransistor in a reflective optical cavity. The high BVCEO rating of 80 V supports switching of higher-voltage rails than typical 30 V or 60 V optocouplers, and the low-input-current design reduces driver power consumption in MCU-driven interfaces. Typical applications include PLC input modules, communication-interface signal isolation, switch-mode power supply (SMPS) feedback paths, programmable controller digital I/O, and AC adapter ground-loop isolation. The 3750 Vrms rating satisfies most reinforced-isolation requirements for industrial low-voltage control circuits. When designing with this part, place at least 1 mm of creepage clearance around the package body to preserve the isolation rating; the SO6 outline requires it for 230 V AC mains-reinforced designs. A base-emitter resistor (~100 kΩ across B-E) on the phototransistor improves switching speed at the cost of slightly lower CTR. This page synthesizes distributor pricing, drop-in alternative cross-references, application circuits, and practical design notes that go beyond the Toshiba datasheet alone.
TLP183(GB-TPLE(T - 3750Vrms Phototransistor Optocoupler SO6 | Toshiba
The Toshiba TLP183(GB-TPLE(T is a low-input-current phototransistor optocoupler housed in the SO6 (4-pin SO6) surface-mount package, delivering 3750 Vrms isolation and a wide operating temperature range of -55 °C to +125 °C. The device pairs a GaAs infrared LED with a phototransistor detector to provide logic-level signal transfer across an reinforced galvanic isolation barrier, and is qualified to the GB current-transfer-ratio bin (CTR typically 100% minimum at IF = 5 mA, VCE = 5 V) per Toshiba binning convention. An optocoupler (also called a photocoupler or opto-isolator) is a semiconductor device that transmits electrical signals between two isolated circuits using light. The architecture is LED -> dielectric isolation barrier -> photodetector, which converts input current into infrared photons that traverse an electrically-non-conductive polymer or air gap before being re-converted to a current on the output side. This provides galvanic isolation rated in volts (here 3750 Vrms), preventing high-voltage transients, ground loops, and common-mode noise from coupling between the primary and secondary circuits. Phototransistor-output optocouplers such as the TLP183 belong to the broader isolator/solid-state-relay family, sit hierarchically under transistors and optocouplers, and are commonly used to bridge low-voltage digital logic with industrial 24 V or 230 V AC domains. Key features of the TLP183 include a collector-emitter breakdown voltage VCEO of 80 V (min), current transfer ratio (CTR) graded into GB/GR/H bins for design flexibility, an input forward current IF max of 50 mA, and a low typical forward voltage VF of approximately 1.25 V at 10 mA. The SO6 (4 effective pins) package provides a minimum creepage distance suitable for reinforced insulation in industrial control equipment, while the surface-mount form factor is significantly smaller than legacy DIP-4 optocouplers. The TLP183 architecture uses a high-efficiency GaAs infrared LED emitter optically coupled to a silicon NPN phototransistor, with the GB CTR bin targeting the 100%-to-300% range at IF = 5 mA, VCE = 5 V. This makes the part well suited for low-input-current applications where the driving side has limited source current, such as microcontroller GPIO pins or battery-management interfaces. Compared with high-speed gate-driver optocouplers, the TLP183 is optimized for slower switching speeds (typical ton/tof in the microsecond range), trading bandwidth for robust CTR over temperature. Typical applications include PLC digital input modules, communication-interface isolation, switched-mode power supply (SMPS) feedback loops, industrial sensor interfaces, and home appliance control boards. The part's wide -55 °C to +125 °C operating range and 3750 Vrms isolation rating also suit factory-automation equipment and renewable-energy inverter control sections. When designing with the TLP183, ensure that the input-side current-limiting resistor is sized for the chosen CTR bin - a CTR of 100% at IF = 5 mA means the output transistor can sink approximately 5 mA at VCE = 5 V. Always observe maximum IF (50 mA) and power dissipation limits, and add a base-emitter resistor if slow turn-off is unacceptable in the target switching frequency. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the Toshiba datasheet, sourced from DigiKey, Mouser and TTI as of 2026-10-11.
TLP183(GR) - 3750Vrms Phototransistor Optocoupler, SO6 | Toshiba
The Toshiba TLP183(GR) is a 4-pin SO6-package phototransistor optocoupler that delivers 3750 Vrms isolation, 50% minimum current transfer ratio (CTR) at IF=0.5 mA, and an 80 V minimum collector-emitter breakdown voltage for DC input / transistor output isolation. It operates across -55C to +125C with a GaAs infrared LED optically coupled to a silicon phototransistor, packaged in a compact surface-mount SO6 outline. A phototransistor optocoupler (also called a photocoupler or optoisolator) is a semiconductor isolation component that transfers electrical signals between two circuits using a light path, providing galvanic isolation while allowing signal or low-power control coupling. Within the broader hierarchy, it belongs to: optocoupler -> isolator -> signal conditioning component -> discrete semiconductor, commonly classified under isolators/solid-state relays. Phototransistor output types are the workhorse of low-speed digital isolation in industrial, PLC, and power-supply feedback paths. Key features include 3750 Vrms minimum isolation voltage, 50% minimum CTR at IF=0.5 mA / VCE=5 V (GR bin grading), 80 V minimum VCEO, 6 V minimum VECO, 50 mA collector current capability, and 4 us typical switching speed. The SO6 footprint is significantly smaller than legacy DIP optocouplers, enabling high-density surface-mount designs on programmable controller and SMPS boards. Internally, the TLP183(GR) uses a GaAs infrared LED die facing a silicon NPN phototransistor die across an optically transparent isolation barrier. The GR CTR bin narrows the transfer-ratio window to 100-300% at IF=5 mA, simplifying design-in when a known gain band is required versus the broader TLP183 base spec. Typical applications include programmable logic controller (PLC) digital input isolation, switching power supply feedback loops, communication interface line receivers, and any high-density industrial control board needing logic-level signal isolation across a 3750 Vrms isolation barrier. When designing with this part, observe the IF=0.5 mA low-input drive condition that defines the minimum CTR - derate IF to keep the LED within its absolute maximum ratings, and provide a 0.1 uF bypass cap across the output collector supply when used in noisy industrial environments. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a single reference for sourcing and substituting the TLP183(GR) in new or legacy designs.
TLP183(GRH-TPLE - Phototransistor Optocoupler 3750Vrms SO6 | Toshiba
The Toshiba TLP183(GRH-TPLE is a low-input type phototransistor optocoupler in a 6-pin SO6 (SOIC-6 narrow body) surface-mount package, integrating an infrared LED optically coupled to a silicon phototransistor. Key parameters include a minimum collector-emitter voltage of 80 V, current transfer ratio (CTR) of 50% minimum at IF = 0.5 mA and VCE = 5 V, and isolation voltage of 3750 Vrms. The device operates over a wide temperature range of -55 °C to +125 °C. A phototransistor optocoupler is a type of optoisolator (also called photocoupler) that transfers electrical signals between two isolated circuits using light. The device consists of an infrared LED on the input side and a phototransistor on the output side, separated by a transparent dielectric barrier that provides galvanic isolation. This places the part in the broader hierarchy of optoisolator -> isolator -> interface IC -> semiconductor, where the SO6 narrow-body package family enables high-density surface-mount designs typical in industrial control and communication interface applications. Key features include a low-input current requirement of just 0.5 mA IF for the minimum CTR condition, making this part a low-input type suitable for direct connection to low-power logic or microcontroller outputs. The 3750 Vrms isolation withstand voltage meets common safety standards for reinforced isolation in industrial systems, and the 80 V VCEO rating supports higher-voltage analog and digital signal chains. The TLP183(GRH-TPLE uses a 4-pin SO6 footprint (also called SOIC-6 narrow body) that is the smallest available in the Toshiba TLP182/TLP183 series. The infrared LED is constructed using GaAs (gallium arsenide) technology, while the output phototransistor uses a standard silicon NPN process, providing proven reliability across millions of operating cycles typical of programmable logic controllers and communication interface applications. Typical applications include PLC input/output isolation, communication interface line drivers/receivers, power supply feedback loops requiring primary-to-secondary isolation, and digital logic isolation between mixed-voltage domains. Its compact SO6 footprint makes it suitable for high-density surface mounting. When designing with this device, ensure the input current IF is set within the recommended operating range (typically 0.5 mA to 25 mA) to guarantee the specified CTR. The output phototransistor requires a pull-up resistor on the collector; choose the value based on the desired switching speed and load voltage. This page synthesizes distributor pricing, same-package alternatives (TLP183 family variants), and practical design notes not found in the standalone manufacturer datasheet.
TLP183(TPL - 3750Vrms SO6 Phototransistor Optocoupler | Toshiba
The Toshiba TLP183(TPL is a low-input-current phototransistor optocoupler housed in the very small and thin SO6 (4-pin SO6 outline) surface-mount package. It integrates a GaAs infrared LED on the input side and an NPN silicon phototransistor on the output side, providing a guaranteed isolation voltage of 3750 Vrms and a wide operating temperature range of -55 C to +125 C. The TLP183 series is part of Toshiba's low-input-type coupler family, optimized for digital logic interfacing, programmable logic controllers, and power-supply feedback loops. A phototransistor optocoupler (also called a photocoupler or opto-isolator) is a semiconductor device that transfers electrical signals between two isolated circuits using a light beam inside a sealed package. The input LED converts an electrical current into infrared light, and the output phototransistor converts the light back into a current proportional to the received optical flux. Because there is no galvanic connection between input and output, the device provides galvanic isolation - the foundation of safety in PLC I/O modules, switching power supplies, industrial communication interfaces, and any application where high-voltage transients on one side must not reach sensitive low-voltage logic on the other side. Within the broader component taxonomy, phototransistor optocouplers sit under: optoisolator -> isolator -> solid-state relay precursor -> interface IC. The TLP183 distinguishes itself with a 3750 Vrms isolation voltage (per UL1577 / VDE 0884 expectations typical for the SO6 family), a current transfer ratio (CTR) of 50% minimum at IF = 5 mA, VCEO = 80 V collector-emitter breakdown, and a response time of approximately 4 us (ton/toff). The SO6 package is roughly one-third the footprint of a DIP-4 optocoupler, enabling reflow-compatible surface mounting at high density. Internally, the LED die emits at a peak wavelength near 940 nm, matched to the silicon phototransistor's peak responsivity band. The base of the phototransistor is typically pinned out internally to a no-connect or brought out depending on variant; TLP183 has the base NC by design, simplifying application circuits. CTR binning options (BL / GR / GB / Y / etc.) allow the designer to select the current transfer range that matches their biasing and switching-speed requirements. Typical applications include PLC digital input modules (24V signal isolation to 3.3V/5V logic), switching-mode power supply (SMPS) primary-to-secondary feedback (TL431-style isolation paths), communication interface isolation (RS-232/RS-485 line-side isolation), IGBT/MOSFET gate-drive signal isolation in motor drives, and AC-line zero-cross detection. When designing with the TLP183, ensure the LED forward current (IF) is biased within the 1-20 mA recommended range for stable CTR; do not exceed IF = 50 mA. A 10 kohm pull-up on the collector with a 5V logic rail typically works for 5V digital interfaces; for 3.3V logic, verify the dark-current and CTR minimums at your operating temperature. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes not consolidated on the manufacturer product page.
TLP250(TP1,F) - 1.5A Isolated Gate Driver Optocoupler | Toshiba
The Toshiba TLP250(TP1,F) is an 8-pin DIP optocoupler gate driver that combines an infrared LED input with an integrated photo-IC output stage, delivering 1.5A peak output current and 2500Vrms of galvanic isolation in a through-hole PDIP-8 package. Designed specifically for driving the gates of power MOSFETs and IGBTs in switching power converters, the device features a totem-pole CMOS output capable of sinking and sourcing up to 1.5A to charge and discharge large gate capacitances quickly. An optocoupler (also called an opto-isolator) is a semiconductor device that transmits electrical signals between two circuits using a short optical path while providing complete electrical isolation. Gate-driver optocouplers such as the TLP250 sit within the broader hierarchy of isolators (optical -> magnetic -> capacitive), which itself belongs to the power-management semiconductor category. They are essential whenever a low-voltage controller must command a high-voltage power stage without any galvanic path between them, ensuring safety and preventing ground loops. Key features of the TLP250(TP1,F) include a propagation delay of approximately 0.5 us, a common-mode transient immunity (CMTI) suitable for fast switching edges, and a wide operating temperature range that supports industrial environments. Internally the device uses a GaAlAs infrared LED coupled to a high-speed photo-diode receiver followed by a driver stage, allowing it to operate from a wide supply range. The (TP1,F) suffix denotes tape-and-reel packaging with the standard lead-free, RoHS-compliant termination finish. Typical applications for the TLP250(TP1,F) include isolated gate drivers for IGBT modules in motor-control inverters, primary-side drivers for half-bridge and full-bridge switch-mode power supplies, solar inverters, induction-heating inverters, and any industrial application that requires reinforced isolation between the logic-level control side and the high-voltage power side. Its 1.5A peak output capability allows it to drive IGBTs rated up to several hundred amperes without an external buffer stage. Engineers commonly pair it with the ACPL-P343 or HCPL-3120 when a closer pin-compatible alternative is required. When designing with the TLP250, observe the bypass-capacitor recommendations in the manufacturer datasheet: a 0.1 uF ceramic capacitor placed as close as possible to pins 8 and 5 (VCC and GND) is required for stable output switching, and an input-side current-limiting resistor must be chosen so that the LED forward current lies within the recommended 7-10 mA range. Designers should also note that the TLP250(TP1,F) has reached end-of-life status; the Toshiba TLP250H(TP1,F) and Broadcom HCPL-3120-500E are the closest drop-in cross-references available today. This page synthesizes distributor pricing, lifecycle status, drop-in alternatives, and practical design considerations that are not consolidated on the manufacturer datasheet alone, enabling engineers to compare, source, and design confidently around this established gate-driver optocoupler.
TLP293-4 - 4-Ch 3750Vrms Transistor Optocoupler SO16 | Toshiba
The Toshiba TLP293-4 is a quad-channel phototransistor optocoupler featuring four independent InGaAs infrared LEDs optically coupled to four phototransistors in a compact SO16 surface-mount package, with 3750 Vrms isolation voltage and a wide operating temperature range of -55C to +125C. The device delivers a minimum Current Transfer Ratio (CTR) of 50% at IF=5 mA and VCE=5 V, typical response time tr/tf of 3 us, and isolation voltage rated at 3750 Vrms per UL 1577-equivalent testing. An optocoupler (also called optoisolator or photocoupler) is a semiconductor isolation device that transmits electrical signals between two isolated circuits using a light path. Internally, an input infrared LED converts the input current into modulated light; the receiving-side phototransistor converts that light back into a current. This optical galvanic isolation - rated at 3750 Vrms for the TLP293-4 - allows safe interfacing between high-voltage and low-voltage domains, eliminating ground loops and protecting low-voltage microcontrollers from transient voltage spikes. Optocouplers occupy the broader category hierarchy of isolator -> signal isolator -> digital isolator alternative (optical) -> semiconductor isolation device. Key features of the TLP293-4 include 4 independent channels in one SO16 package, 3750 Vrms isolation, -55C to +125C operating range, CTR of 50% minimum (GB rank), collector-emitter voltage VCEO of 80 V, and forward current IF up to 50 mA. The SO16 package provides 2.54 mm pin pitch and is compatible with high-density PCB layouts used in PLC and I/O interface boards. The TLP293-4 uses Toshiba's InGaAs infrared LED emitter and silicon phototransistor detector process. The high VCEO of 80 V enables the output stage to switch 24 V logic-level signals directly, simplifying interface to industrial PLC backplanes. Each channel's base pin is left unconnected internally, reducing parasitic coupling and improving common-mode transient immunity. Typical applications include programmable logic controller (PLC) input/output isolation, communication interface line receivers, switching power supply feedback loops, and industrial 24 V digital signal isolation. The SO16 footprint and 3750 Vrms rating make the TLP293-4 especially well-suited for multi-channel industrial modules where PCB real estate is at a premium. When designing with the TLP293-4, observe the CTR derating with temperature and forward current. Provide input current-limiting resistors sized for the desired IF (typically 5-20 mA), and add a pull-up resistor at the collector output. Ensure the supply decoupling capacitor is placed close to the VCC pin of the receiver circuit. This page synthesizes distributor pricing from DigiKey, Mouser, Arrow, and LCSC, real-time stock signals, 4-channel photocoupler drop-in alternatives, and practical PLC interface design notes not consolidated on the manufacturer datasheet.
TLP3083F - Zero-Cross Photo Triac 800V 5kVrms | Toshiba
The Toshiba TLP3083F is a zero-crossing phototriac optocoupler housed in a 6-pin DIP6 (F-type wide-creepage) package, integrating a GaAs infrared LED optically coupled to a photo-triac. The TLP3083F delivers a peak off-state repetitive voltage (VDRM) of 800 V and an isolation voltage of 5000 Vrms, while featuring a zero-voltage-crossing (ZVC) detector that eliminates EMI by switching the triac only near the AC mains zero crossing. The 6-DIP F-type wide-creepage footprint provides reinforced insulation thickness of 0.4 mm minimum, allowing designers to meet international safety standards on a single package outline. A phototriac optocoupler (also written phototriac coupler or zero-cross triac driver) is a type of solid-state relay (SSR) that combines an input-side infrared LED with an output-side photosensitive triac. The LED electrically isolates the low-voltage control circuit from the AC mains while transmitting a switching signal through an optical path. Compared with random-phase triac drivers, zero-crossing variants such as the TLP3083F substantially reduce electromagnetic interference and inrush current, making them ideal for resistive AC loads. The TLP3083F sits within the broader hierarchy of isolators > solid-state relays > optocouplers > phototriacs > semiconductor devices. Key features include a peak off-state voltage of 800 V (VDRM), an on-state RMS current rating that supports typical SSR output stages, a trigger LED forward current of approximately 10 mA, and a halogen-free DIP6 package option. The zero-crossing detection circuit prevents the output triac from firing while the line voltage is non-zero, which suppresses RFI spikes and protects downstream loads. Reinforced 0.4 mm insulation thickness ensures compliance with IEC 60747-5-2 reinforced-insulation creepage requirements when proper PCB clearance is maintained. Typical applications include solid-state relay (SSR) output stages, AC triac drivers for home appliances such as washing machines and air conditioners, office equipment switching, and industrial temperature controllers. Designers should observe the published trigger current limits and provide adequate PCB creepage distances to maintain the rated 5000 Vrms isolation. This page synthesizes distributor pricing, drop-in alternatives, and design notes that go beyond the manufacturer datasheet.
TLP590B - Photovoltaic Optocoupler, 7V/12µA, 2500Vrms, DIP-6
The Toshiba TLP590B is a photovoltaic-output optocoupler consisting of an aluminum gallium arsenide (AlGaAs) infrared emitting diode optically coupled to a photo-diode array, housed in a six-lead plastic DIP package. The TLP590B delivers an open-circuit output voltage VOC of 7V and a short-circuit current ISC of 12 µA, with a 2500 Vrms isolation voltage rating, making it well suited as a solid-state replacement for mechanical relays in low-power switching applications. What is a photovoltaic optocoupler? It is a type of optoisolator whose output stage is a series-connected photodiode array that generates a small DC voltage when the input LED is forward-biased. Unlike transistor-output optocouplers that require an external supply, photovoltaic couplers act as optically-driven DC voltage sources, sitting in the hierarchy: optoisolator > solid-state relay > photocoupler > photovoltaic coupler > signal isolation device. Key features of the TLP590B include a high open-circuit voltage that eliminates the need for separate driver ICs in low-power MOSFET gate drive circuits, an AlGaAs LED emitter for stable optical output, and a 6-DIP through-hole package (5 active leads, 1 cut) compatible with standard PCB footprints. The device supports MOS gate driver applications, programmable controllers, and telecommunication line interface circuits. Technically, the TLP590B relies on series-connected photodiodes that multiply the single-junction photovoltaic voltage (≈0.6V) to deliver 7V at the output terminals. The 12 µA short-circuit current capability is sufficient to directly drive small-signal MOSFET gates or to feed a discrete MOSFET gate-charge pump circuit without an auxiliary bias supply, which simplifies isolated DC-DC converter designs. Typical applications include MOSFET gate drivers in solid-state relays, programmable logic controller (PLC) input isolation, telecommunication line interface cards, and battery management systems (BMS) where the photocoupler provides reinforced isolation between high-voltage battery stacks and low-voltage monitoring MCUs. When designing with the TLP590B, ensure the LED forward current is set within the recommended operating range (typically IF = 10-20 mA) to achieve the rated VOC and ISC. For higher gate-drive currents, a buffer MOSFET is required since the 12 µA output is intended only for high-impedance gates. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on individual distributor listings, including verified same-brand Toshiba photovoltaic optocouplers in the same DIP-6 footprint for direct PCB-level substitution.
TLP590B(C.F) - 7V/12uA Photovoltaic Optocoupler, 6-DIP | Toshiba
The Toshiba TLP590B(C,F) is a photovoltaic-output optocoupler that integrates an infrared-emitting diode (GaAlAs IRED) optically coupled to a series-connected photo-diode array in a 6-lead plastic DIP package (5 active pins, 1 cut). It delivers an open-circuit output voltage VOC of 7 V and a short-circuit current ISC of 12 uA, providing an isolated, fully floating micro-power source suitable for driving MOSFET gates, IGBTs, and other semiconductor inputs without a secondary power supply. A photovoltaic optocoupler is a special class of optoisolator whose output is not a transistor but an optically-generated photovoltaic voltage source. Internally, multiple photodiodes are stacked in series to multiply the per-junction voltage produced by incoming infrared photons, producing an open-circuit voltage that can reach several volts. The TLP590B belongs to the photodiode-output optocoupler family (optical isolator > photocoupler > photovoltaic isolator > solid-state relay driver), positioned within Toshiba's broad optocoupler portfolio alongside transistor-output (TLP181) and Triac-output (TLP3051) parts. Its hallmark is that no external DC bias is required at the isolated side: light alone produces usable output voltage. Key specifications include a 2500 Vrms isolation voltage (1 minute, 60 Hz, per IEC 60747-5-5-style test), a forward current IF of up to 20 mA, an operating temperature range of -40C to +85C, and a 6-DIP through-hole package with 5 functional leads. The series-connected photodiode architecture gives 7 V VOC at IF=10 mA, sufficient to enhancement-mode a standard 4 Vth MOSFET gate in many bootstrap applications. Internal optical-coupling distance provides reinforced insulation suitable for power-supply feedback, battery management isolation, and industrial control interfaces. Typical applications include isolated MOSFET/IGBT gate drivers, programmable logic controller (PLC) digital input modules, telecom line-interface isolation, solid-state relay (SSR) trigger circuits, and analog signal isolation. The TLP590B is also used as a building block in isolated DC-DC converter feedback loops and battery-management system (BMS) cell-voltage telemetry, where galvanic isolation and zero quiescent current draw from the secondary side are mandatory. When designing with this part, limit continuous forward current to 20 mA for longevity and provide a series resistor from the 3.3 V or 5 V logic rail. A 0.1 uF bypass across the output is recommended when the load is highly capacitive, since the photovoltaic source has finite output impedance and can oscillate under sudden load steps. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TLP590B(CF) - 7V Photovoltaic Optocoupler, 2500Vrms | Toshiba
The Toshiba TLP590B(CF) is a photovoltaic-output optocoupler that combines an aluminum gallium arsenide (AlGaAs) infrared emitting diode with a series-connected photo-diode array in a 5-lead, 6-DIP (cut) package with 2500 Vrms isolation. Its open-circuit voltage (VOC) reaches 7 V minimum and short-circuit current (ISC) is 12 uA typical when driven at the recommended input current, enabling direct drive of MOSFET gates or solid-state relay output stages without an external bias supply. The optoisolator pathway provides reinforced galvanic isolation between low-voltage control logic and high-voltage switching domains, making the part well suited to industrial power-conversion modules. A photovoltaic optocoupler (also called a photovoltaic isolator or PV-output optocoupler) is a type of optoisolator whose output is a series-connected photodiode stack generating a small voltage when illuminated. Unlike phototransistor or phototriac optocouplers that produce a current output, a PV-output device produces a usable voltage that can float the gate of a MOSFET or IGBT. Within the broader isolator taxonomy, the TLP590B sits in the solid-state relay / gate-drive optocoupler family, alongside photorelays, gate-drive optos, and magnetic isolators - it is the simplest, lowest-cost way to bias a high-side or floating MOSFET switch. Key features include a minimum 7 V open-circuit output voltage (sufficient to turn on standard-threshold MOSFETs), 12 uA typical short-circuit current, 2500 Vrms isolation rating, and a wide operating temperature range suitable for industrial environments. The CF tape-and-reel packaging option supports high-volume automated assembly. The GaAlAs infrared emitter features a typical forward voltage of 1.25 V at 10 mA IF and a reverse breakdown of 5 V minimum, and the package is UL-recognized under file E67349 with creepage and clearance designed to meet 5 mm reinforced insulation. The internal photo-diode array uses series-connected photovoltaic cells, which produce an open-circuit voltage proportional to the number of cells stacked. Six series cells typically yield 7 V open-circuit and roughly 12 uA short-circuit under 20 mA drive current. Compared to a discrete approach with an LED and discrete booster circuit, the TLP590B integrates the PV array inside a single isolator barrier, reducing PCB area, BOM count, and design complexity for floating-switch gate-drive functions. Typical applications include solid-state relay output stages (replacing electromechanical relays in industrial automation), battery management systems (galvanic isolation for high-side N-MOSFET switches), programmable logic controller (PLC) output modules, telecommunications line drivers, and MOSFET/IGBT gate drivers for floating or high-side configurations. The photovoltaic output allows direct gate biasing without secondary supply, simplifying low-power switching. When designing with this device, ensure that the LED forward current is limited to the datasheet-recommended IF range (typically 10 to 20 mA) with an external resistor; the output can be shorted when the input is off, so no external discharge network is required for turn-off. Designers should also derate isolation voltage according to application safety standards such as IEC 60747-5-5 or UL 1577. This page synthesizes distributor pricing, package-level drop-in equivalents from the Toshiba photovoltaic-output family, and practical design guidance that consolidates the manufacturer's datasheet into an engineer-ready reference.
VOS617A-4T - 3750Vrms Phototransistor Optocoupler, SSOP-4 | Vishay
The Vishay VOS617A-4T is a phototransistor-output optocoupler housed in a 4-pin SSOP (50 mil lead pitch, mini-flat) package, providing 3750 Vrms of galvanic isolation between input and output. The device uses a GaAs infrared emitting diode optically coupled to a silicon planar phototransistor detector, with a current transfer ratio (CTR) graded from 160% to 320% at a 5 mA forward current. The -4 CTR bin is positioned in the middle of the VOS617A family range, giving designers a balanced combination of high gain and predictable switching performance. A phototransistor optocoupler is a type of optoisolator that transfers electrical signals between two circuits using a light beam inside an electrically insulating package. The internal LED emits infrared light when forward-biased, and the phototransistor on the receiving side conducts proportionally to the received light intensity. This category belongs to the broader optocoupler / opto-isolator family, which itself sits within isolator ICs and discrete optoelectronic components used for safety isolation, ground-loop elimination, and high-voltage signal interfacing in industrial, medical, and switching power supply designs. Key features include a low forward voltage of approximately 1.1 V at 10 mA, a collector-emitter voltage of 80 V, and a low coupling capacitance that preserves signal integrity in high-speed digital interfaces. The device supports an operating temperature range of -55 °C to +110 °C, enabling deployment in harsh industrial environments. With a low typical input current requirement and SSOP-4 footprint of approximately 4.4 mm x 3.85 mm, the VOS617A-4T enables compact PCB layouts where board real estate is at a premium. The architecture combines a GaAs IR emitter with a silicon planar phototransistor detector in a half-pitch mini-flat package. Compared with DIP-4 optocouplers, the SSOP-4 form factor reduces board footprint by roughly 70%, while maintaining 3750 Vrms isolation - well above the requirements of most IEC 62368-1 reinforced insulation applications. The planar phototransistor process also gives lower dark current than conventional mesa phototransistors, improving noise immunity in low-signal designs. Typical applications include digital logic interfacing between low-voltage microcontrollers and high-voltage industrial buses, isolated gate drive feedback in switch-mode power supplies, PLC input/output isolation modules, and AC line detection circuits. The wide CTR range and high isolation voltage also make it suitable for medical equipment requiring patient-applied circuit protection. When designing with this device, place a bypass capacitor in parallel with the input LED to filter high-frequency noise, and verify that the CTR derating curve over temperature is acceptable for the minimum expected gain at the lowest operating temperature of your application. Also confirm that the load resistor value does not exceed the maximum collector current rating under worst-case CTR. This page synthesizes Vishay datasheet parameters, distributor stock and pricing data, drop-in compatible alternatives, and practical design notes that extend beyond the manufacturer's datasheet presentation.