TLP183(TPL - 3750Vrms SO6 Phototransistor Optocoupler | Toshiba
MPN: TLP183(TPL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.48 | $0.48 |
| 10 | $0.42 | $4.20 |
| 100 | $0.31 | $31.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
TLP183(TPL Overview
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.
Drop-in alternatives for TLP183(TPL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLP183(TPL (same form factor and footprint) — differing in Operating Temperature Range, Package, Mounting Type, RoHS Status, CTR Rank.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLP183(BL-TPL,E
✅ Drop-In📋 Reference alternative (not in catalog)
TLP183(GR-TPL,E
✅ Drop-In📋 Reference alternative (not in catalog)
TLP183(GB-TPL,E
✅ Drop-In✓ In Stock
$0.09 / Unit
View Datasheet →TLP185(GR-TPL,SE
✅ Drop-In📋 Reference alternative (not in catalog)
ILD213T
✅ Drop-In📋 Reference alternative (not in catalog)
HCPL-0701
✅ Drop-In📋 Reference alternative (not in catalog)
TLP182(GR-TPL,E
✅ Drop-In📋 Reference alternative (not in catalog)
TLP183(TPL Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 3750 Vrms |
| Output Type | NPN Phototransistor |
| Input Type | DC (GaAs Infrared LED) |
| Number of Channels | 1 |
| Package | 6-SO / SO6 (4 active pins) |
| Collector-Emitter Voltage (Vceo) | 80 V |
| Emitter-Collector Voltage (VECO) | 7 V |
| Forward Current (IF) Max | 50 mA |
| Forward Voltage (VF) Typ | 1.25 V at IF = 10 mA |
| Current Transfer Ratio (CTR) Min | 50 % at IF = 5 mA, VCE = 5 V |
| Rise/Fall Time (typ) | 4 us (ton/toff) |
| Operating Temperature Range | -55 C to +125 C |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
TLP183(TPL Pin Configuration
| Pin 1 | LED Anode — Input LED anode - bias with positive current through external resistor |
| Pin 2 | LED Cathode — Input LED cathode - connect to ground through current-limiting resistor |
| Pin 3 | NC — Not connected (mechanical pad only) |
| Pin 4 | Emitter — Phototransistor emitter - typically tied to logic GND |
| Pin 5 | Collector — Phototransistor collector - pull-up to logic supply via external resistor |
| Pin 6 | NC — Not connected (mechanical/thermal pad only) |
Typical Applications
TLP183(TPL is suitable for 7 applications: PLC Digital Input Module Isolation, Switching Power Supply (SMPS) Feedback Isolation, RS-485 / RS-232 Communication Interface Isolation, IGBT / MOSFET Gate Drive Signal Isolation, AC Line Zero-Cross Detection, Medical Equipment Patient Isolation, Battery Management System (BMS) Communication Isolation.
PLC Digital Input Module Isolation
The TLP183(TPL is the industry-standard choice for isolating 24V PLC digital inputs from 3.3V/5V logic controllers. Its 3750 Vrms isolation safely rejects the common-mode transients present on factory-floor wiring (per IEC 61131-2), while the 50% minimum CTR at IF = 5 mA cleanly interfaces with a single 24V input channel through a 4.7 kohm current-limiting resistor. The SO6 footprint saves roughly 60% board area versus DIP-4 optocouplers - critical for high-density 32- or 64-channel PLC input cards where hundreds of optos must fit on a single backplane.
Recommended
Switching Power Supply (SMPS) Feedback Isolation
In AC-DC and isolated DC-DC converters, the TLP183(TPL provides primary-to-secondary feedback isolation for TL431-style regulation loops. The 3750 Vrms rating satisfies reinforced insulation requirements for consumer and industrial power supplies up to 250Vrms working voltage, while the 80V VCEO handles the high-side collector bias typical of quasi-resonant flyback topologies. Designers use the TLP183 in combination with a TL431 reference on the secondary side, with the opto feeding back to a UC3842 or similar PWM controller on the primary.
Recommended
RS-485 / RS-232 Communication Interface Isolation
The TLP183(TPL isolates RS-485 transceiver logic from bus-side transients in industrial networking equipment. A typical circuit places the TLP183 between the MCU UART and the RS-485 driver (e.g., THVD1552DR), with the LED biased through a 470-ohm resistor at 5V. The 3750 Vrms isolation protects the MCU from ground-potential differences and ESD events on the bus. For full-duplex isolation, two TLP183 devices are used (one per direction), with the SO6 footprint allowing dense placement near the bus connector.
Recommended
IGBT / MOSFET Gate Drive Signal Isolation
Motor drives and inverter stages use the TLP183(TPL to isolate gate-drive PWM signals from low-voltage logic. While the TLP183 is not as fast as dedicated gate-drive optos (e.g., HCPL-3120), it suits low-frequency (under 50 kHz) IGBT modules in industrial motor controllers and solar inverters. The 4 us response time accommodates 10 kHz PWM updates with comfortable margin, and the 80V VCEO handles the bootstrap supply rails typical of low-side gate-drive circuits in three-phase inverters.
Recommended
AC Line Zero-Cross Detection
The TLP183(TPL provides isolated zero-cross detection for triac/SCR firing circuits in solid-state relays (SSRs) and dimmer controls. An external bridge rectifier and current-limiting resistor feed the input LED from the 120V/240V AC mains, while the output phototransistor pulls a logic-low signal into a microcontroller at each AC zero crossing. The 3750 Vrms isolation rating ensures safe separation between line voltage and the low-voltage controller. This topology is widely used in home-automation dimmers and industrial SSR banks.
Recommended
Medical Equipment Patient Isolation
In patient-monitoring equipment (per IEC 60601-1 isolation requirements), the TLP183(TPL provides basic isolation between the patient-connected sensor circuits and the mains-powered host. While reinforced isolation typically requires two optos in series or a higher-rated isolation barrier, the TLP183's 3750 Vrms is suitable for BF-type (body-floating) applied parts in low-risk monitoring such as temperature or SpO2 peripherals. The SO6 footprint supports compact wearable designs.
Recommended
Battery Management System (BMS) Communication Isolation
In multi-cell lithium battery packs, the TLP183(TPL isolates the high-voltage battery monitoring circuits (e.g., AFE for cell balancing) from the low-voltage CAN bus that leaves the pack. A typical BMS uses one TLP183 per CAN TX/RX line, with the 3750 Vrms rating providing reliable isolation across the 400V+ typical EV battery bus. The TLP183's -55 C to +125 C operating temperature range supports under-hood automotive environments, while the SO6 footprint minimizes BMS board real estate.
Recommended
Recommended Products Summary
Engineering reference data for TLP183(TPL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLP183(BL-TPL,E | TLP185(GR-TPL,SE | ILD213T | HCPL-0701 |
|---|---|---|---|---|---|
| Package | 6-SO (SO6, 4 active pins) | 6-SO (SO6, 4 active pins) - same | 6-SO (SO6, 4 active pins) - same | 6-SO (SO6, 4 active pins) - same | 6-SO (SO6, 4 active pins) - same |
| Brand | Toshiba | Toshiba | Toshiba | Vishay Intertechnology | Broadcom |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 5300 Vrms | 3750 Vrms |
| CTR (Minimum) | 50 % at IF=5 mA | 200 % (BL bin) | 100 % (GR bin) | 100 % at IF=10 mA | 25 % |
| VCEO | 80 V | 80 V | 80 V | 70 V | 24 V |
| Forward Current (IF) Max | 50 mA | 50 mA | 50 mA | 60 mA | 20 mA |
| Response Time (typ) | 4 us | 4 us | 4 us | 4 us | 20 us |
| Operating Temperature | -55 C to +125 C | -55 C to +125 C | -55 C to +125 C | -40 C to +100 C | -40 C to +85 C |
Key Differentiators
- Highest guaranteed isolation voltage in SO6 phototransistor optocouplers (vs HCPL-0701)
- Extended -55 C to +125 C industrial operating temperature range (vs ILD213T)
- Higher VCEO rating for high-side switching applications (vs HCPL-0701)
- Higher maximum forward current rating (vs HCPL-0701)
Design Notes
Bias the input LED within the recommended IF = 1-20 mA range for stable CTR. Use a 4.7 kohm resistor from a 24V PLC input, or a 470-ohm resistor from a 5V logic rail (IF ~ 8 mA). Do not exceed the absolute maximum IF = 50 mA. Add a 1N4148 reverse-bypass diode across the LED for reverse-polarity protection when the source is a DC industrial input. Place a 0.1 uF ceramic bypass capacitor close to VCC on the collector pull-up to suppress switching transients.
Estimated: at IF = 20 mA and VCE = 5V, the TLP183 dissipates approximately 100 mW - well within the SO6 thermal rating. However, when the collector saturates at low VCE, dissipation drops to under 10 mW. The SO6 package has a thermal resistance theta_JA of approximately 200 C/W, but practical dissipation is so low that no heatsinking is required. For high-density PLC cards with 64+ TLP183 devices in a confined area, ensure ambient temperature stays within the -55 C to +125 C operating envelope with adequate board airflow.
Use a guard trace or keep-out region around the SO6 package body to maintain the 3750 Vrms isolation. The minimum creepage distance for 3750 Vrms isolation in pollution degree 2 is typically 5 mm; the SO6 package provides 8 mm internal creepage, but external routing must not bridge this gap with copper. Maintain a 1.27 mm (50 mil) clearance from the input-side (pins 1-2) to the output-side (pins 4-5) copper pours on the top and inner layers. Avoid placing any signal trace under the package that crosses the isolation barrier.
The TLP183's 4 us typical response time makes it unsuitable for high-speed digital links above 100 kbps. For higher-speed interfaces, use the Toshiba TLP2768 or Broadcom HCPL-0721 (both with sub-100 ns propagation delay). When using the TLP183 for pulse-width-modulated gate drive signals, ensure the PWM frequency is below 50 kHz (i.e., period > 20 us) so the 4 us turn-off time does not distort the duty cycle. Add a 10 kohm base-to-emitter resistor if faster turn-off is required, since this discharges the phototransistor's base capacitance.
Do not assume all CTR bin codes are interchangeable - the TLP(BL ~ 200-400% CTR) and TLP(GR ~ 100-300% CTR) deliver very different collector currents at the same IF. Verify your downstream logic input thresholds accommodate the worst-case minimum CTR. Also, dark current (ICEO) at +85 C can reach 100 nA - this may falsely trigger high-impedance CMOS inputs if no pull-down is provided. Add a 100 kohm pull-down on the collector for CMOS interfaces. Finally, do not use the TLP183 for reinforced isolation in medical (IEC 60601-1) without verifying the working voltage and means of patient protection - it is rated for basic isolation only at 3750 Vrms.
Compliance Information
RoHS and REACH compliant per Toshiba product page (2026-10-11). Not AEC-Q100 qualified - for automotive optocouplers, see Toshiba TLP109 or TLP5214 series. Halogen-free status not explicitly stated in retrieved data.
