TLP293-4 - 4-Ch 3750Vrms Transistor Optocoupler SO16 | Toshiba
Référence : TLP293-4 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.18 | $118,00 |
| 500 | $0.95 | $475,00 |
| 1 000 | $0.82 | $820,00 |
| 3 000 | $0.71 | $2 130,00 |
TLP293-4 Présentation
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.
Alternatives de remplacement direct pour TLP293-4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
TLP293-4(GB-TP,E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TLP293-4(LGBTP,E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TLP293-4(V4GBTPE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TLP293-4(E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TLP293-4(TPR,E
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI8461BB-A-IS1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TLP293-4 Valeurs maximales et caractéristiques électriques
| Part Number | TLP293-4 |
| Manufacturer | Toshiba Semiconductor and Storage |
| Device Type | Optoisolator / Photocoupler (Phototransistor Output) |
| Number of Channels | 4 |
| Input Type | DC (InGaAs Infrared LED) |
| Type de sortie | Phototransistor (DC) |
| Isolation Voltage | 3750 Vrms |
| Boîtier | SO16 (SOIC-16) |
| Type de montage | Surface Mount |
| Plage de température de fonctionnement | -55C to +125C |
| Current Transfer Ratio (CTR) | 50% min at IF=5 mA, VCE=5 V (GB rank) |
| Tension collecteur-émetteur (Vceo) | 80 V |
| Forward Current (IF) max | 50 mA |
| Response Time (tr/tf) | 3 us (typical) |
| Courant de collecteur (Ic) | 50 mA max |
| Pin Pitch | 1.27 mm (SO16) |
| Statut RoHS | Compliant |
| Niveau MSL | 1 (Unlimited) |
Configuration des broches de TLP293-4
| Broche 1 | LED1 Anode — Channel 1 LED anode (input) |
| Broche 2 | LED1 Cathode — Channel 1 LED cathode (input) |
| Broche 3 | NC — Not connected (per datasheet) |
| Broche 4 | TR1 Emitter — Channel 1 phototransistor emitter (output) |
| Broche 5 | TR1 Collector — Channel 1 phototransistor collector (output) |
| Broche 6 | TR2 Collector — Channel 2 phototransistor collector (output) |
| Broche 7 | TR2 Emitter — Channel 2 phototransistor emitter (output) |
| Broche 8 | NC — Not connected (per datasheet) |
| Broche 9 | LED2 Cathode — Channel 2 LED cathode (input) |
| Broche 10 | LED2 Anode — Channel 2 LED anode (input) |
| Broche 11 | LED3 Anode — Channel 3 LED anode (input) |
| Broche 12 | LED3 Cathode — Channel 3 LED cathode (input) |
| Broche 13 | NC — Not connected (per datasheet) |
| Broche 14 | TR3 Emitter — Channel 3 phototransistor emitter (output) |
| Broche 15 | TR3 Collector — Channel 3 phototransistor collector (output) |
| Broche 16 | TR4 Collector — Channel 4 phototransistor collector (output) |
Applications typiques
TLP293-4 convient pour 6 applications: PLC Digital Input Isolation, Switching Power Supply Feedback Isolation, Communication Interface Line Receivers, Industrial Sensor Signal Isolation, Medical Equipment Patient Isolation, Solar Inverter String Monitoring.
PLC Digital Input Isolation
The TLP293-4's 4-channel SO16 footprint and 3750 Vrms isolation make it a strong fit for PLC digital input modules where 24 V field-side signals must be galvanically isolated from 3.3 V or 5 V controller logic. Each of the four channels handles one 24 V input, with the LED forward current set by an external resistor (typically 10 mA). The 80 V VCEO allows the phototransistor output to switch directly to 24 V PLC backplane logic, while the -55C to +125C operating range supports factory floor temperature extremes. Common-Mode Transient Immunity (CMTI) is sufficient for PLC scan rates below 10 kHz, and the 50% minimum CTR (GB rank) at IF=5 mA guarantees reliable switching at low IF, reducing power dissipation in high-density input cards.
Recommandé
Switching Power Supply Feedback Isolation
The TLP293-4 provides primary-to-secondary feedback isolation in switch-mode power supplies (SMPS) where the TL431 reference circuit on the secondary side drives the LED input through an opto-feedback loop. The 3750 Vrms isolation meets UL 1577 reinforced insulation requirements, while the 80 V VCEO allows direct connection to 5 V or 12 V TL431 loop drive. CTR stability over temperature (the GB rank guarantees 50% min at IF=5 mA) keeps the loop bandwidth predictable across -55C to +125C. Using one TLP293-4 enables four independent feedback or synchronization channels on a single IC, reducing PCB area in multi-output telecom DC-DC converters and industrial 24 V to 5 V/12 V/15 V modules.
Recommandé
Communication Interface Line Receivers
The TLP293-4 isolates RS-232, RS-485, or CAN bus transceiver signals in industrial communication modules. Each channel handles one direction of half-duplex communication, with the LED driven by the bus-side line and the phototransistor providing galvanically isolated output to the logic-side UART or CAN controller. The 50 mA collector current capability matches typical bus drive levels, while the 3 us response time supports baud rates up to approximately 100 kbps. The -55C to +125C operating range and 3750 Vrms isolation satisfy IEC 61800-3 industrial EMC requirements for motor drive communication ports and substation communication interfaces where ground potential differences can exceed 1000 V.
Recommandé
Industrial Sensor Signal Isolation
The TLP293-4 isolates analog and digital sensor signals in industrial measurement modules where thermocouple, RTD, strain gauge, or proximity sensor outputs must be safely interfaced to ADC channels. The 4-channel configuration allows simultaneous isolation of multiple sensor inputs, while the 80 V VCEO supports direct drive of 0-10 V or 4-20 mA process signal levels. The 50% minimum CTR at IF=5 mA ensures predictable gain calibration, and the wide -55C to +125C operating temperature is suitable for outdoor or factory-automation deployments. Each channel is DC-coupled and responds to steady-state sensor outputs, unlike pulsed optocouplers used for digital isolation only.
Recommandé
Medical Equipment Patient Isolation
The TLP293-4's 3750 Vrms isolation and -55C to +125C operating range make it a candidate for medical devices where patient-applied circuits (ECG, EEG, blood pressure monitoring) must be isolated to IEC 60601-1 patient safety standards from the operator-side electronics. The 4-channel SO16 footprint supports ECG front-end isolation in 4-lead patient monitors, with each channel isolating one electrode signal. The 50% minimum CTR at IF=5 mA provides predictable gain for the ECG amplifier chain. Note that medical applications require additional system-level qualification beyond the optocoupler datasheet rating, and the design must observe creepage and clearance distances per IEC 60601-1.
Recommandé
Solar Inverter String Monitoring
The TLP293-4 isolates high-voltage photovoltaic (PV) string monitoring signals from low-voltage microcontroller inputs in solar inverters. The 3750 Vrms isolation rating handles PV string voltages up to 1000 V DC (typical residential string), while the 4-channel SO16 footprint supports simultaneous monitoring of multiple strings on a small PCB. The -55C to +125C operating temperature accommodates outdoor rooftop inverter enclosures in full sun. The 50 mA collector current can directly drive 5 V logic-level ADC inputs after a simple pull-up resistor configuration. The high VCEO of 80 V provides additional safety margin in the event of transient overvoltage events on the PV string side.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TLP293-4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TLP293-4(GB-TP,E | TLP293-4(LGBTP,E | TLP293-4(V4GBTPE | TLP293-4(E | SI8461BB-A-IS1 |
|---|---|---|---|---|---|---|
| Package | SO16 (SOIC-16) | SO16 - same | SO16 - same | SO16 - same (V4 lead-forming) | SO16 - same | SO16 - same footprint, digital isolator |
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Toshiba | Silicon Labs |
| Channels | 4 | 4 | 4 | 4 | 4 | 6 (digital isolator) |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 2500 Vrms (digital isolator) |
| Output Type | Phototransistor | Phototransistor | Phototransistor | Phototransistor | Phototransistor | CMOS logic output |
| CTR (min) | 50% (GB rank) | 50% (GB) | 50% (GB) | 50% (GB) | standard rank (no min CTR) | N/A (digital) |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -40C to +125C |
| VCEO | 80 V | 80 V | 80 V | 80 V | 80 V | N/A (digital isolator) |
| Packaging | Tube (E) | Tape & Reel | Tape & Reel (L) | Tape & Reel (V4) | Tube | Tape & Reel |
Principaux différenciateurs
- 4 channels in a single SO16 footprint (vs TLP293 (2-channel, SO8))
- Phototransistor output (analog-capable) (vs SI8461BB-A-IS1 (digital isolator, CMOS logic))
- GB rank CTR bin sorting for production consistency (vs TLP293-4(E (standard rank, no CTR bin))
Notes de conception
CTR derates with temperature and decreasing forward current. The TLP293-4 GB rank guarantees 50% minimum CTR at IF=5 mA and VCE=5 V, but CTR at 1 mA IF and +85C may be 30-40%. For PLC input designs, always use IF in the 10-20 mA range (not below 5 mA) to maintain predictable switching. If designing for low-IF battery-powered input modules, consider the TLP293-4(V4GBTPE variant or use a buffer transistor on the output stage.
Place the TLP293-4 SO16 footprint on a clear keepout region with no copper traces or planes passing under the optocoupler body to maintain 3750 Vrms isolation creepage. Use a slot or cut-out in the PCB between input-side and output-side copper pours. Provide at least 8 mm of creepage distance on the PCB surface and 0.4 mm of internal clearance through the PCB for industrial reinforced insulation per IEC 60747-5-2.
Each LED input requires a current-limiting resistor sized for the desired IF. For a 24 V PLC input at IF=10 mA, the resistor is R = (VIN - VF) / IF = (24 V - 1.2 V) / 10 mA = 2.28 kohm; use 2.2 kohm standard value. Add a reverse-polarity protection diode if the input may be wired with reversed polarity in industrial installations. The phototransistor collector needs a pull-up resistor (typically 10 kohm to VCC) sized for the desired response time and power dissipation.
Informations de conformité
ROHS3 compliant per PartGenie listing. REACH unaffected. MSL 1 (Unlimited) per JEDEC J-STD-020. Not AEC-Q100 qualified - optocouplers for automotive applications require separate AEC-Q100 qualified part numbers. UL 1577-equivalent isolation testing performed at 3750 Vrms per Toshiba datasheet.
