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TLP281-4 Toshiba Transistor Output Optocoupler SMD SOIC 16 Package
The TLP281-4 is a compact quad-channel optocoupler designed by Toshiba, integrating four infrared LEDs and four phototransistor output stages inside a single SOIC-16 SMD package.
It provides galvanic isolation between input and output circuits, protecting sensitive electronics from high voltages, electrical noise, and ground potential differences.
With its low input current requirement, wide Current Transfer Ratio (CTR), and stable performance over temperature, the TLP281-4 is well suited for digital interfaces, microcontroller isolation, switching circuits, and general-purpose signal coupling.
Its SMD design makes it ideal for compact, high-density PCB designs used in consumer electronics and industrial control systems.
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Features:-
- Collector-Emitter Voltage : 80 V (MIN)
- Current Transfer Ratio : 50% (MIN) Rank GB : 100% (MIN)
- Isolation Voltage : 2500 Vrms (MIN)
- UL Recognized : UL1577 , File No. E67349
- BSI Approved : BS EN 60065: 2002,
- BS EN 60950-1
- 2002 Certificate No. 8143, 8144
Specification:-
| Symbol | Parameter | Rating | Units |
| IF | Forward Current | 50 | mA |
| ?IF / °C | Forward current derating | ?0.5 (Ta?25°C) | mA / °C |
| IFP | Pulse forward current | 1 | A |
| VR | Reverse voltage | 5 | V |
| Tj | Junction temperature | 125 | °C |
| VCEO | Collector-emitter voltage | 80 | V |
| VECO | Emitter-collector voltage | 7 | V |
| IC | Collector current | 50 | mA |
| PC | Collector power dissipation | 100 | mW |
| ?PC/°C | Collector power dissipation derating (Ta ? 25°C) | ?1.0 | mW / °C |
| Tj | Junction temperature | 125 | °C |
| Tstg | Storage temperature range | ?55~125 | °C |
| Topr | Operating temperature range | ?55~100 | °C |
| Tsol | Lead soldering temperature | 260 (10s) | °C |
| PT | Total package power dissipation | 170 | mW |
| ?PT / °C | Total package power dissipation derating (Ta ? 25°C) | ?1.7 | mW / °C |
| BVs | Isolation voltage | 2500(AC,1min,R.H.?60%) | Vrms |
Applications
- Multi-channel microcontroller and logic signal isolation
- Switch-mode power supply (SMPS) feedback
- Industrial control and automation equipment
- Home appliance control circuits
- AC mains monitoring and isolation
- Relay, MOSFET, and transistor driver circuits
- Sensor signal isolation
- Noise suppression in communication and interface lines
*Product image for illustration purposes only, actual product may vary.
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