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EL817 Optocoupler IC
The EL817 is a widely used phototransistor output optocoupler that provides electrical isolation between input and output circuits.
It consists of an infrared LED that drives an NPN phototransistor housed in a compact 4-pin DIP or SMD package (depending on variant).
The EL817 is known for its stability, wide CTR options, and compatibility with both analog and digital signal isolation applications.
It is commonly used in power supplies, microcontroller interfaces, and industrial control circuits.
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Features :-
- Current transfer ratio (CTR: 50~600% at IF =5mA, VCE =5V)
- High isolation voltage between input and output (Viso=5000 V RMS)
- Creepage distance >7.62 mm
- Operating temperature up to +110°C
Specifications
| Input-Forward current | 60mA |
| Input-Reverse voltage | 6V |
| Input-Forward voltage | 1.2 – 1.4 V |
| Output-Collector-Emitter voltage | 35V |
| Output-Emitter-Collector voltage | 6V |
| Output-Collector current | 50mA |
| Operating temperature | -55 ~ +110°C |
| Storage temperature | -55 ~ +125°C |
| Total power dissipation | 200 mW |
Applications
- Microcontroller and logic signal isolation
- Switch-mode power supply (SMPS) feedback
- AC mains detection and isolation
- Relay, MOSFET, and transistor driver circuits
- Industrial control and automation
- Home appliance control boards
- Sensor isolation and noise filtering
- Communication and interface protection circuits
*Product image for illustration purposes only, actual product may vary.
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