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Optocoupler IC
PC814 (EL814) Optocoupler SMD 4 Pin IC
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PC814 (EL814) Optocoupler SMD 4 Pin IC
The PC814 / EL814 is a compact phototransistor-output optocoupler housed in a 4-pin SMD package, designed to provide reliable electrical isolation between input and output circuits. It integrates an infrared LED and a phototransistor in a single sealed package, allowing safe signal transfer while blocking high voltages and noise.
This device is widely used in electronic control systems, power supplies, communication circuits, and microcontroller interfaces where PCB space is limited and SMD mounting is preferred.
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Features
- Phototransistor output for easy interfacing with logic or analog circuits
- High isolation voltage (typically 5kV RMS) between input and output
- Compact SMD 4-pin package suitable for automated SMT assembly
- Low input LED current requirements
- Fast response time compared to mechanical isolation devices
- Good CTR (Current Transfer Ratio) stability
- Wide operating temperature range suitable for industrial environments
- Compliance with safety standards (varies by manufacturer)
- Specification
| Input-Output Isolation Voltage(Vrms) | 5.0kV |
| Collector-Emitter Voltage | 80V |
| CTR | 20%-300% at Input Current of ±1mA |
| Input Type | AC Input |
| Package | 4 Pin SMD Package |
Applications
- Switching power supplies feedback and isolation
- Microcontroller and Arduino interfacing with high-voltage systems
- AC mains detection and zero-cross circuits
- Signal isolation in industrial automation
- SMPS, UPS, and inverter control circuits
- Isolated data communication
- Motor driver circuits for protection and noise suppression
- Relay drive isolation
- Battery management and charger systems
*Product image for illustration purposes only, actual product may vary.
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