Broadcom HCPL-817-30DE 1-Channel Phototransistor Optocoupler 50mA 5kV

The Broadcom HCPL-817-30DE is a high-performance, single-channel phototransistor optocoupler, designed for reliable signal isolation in modern electronic circuits. This surface-mount device integrates a light-emitting diode (LED) that is optically coupled to a phototransistor, providing a robust barrier for transmitting signals between circuits with different electrical potentials and impedances. It is an essential component for ensuring safety and preventing noise interference in sensitive applications.

A key specification is its high isolation voltage of 5000Vrms (5kV), which offers excellent protection against voltage spikes and enhances system reliability. The device features a fast typical response time of 4µs, making it suitable for applications requiring quick signal transmission. It is designed to handle a forward current (If) of up to 50mA and has a high minimum current transfer ratio (CTR) of 300%, ensuring efficient signal coupling.

Key Features & Benefits

• Electrical Isolation: Provides 5kV isolation, protecting low-voltage control circuits from high-voltage lines.
• High Efficiency: A minimum CTR of 300% ensures strong output signal relative to the input current.
• Compact SMD Design: The 4-pin Surface Mount DIP (DIP-4) package saves valuable board space in densely populated PCBs.
• Robust Performance: With a collector-emitter voltage (V(br)ceo) of 70V and a total power dissipation of 200mW, it is built for stable, long-term operation.
• Fast Switching: A 4µs typical response time supports applications requiring rapid signal processing.

This optocoupler is a fundamental building block for designers needing to implement safe, noise-free signal interfaces across different parts of an electronic system.