ONSEMI FOD817ASD Phototransistor Optocoupler, SMD DIP, 4-Pin, 5kV

The ONSEMI FOD817ASD is a highly reliable, single-channel phototransistor optocoupler designed for surface mount applications. This component forms a crucial link between two electrically isolated circuits by utilising a gallium arsenide infrared emitting diode to drive a silicon phototransistor, ensuring safe and noise-free signal transmission. Its robust design makes it an ideal choice for interfacing digital logic and microprocessor inputs with higher voltage or noisy industrial environments.

Engineered for durability and performance, the optocoupler guarantees a minimum collector-emitter voltage (BVCEO) of 70V and offers a high maximum working insulation voltage of 850V. It features a formidable isolation voltage rating of 5kV, providing excellent protection against voltage spikes and transients. The device supports a high allowable overvoltage and delivers a current transfer ratio (CTR) of 80-160%, ensuring efficient signal coupling.

Key Features & Benefits

• Galvanic Isolation: Provides 5kV of electrical isolation, protecting sensitive microprocessors and logic circuits from high-voltage disturbances.
• Surface Mount Design: The SMD DIP package allows for compact, high-density PCB assembly, saving valuable board space.
• High Reliability: With a guaranteed BVCEO and high insulation voltage, it offers stable performance in demanding conditions.
• Wide Compatibility: Suitable for a broad range of digital interface applications, from simple logic level shifting to complex power management systems.

This optocoupler is a fundamental component for enhancing system safety and signal integrity in modern electronics.