The 4N35 is a popular optocoupler IC that combines an infrared LED and a phototransistor in a 6-pin DIP package. It provides reliable electrical isolation between input and output circuits, protecting sensitive components from voltage spikes and noise. This makes it ideal for signal isolation, microcontroller interfacing, and switching applications. The 4N35 offers fast response time, excellent stability, and long operational life, making it a standard choice for industrial and consumer electronic designs.

Specifications

• Type: Optocoupler / Phototransistor

• Package: DIP-6 (Through-Hole)

• Input LED Forward Voltage (Vf): 1.2V (typical)

• Collector-Emitter Voltage (Vce): 30V

• Current Transfer Ratio (CTR): 100% (typical)

• Isolation Voltage: 5000 Vrms

• Collector Current (Ic): 50mA max

• Response Time: 3µs (typical)

• Operating Temperature: -55°C to +100°C

Applications

• Microcontroller and logic level interfacing

• Power supply feedback and monitoring

• Signal isolation and noise suppression

• Triac and transistor triggering

• Industrial control and automation circuits

Key Features & Benefits:

• Effective Isolation: Helps protect sensitive circuits from high-voltage spikes

• Integrated LED & Phototransistor: Ensures reliable and efficient signal transmission

• Standard DIP Package: Compatible with through-hole PCBs and breadboards

• Wide CTR Range: Flexible for different logic and interface designs

• Reliable Performance: Proven solution for industrial and consumer applications