TLP621 IC Optocoupler DIP-4 TLP621

Product Overview

The TLP621 is a photocoupler that combines an infrared LED with a photo-transistor for electrical isolation. It is commonly used in programmable controllers and solid-state relays to separate input and output circuits. By using light to transmit signals, it protects sensitive control logic from high-voltage spikes or noise on the power lines.

Core Specifications

• Collector-Emitter Voltage: 55V minimum, providing a safe margin for typical industrial control signal voltages.

• Isolation Voltage: 5000 Vrms, ensuring high-level protection against dangerous high-voltage transients between input and output stages.