OS5RPM5HA3B-NO is an optocoupler manufactured by Optosupply. It is a 5mm square, wide-angle,PCB miniature optocoupler with an integrated photo diode and infrared LED mounted on a single pluggable terminal block. The optocoupler has a 5A output current, a 4.5 - 5.5V forward voltage, and a 0.2 milliseconds minimum response time. It is suitable for applications such as triac dimming control, AC motor speed control, AC line voltage sensing, and industrial digital data logging, among others.