The PC817X2NSZ9F from Sharp is an optocoupler with transistor output. It features a high-speed response, high insulation voltage, and an anti-reverse diode circuit that protects against short-circuiting. The optocoupler features an open emitter transistor output and an integrated GaAs LED light source. It also has a wide photocoupler CTR (current transfer ratio) range of 100 to 400%. The optocoupler offers protection against voltage surge spikes, mechanical vibration, and temperature drift, making it ideal for use in applications with challenging operating conditions. The package of this optocoupler consists of four pins on each side.