BUY H11C4 https://www.utsource.net/itm/p/11224634.html

Description: Optocoupler, Phototransistor Output, with Base Connection Features: * Isolation Voltage: 5000Vrms * CTR: 50-400% * Operating Temperature: -55°C to 100°C * Package: DIP/6P,QTC Application: H11C4 is used for electrical isolation between two circuits. It is commonly used in motor control, power supply, and other industrial automation applications. (For reference only)