BUY SFH615A-4 https://www.utsource.net/itm/p/11223774.html

Description: SFH615A-4 is an optocoupler manufactured by Infineon. It is a 4-pin DIP package optocoupler with a GaAs infrared LED and a phototransistor output. Features: Isolation voltage of 5000Vrms Low input current of 1mA High CTR of 50-600% High speed response time of 10μs Operating temperature range of -40°C to +85°C Applications: SFH615A-4 is suitable for use in applications such as motor control, power supplies, and industrial automation. It can also be used in applications that require high speed and high isolation voltage. (For reference only)