The OPWH3528-30012SG is a type of Optoflash manufactured by Optoflash GmbH. It is a green LED optocoupler with a wide variety of features, including high speed switching, interference immunity, high end programming, durability, and low power consumption. The product has a wide range of applications, including signal transmission in automotive, communication, industrial, and aviation electronics. It is particularly suited for use in CAN and SAE J1939 systems and can be used to protect ECU from electrical spikes or ground loops. It is also suitable for monitoring and controlling various functions in industrial machinery.