Broadcom HCPL-817-00DE Phototransistor-Optocoupler DIP-4 Type (misc.) AC-PhotoTX-Coupler 1-channel

The main task of an optocoupler in electronic devices is the electrical separation and the interference suppression of the signal. This is necessary in a large number of applications, ranging from power supply and motor control to data communication and data processing. Optocouplers eliminate all kinds of electromagnetic interferences. One achieves a secure signal separation.

Price: 0.69 from Conrad Electronic