Item Tag: TLP521

5 pieces of TLP521-1GB TLP521 P521-1GB P521 DIP-4 IC Optocoupler. Product Category: Transistor Output Optocouplers. Product Type: Transistor Output Optocouplers. The LED emits light, which is then detected by the phototransistor, creating an electrical signal that is transmitted through the device's output pins.