2Relay pin out?

  • Hi Guys, just got my 2Relays just wandering what is pin c on the relay . Why and how to use it. Dave

  • Hello @Devan

    I'd say using the C pin is optional. From the drawing you can see that the two C pins are just connected to each other internally. So to connect and switch a load you have two options:

    • use both C pins: connect pin A and C to your power source and connect B and C to your load.
    • do not use C pins: connect one wire of your power source to pin A, connect one wire of your load to pin B and use a direct connection from your power source to your load for the return wire.


  • @felmue Thanks