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Discussion Starter #1
Does anyone know how many amps it takes to switch a relay? I'm wiring 2 relay's for my electric fans and need to get power from the ignition to switch them on and off. I have a wire that runs my electric choke, but its fused for only 10 amps. Would it take more than 10 amps to switch the two relays?
Thanks
Steve
 

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I just bench checked a relay and got the following results:

Tyco Relay VF4/45F11 12VDC 40/30A

To energize the coil to make contact 30 connect with 87 it took a minimum of 6.6 volts with 0.08A to make it "click" closed.

At 10.0 volts the current draw went to 0.11A
At 12.0 volts the current draw went to 0.13A
At 13.0 volts the current draw went to 0.14A
and at 14 volts the current needed was 0.15A

Any switch rated at 1A or higher can switch two of these relays on or off with room to spare.

Always size your wire and it's length to the current demands.

Jim
 

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Discussion Starter #4
Thanks Jim,
Thats what I was looking for. I didn't think it took much to open and close the relay, but I wanted to make sure so I wasn't blowing the 10amp fuse in my electric choke line.
Thanks again

Steve
 
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