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rotorwrench · 03-22-2019, 05:35 PM

If it has a direct short to ground then it will pop the circuit breaker instantly. If it takes a while then it is heating up slowly due to resistance. This can also indicate a breaker with a bi-metallic strip getting too old and fried to do the job. These things are still available in quite a few amperage ratings. Don't worry about the voltage rating. They are all rated for 12-volts but will work just the same at 6 to 7 volts.

If it still pops after you replace it then I'd say you have too much resistance in there somewhere.

03-22-2019, 05:35 PM	#19
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,442	Re: Small circuit breaker heats and opens If it has a direct short to ground then it will pop the circuit breaker instantly. If it takes a while then it is heating up slowly due to resistance. This can also indicate a breaker with a bi-metallic strip getting too old and fried to do the job. These things are still available in quite a few amperage ratings. Don't worry about the voltage rating. They are all rated for 12-volts but will work just the same at 6 to 7 volts. If it still pops after you replace it then I'd say you have too much resistance in there somewhere.