Bill and all. I have relays that are perfect for your suggested use. I use them in my Magnetic Sentinel anti theft device and the Headlight Relay Kit that I developed for cars to remove the high current load from the headlight switch. I buy the relays in volume so the price of $10 each is quite attractive. The relays are made by Bosch and have a 40 amp ratting. They are about 1 inch square and 1 1/4 inches long including the mounting tab. I also have them in 6 volt with all other dimensions and ratting the same. The 6 volt version is more costly at $16 due to much lower production. I could product a kit with an auto resetting circuit breaker if there is enough interest. Of course I will sell the relays and circuit breakers individually. The circuit breakers and boot $6.50 each. I believe $5 will mail them any where in the US but would probably need more for off shore. Club members should email me if interested. Minnesota Marshall Red G.