No. The 15 volt coil draws about 1/3 the current the Trombetta (higher coil resistance) does hence much less power. It's meant for continuous duty and won't burn itself up. The pullin voltage is something like 10 volts and the dropout voltage is something like 6 volts. All well within the application needs.
Go to the White Rodgers web page and read the specs. They recommend this coil for exactly the use for our systems. Much better relay.
The BIRD is the normal one that has a module with 4 spade lugs. One each for the two batteries (chassie & coach), pos and neg for the relay.
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