The BR-A1 is a larger type of BR-A1D. The specification is just like BR-A1D. That also is a temperature automatic response device and is temperature and current double protective equipment as well. When the heat generated by the increasing temperature from the protected appliances transmits to bimetal element, and reaching the temperature value of scheduled movement, the bimetal element will move immediately so that the contact will be switched of and the circuit will be cut off. When the temperature decreases to the rated temperature value of reposition, bimetal element will return to its initial state, the moving contact will be close and the circuit will be turn on.