Siemens Speedfax™ B145 Molded Case Circuit Breaker, 120 VAC, 45 A, 10 kA Interrupt, 1 Pole, Thermal Magnetic Trip

Molded Case Circuit Breakers
637044 MFG #: B145
Siemens
35.45000 / ea
Circuit breakers provide a manual means of energizing and de-energizing a circuit. In addition, circuit breakers provide automatic over current protection of a circuit. A circuit breaker allows a circuit to be reactivated quickly after a short circuit or overload is cleared. Unlike fuses, which must be replaced when they open, a simple flip of the breakers operating handle restores the circuit.
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