Siemens Speedfax™ B390H Molded Case Circuit Breaker, 240 VAC, 90 A, 22 kA Interrupt, 3 Poles, Thermal Magnetic Trip

Molded Case Circuit Breakers
881122 MFG #: B390H
145.12000 / 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.
  • Features
Sense when an over current occurs
Measure the amount of over current
Act by tripping quickly enough to prevent damage to itself and associated conductors
Mounting with insta-wire
4 to 1/0 AWG copper, 2 to 1/0 AWG aluminum wire