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BQ Type 240V General Purpose Breakers

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 breaker's operating handle restores the circuit.

All circuit breakers perform the following functions:

  • 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


Siemens BQ breakers provide easy lug-in/lug-out connections. Siemens offers three AIC ratings for these breakers: BQ @ 10K AIC, BQH @ 22K AIC, and HQL @ 65 K AIC.

There are 4 available constructions to choose from:

  • 1 Pole 120V

  • 2 Pole 120/240V

  • 2 Pole 240V

  • 3 Pole 240V


  • 400Hz Calibration - add suffix Y

  • Marine 50º C Ambient Calibration - add suffix M

  • Fungus Proofing - add suffix F

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