Siemens BQD170 Molded Case Circuit Breaker

The Siemens BQD170 is a 1-pole molded case circuit breaker rated for 70 A at 277 V AC, part of the BQD/CQD family designed for use in Siemens panelboards and compatible with standard 277 V single-phase distribution. It provides a 14 kA interrupting capacity at 277 V, enabling rapid disconnection of fault currents to protect conductors and equipment, with a compact molded design suited for dense panel layouts. This device protects single-phase feeders and branch circuits on 277 V systems and is intended for installation in Siemens panels that accept BQD-series breakers, offering dependable overcurrent protection for lighting feeders, control circuits, and general power distribution in commercial settings. For Siemens panelboards that accept BQD-series breakers, the BQD170 provides a direct 1-pole solution for 70 A at 277 V.