Siemens BQ3B045 – 45A 3 Pole Molded Case Circuit Breaker Top Pick

Utilizing proven thermal-magnetic technology, this 45-amp circuit breaker safeguards commercial power systems. It delivers consistent response times to clear electrical faults safely. Engineered with a bolt-on configuration, it installs firmly into Siemens P1 and older ITE panelboards. It serves as an excellent replacement for existing BAB3045 or QOB345 breakers. Operating at 240VAC with a 10kAIC capacity, it handles standard loads and is HACR certified for HVAC equipment.