Trusted Brand Siemens QJ23B12500S01 – 125A 3 Pole Molded Case Circuit Breaker

Designed for remote shutdown applications, this 125A molded case circuit breaker includes a factory-installed 120/240VAC shunt trip. The 3-pole SENTRON device delivers reliable thermal-magnetic protection for commercial facilities. It mounts into Siemens meter centers, panelboards, and switchboards. For modern replacements, this QJ frame transitions to the QR23B125, requiring a separate S01QR2 shunt trip accessory. Operating at 10kAIC at 240VAC, the breaker is HACR and reverse feed rated.