Siemens NSB QJ23S225A Molded Case Circuit Breaker

Siemens NSB QJ23S225A Molded Case Circuit Breaker is a 3-pole MCCB rated for 225 amperes at 240 volts, belonging to Siemens’ QJ family of molded case switches. Built as a compact, factory-assembled protective device, this breaker fits into Siemens-compatible distribution panels and switchgear to interrupt overcurrent events and safeguard feeders and branch circuits in commercial and light industrial installations. The QJ23S225A designation identifies a 225 A, 3-pole variant of the QJ line for 240 V operation, providing the reliable overcurrent protection expected from Siemens’ molded-case breakers. With its molded-case construction, it combines rugged enclosure, proven electrical performance, and compatibility with standard QJ frame mounting schemes used in many panelboard configurations. This model is intended for use in 240 V distribution systems where a 225 A protective device is appropriate, helping engineers meet short-circuit and overload protection requirements.