Siemens MQJ2225KH 225A 2-Pole 240 V Circuit Breaker

For heavy-duty electrical feeders in commercial and light industrial settings, the Siemens MQJ2225KH 225A 2-Pole 240 V Circuit Breaker delivers dependable, decisive protection. This 2-pole device shuts off both hot legs together when an overload or fault occurs, helping keep wiring, gear, and personnel safe while minimizing downtime caused by electrical faults.

Part of Siemens’ trusted MQJ line, the MQJ2225KH is designed to integrate smoothly with Siemens panels and distribution setups. With a 225 A current rating and a 240 V operating voltage, it’s purpose-built for large feeders, service entrances, and high-demand equipment runs where reliability matters most.

Key specifications

• Part number: MQJ2225KH
• Current rating: 225 A
• Poles: 2
• Voltage rating: 240 V

Why this breaker stands out

• Robust two-pole protection: Simultaneous disconnect of both hot legs provides enhanced safety for 240 V circuits and large feeders.
• High-capacity protection: 225 A rating targets substantial loads such as large motors, HVAC feeders, and essential service feeders without compromising protection.
• Siemens compatibility: Engineered to pair with Siemens panels and MQJ-compatible installations for reliable operation and straightforward replacement.

Ideal use cases

• Feeder protection for large HVAC equipment, air handlers, pumps, and motors in commercial buildings.
• Main or subfeed protection in service entrances and distribution panels requiring 240 V circuits.
• Upgrading or replacing aging breakers in Siemens-powered installations where a high-current, two-pole solution is needed.

Practical notes for installation and use

• Verify that the panel and bus system are compatible with the MQJ2225KH and rated to handle 225 A.
• Follow manufacturer torque and connection guidelines to ensure secure lugs and reliable operation.
• Label the breaker clearly as a 225 A 2-pole 240 V protective device to support safe maintenance and code compliance.