Siemens QJH22B125 125A 240V 2-Pole Circuit Breaker

The Siemens QJH22B125 is a 125 A, 240 V, 2-pole bolt-on molded case circuit breaker designed for reliable branch circuit protection in panelboards and loadcenters. Built to endure the demands of residential, commercial, and light industrial environments, this unit delivers consistent protection where it matters most.

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection for dependable performance in demanding installations.
• Thermal-magnetic trip unit provides stable, repeatable protection that responds to overloads and short circuits with precise, predictable tripping behavior.
• 125 A, 240 V, 2-pole design makes it ideal for protecting larger branch circuits and feeding essential equipment in a variety of panelboard configurations.
• OEM compatibility engineered to be used with matching Siemens OEM loadcenters and panelboards, simplifying replacement and upgrades.
• Versatile applications suitable for residential, commercial, and light industrial installations where dependable overcurrent and short-circuit protection is required.

Why choose the Siemens QJH22B125? It combines robust, vibration-resistant mounting with precise trip performance, reducing the risk of nuisance trips and enabling quick, reliable protection for critical circuits. The bolt-on design simplifies installation in compatible panelboards, while the 125 A rating at 240 V covers a broad range of branch circuit needs without over-engineering protection for smaller loads.

Technical snapshot

• Manufacturer: Siemens
• Part number: QJH22B125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 125 A
• Voltage: 240 V
• Poles: 2
• Mounting: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases include upgrading existing panelboards that require a reliable 125 A, 240 V two-pole protector, replacing a failed breaker in compatible Siemens loadcenters, or provisioning new installations that demand sturdy, code-compliant overcurrent protection. With the Siemens QJH22B125, you get a trusted solution designed to fit seamlessly into Siemens-supported electrical architectures, backed by decades of engineering excellence.