Siemens QJ23B175H - 175 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens QJ23B175H is a 175A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit protection in panelboards and load centers. Built for environments where vibration and continuous operation matter, this unit offers a secure bolt-on mounting that creates a rigid bus connection and contributes to repeatable protection performance across load conditions.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact and long-term reliability in demanding installations.
• Thermal-magnetic trip unit delivers stable overload protection with the speed of magnetic trip for short circuits, reducing nuisance trips and safeguarding wiring and equipment.
• 3-pole, 240V design ensures simultaneous interruption of all live conductors in three-phase circuits, ideal for balanced power distribution and motor loads.
• 175A rating supports sizable branch circuits and feeders in commercial and light industrial panels, while maintaining compatibility with Siemens panel ecosystems.
• OEM-compatible engineered to integrate with matching Siemens OEM load centers and panelboards, simplifying selection and installation within established systems.
• Durable molded-case construction built to withstand routine cycling and field conditions, helping extend service life in panel installations.

Who benefits from the QJ23B175H? Electrical professionals and facilities teams installing or upgrading panelboards and load centers in commercial, light industrial, and even some residential applications where three-phase distribution and robust protection are essential. It’s an excellent choice for protecting feeders, motors, and critical branch circuits that require reliable coordination with other Siemens devices in the same system.

Why this matters in real-world use: the bolt-on design minimizes movement and arcing risks at the connection point, translating to steadier performance in environments with vibration or temperature fluctuations. The thermal-magnetic mechanism balances protection speed with selectivity, helping you avoid unnecessary outages while safeguarding equipment from fault currents. With the Siemens QJ23B175H, you get a purpose-built solution that aligns with Siemens panels and delivers predictable protection where it’s needed most.

Key specifications at a glance: QJ23B175H, 175A, 240V, 3-pole, bolt-on molded case circuit breaker, intended for branch circuit overcurrent and short-circuit protection.