Siemens QJ23B175 - 175 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

This AmpState-listed Siemens QJ23B175 is built for reliability in demanding panel installations. With a robust 175A rating at 240V and a 3-pole, bolt-on design, it delivers steadfast branch-circuit protection where it matters most—in panelboards and load centers that power homes, offices, and light industrial equipment.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose terminations and ensuring consistent electrical performance in busy electrical rooms.
• Thermal-magnetic trip unit offers stable, repeatable protection against both overloads and short circuits, maintaining reliable performance across temperature changes and load variations.
• Three-pole configuration supports balanced three-phase circuits common in commercial and light industrial applications, delivering coordinated protection across all phases.
• 175A at 240V rating is ideal for mid-to-large branch circuits powering motors, HVAC controls, lighting circuits, and other demanding loads without compromising protection.
• OEM panel compatibility engineered to fit Siemens load centers and panelboards, ensuring proper fit, trip coordination, and seamless integration into existing installations.
• Durable molded case construction designed for long service life in challenging environments, providing dependable protection over time.

Ideal for electrical professionals, facilities managers, and maintenance teams seeking a high-current, reliable protection device that integrates smoothly with Siemens panel ecosystems. It’s particularly well-suited for commercial-grade lighting, HVAC-driven loads, and small to mid-size industrial panels where vibration, heat, and continuous operation are factors.

• Three-phase motor circuits in commercial HVAC systems
• Power distribution feeders in panelboards for light industrial setups
• Main or sub-feed protection in bolt-on Siemens panel configurations
• Replacement in existing QJ-series installations to maintain consistent protection and coordination

Technical specifications at a glance:

• Manufacturer: Siemens
• Part Number: QJ23B175
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 175A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the QJ23B175 means opting for a breaker that emphasizes secure installation, precise protection, and compatibility with Siemens electrical systems. It’s a practical, ready-to-install solution for reliable power protection in both new builds and panel upgrades—delivering peace of mind where durability and performance matter most.