Siemens QRH23B175 - 175 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens QRH23B175 is a 175A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to perform in residential, commercial, and light industrial environments, this unit combines rugged reliability with precise protection to keep electrical systems safe and steady.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping prevent loosening and ensuring consistent electrical continuity even in panels exposed to vibration or frequent door openings.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit response, reducing nuisance trips while rapidly interrupting severe faults.
• 3-pole configuration protects all three phases in a 3‑phase system, promoting balanced protection for motors, drives, and multi‑wired equipment.
• OEM compatibility is designed to fit matching Siemens OEM load centers and panelboards, making replacements and upgrades straightforward without compromising panel integrity.
• Versatile protection for a range of applications tailored for residential, commercial, and light industrial settings, safeguarding critical branch circuits from overcurrent and short circuits.

Technical snapshot

• Manufacturer: Siemens
• Part Number: QRH23B175
• 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

Who benefits most from the QRH23B175? electrical contractors, facilities managers, and technicians responsible for service panels, distribution panels, and subpanels in offices, retail spaces, light manufacturing, and HVAC setups. When you need reliable, coordinated protection for a 3‑phase system with a robust mounting method, this Siemens breaker is a deliberate, high-integrity choice.

Practical use scenarios include upgrading panel protection in an existing Siemens load center, installing a new 3‑phase feed for a motor-driven compressor, or safeguarding a small processing line in a light industrial setting. Its bolt-on design simplifies mounting to compatible bus assemblies, while the thermal-magnetic trip unit minimizes downtime by delivering consistent protection across varying loads and fault conditions.

To maximize performance, pair the QRH23B175 with compatible Siemens panelboards and load centers, and ensure installation follows panel manufacturer torque and wiring guidelines. This combination delivers not only immediate fault interruption but sustained reliability for ongoing operations.

In short, Siemens QRH23B175 is engineered for dependable, balanced, and maintenance-friendly protection across residential, commercial, and light industrial environments—backed by Siemens’ reputation for robust electrical protection and system integrity.