Siemens HQR23B175 Circuit Breaker – QR Series – 175A – 3 Pole – 240VAC – Thermal Magnetic – Bolt-On

The Siemens HQR23B175 is a QR Series low-voltage molded case circuit breaker designed for reliable overload and short-circuit protection in commercial, industrial, and power distribution applications. Rated at 175A and 240VAC, this 3-pole breaker is suitable for three-phase electrical systems requiring high-capacity protection and dependable performance under demanding conditions.

Equipped with a thermal-magnetic trip unit featuring Long-Time and Instantaneous (LI) protection functions, the HQR23B175 delivers effective protection against sustained overloads and high-level fault currents. Its high interrupting capacity of 65kA at 240VAC ensures safe interruption of severe short-circuit events, enhancing system safety and equipment protection.

Built on Siemens QR frame standard 40°C construction, this breaker features a bolt-on mounting design for secure installation. It is supplied with a “no lugs installed” configuration, allowing flexibility in selecting appropriate terminal lugs based on application needs.

Specifications

• Brand: Siemens
• Part Number: HQR23B175
• Series: QR Series
• Type: HQR2 Molded Case Circuit Breaker
• Category: Molded Case Circuit Breaker
• Mounting Type: Bolt-On
• Frame Type: QR Frame Standard 40°C Breaker
• Protection Type: Thermal Magnetic
• Trip Unit: Fixed, Non-Interchangeable
• Special Features: No Lugs Installed

Electrical Ratings

• Current Rating: 175A
• Voltage Rating: 240VAC
• Number of Poles: 3 Pole
• Phase: 3 Phase
• Interrupting Capacity: 65kA @ 240VAC
• Trip Functions: LI – Long-Time and Instantaneous

Construction

• Low-voltage molded case design
• QR frame construction (40°C standard)
• Bolt-on mounting configuration
• Thermal-magnetic trip mechanism
• Supplied without lugs installed
• Heavy-duty industrial-grade housing
• Designed for high fault-current applications

Functions

• Overload protection
• Short-circuit protection
• Long-time delay protection
• Instantaneous fault protection
• Circuit switching and isolation

Dimensions

• Height: 4.331 in
• Width: 7.087 in
• Depth: 3.937 in
• Weight: 4.52 lbs

Standards

• CSA Approved

Applications

• Commercial electrical distribution systems
• Industrial power distribution panels
• Switchboards and panelboards
• Three-phase branch circuit protection
• Heavy equipment and feeder protection

Returns are easy

You may return items within 30 days of delivery for a refund.

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