Siemens QR23B175L - 175 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens QR23B175L — a robust 175A, 240V, 3-pole bolt-on molded case circuit breaker designed to shield electrical systems from overcurrent and short-circuit events. Built for dependable protection in panelboards and load centers, this unit delivers a secure, vibration-resistant connection through bolt-on mounting and a precise thermal-magnetic trip mechanism that responds consistently to faults.

Key advantages

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that maintains reliable electrical continuity even in environments with movement or vibration.
• Thermal-magnetic trip unit provides stable, repeatable protection against both overloads and short circuits, helping to prevent damage to wiring and connected equipment.
• 3-pole design at 240V, ideal for 3-phase distribution and larger branch circuits common in commercial and light industrial settings.
• Compatibility with matching OEM load centers and panelboards, ensuring a proper fit and seamless integration into existing Siemens installations.
• Suitable for residential, commercial, and light industrial applications where durable, long-term overcurrent protection is required.

Technical specifications

• Manufacturer: Siemens
• Part Number: QR23B175L
• 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

Typical applications and installation guidance

Ideal for panels and load centers that require a rugged, high-capacity protective device, the QR23B175L serves as a main or feeder breaker for large circuits in homes, small businesses, and light industrial facilities. It’s designed to work with matching OEM panel systems, delivering reliable performance without compromising space or panel layout.

• Use cases: protect large branch circuits, feed equipment rooms, or serve as the main disconnect for three-phase loads in compatible panels.
• Who this is for: electrical contractors, facility managers, and professionals upgrading Siemens-based panels or retrofit projects where bolt-on protection is preferred.
• Installation notes: ensure the panelboard accepts bolt-on QR-series breakers and that the system’s bus connection aligns with the device’s mounting configuration. As with all electrical work, installation should be performed by a licensed electrician in accordance with local codes.

With the Siemens QR23B175L in your panel, you get a dependable, high-capacity safeguard for demanding electrical environments. Its secure mounting, precise thermal-magnetic protection, and OEM compatibility make it a practical, long-term solution for ensuring reliable power distribution across residential, commercial, and light industrial applications.