Siemens QR22B175L - 175 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens QR22B175L—a 175 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for durability in real-world electrical environments, it’s a trusted choice for both new installations and reliable replacements.

Why this Siemens QR22B175L stands out

• Secure bolt-on mounting—engineered for a rigid, vibration-resistant bus connection that stays put in demanding setups, reducing movement-related wear and ensuring consistent protection performance.
• Thermal-magnetic trip unit—combines thermal overload protection with instantaneous magnetic response for short circuits, delivering stable and repeatable protection across a range of operating conditions.
• 22B175L designation—2-pole design at 175 A and 240 V, ideal for protecting larger branch circuits in residential, commercial, and light industrial applications.
• OEM compatibility—specifically designed to be compatible with matching Siemens OEM load centers and panelboards, simplifying replacement and upgrade workflows.
• Durable molded-case construction—built to endure frequent switching, thermal cycling, and routine maintenance in busy electrical rooms.

What problems does it solve?

When a branch circuit needs robust protection without sacrificing reliability, the QR22B175L provides a clear solution. The bolt-on design minimizes loosening and vibration-related trips, while the thermal-magnetic trip unit delivers quick, controlled responses to overloads and short circuits. This combination helps prevent damage to wiring and equipment, improves system uptime, and simplifies maintenance in panelboards and load centers.

Ideal use cases

• New installations requiring a high-current, 2-pole bolt-on breaker in Siemens-compatible panelboards.
• Replacements in residential feeders, commercial lighting, or small-machinery circuits where vibration resistance is a priority.
• Upgrading or standardizing protection across existing Siemens OEM load centers and panelboards for consistent performance.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: QR22B175L
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 175 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for installation and use

Choose the QR22B175L when you need a robust, high-current protection device that aligns with Siemens panelboard ecosystems. Ensure compatibility with the existing panelboard model and follow the panel manufacturer’s installation torque and mounting guidelines for bolt-on devices. This breaker is well-suited for environments where reliability and vibration resistance are critical, such as service entrances, commercial spaces, and light industrial settings.

For electricians and facilities managers, the Siemens QR22B175L represents a thoughtful balance of performance and practicality: a 175 A, 240 V, 2-pole bolt-on MCCB with a thermal-magnetic trip unit, designed to deliver consistent protection in Siemens-compatible panelboards and load centers across residential, commercial, and light industrial applications.