Siemens QR22B175 - 175 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens QR22B175 — a rugged 175A, 240V, 2-pole bolt-on molded case circuit breaker designed to shield your electrical systems from overloads and short circuits. Built for reliable branch circuit protection in panelboards and load centers, this unit combines durable construction with precise thermal-magnetic trip performance for consistent, dependable protection.

• Bolt-on mounting for a rock-solid connection: Secure, vibration-resistant bus terminations reduce loosening over time and maintain consistent trips even in demanding environments.
• Thermal-magnetic trip unit: Combines thermal overload protection with magnetic short-circuit protection, delivering stable, repeatable protection across varying loads.
• 175A, 240V, 2-pole design: Specifically engineered to protect two hot conductors and the connected branch circuits in residential, commercial, and light industrial installations.
• OEM-compatible: Designed to work with matching Siemens OEM load centers and panelboards, ensuring seamless integration with your existing equipment.
• Versatile for multiple settings: Suitable for residential, commercial, and light industrial applications where dependable overcurrent protection is critical.

Key specifications

• Manufacturer: Siemens
• Part Number: QR22B175
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 175A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker is a smart choice

When vibration, heavy loads, or dense panel layouts are part of the equation, bolt-on breakers like the QR22B175 deliver a more dependable connection than other mounting styles. The secure bus connection minimizes the risk of loose contacts that can cause nuisance trips or inconsistent protection. The thermal-magnetic trip behavior provides precise protection characteristics, helping you avoid unnecessary shutdowns while still guarding against dangerous short circuits.

Ideal use cases

• Residential service panels where two-pole protection is required for main feeders or subfeed breakers.
• Commercial distribution panels with higher current needs and frequent wiring activity.
• Light industrial panels where vibration resistance and durable mounting are important for long-term reliability.

Practical installation notes

• Ensure the panelboard or load center is compatible with bolt-on 2-pole breakers of the QR series and supports a 175A rating.
• Follow the manufacturer’s torque specifications for bolt-on mounting to ensure a secure, code-compliant connection.
• Use in circuits protected up to 175A maximum current; plan your feeder and branch circuits accordingly.