Siemens QJ22B175 175A 2P 240V Circuit Breaker, Bolt-On | AmpState

The Siemens QJ22B175 is a rugged, bolt-on circuit breaker designed for high‑current protection in panelboards, load centers, and whole‑house electrical distribution setups. With a 2‑pole configuration and a 175 A rating at 240 V, it delivers dependable, coordinated protection for demanding feeders and main circuits.

Why this model stands out for professionals:

• Bolt‑On mounting for a secure, vibration‑resistant connection in commercial and industrial panels.
• 2-pole design ensures simultaneous interruption of both conductors, protecting equipment and reducing nuisance trips.
• 175 A / 240 V capacity is ideal for larger loads and subfeed circuits, helping to prevent nuisance trips on heavy demand systems.
• Direct part-number match matters for maintenance teams, panel builders, and spare inventory—minimizing downtime from incorrect replacements.
• Siemens ecosystem compatibility—built to integrate with Siemens panelboards and load centers that accept QJ bolt-on breakers, maintaining consistent performance across your distribution network.
• AmpState availability offers reliable sourcing and support to confirm fit and compatibility when you’re commissioning or stocking parts.

Ideal use cases

This breaker shines in commercial and light industrial panels where a robust, hard‑mounted protection device is required for large feeders or main circuits. Use it when you need:

• Replacement for a failed or discontinued bolt-on Siemens breaker in a panel that accepts the QJ style.
• Strategic spare inventory for maintenance teams to reduce downtime during scheduled or emergency outages.
• Accurate part matching in new builds or panel upgrades where exact part numbers ensure seamless commissioning.

Compatibility and fit considerations

The QJ22B175 is intended for Siemens panelboards and load centers that specify a 2‑pole, bolt‑on, 240 V, 175 A protection device. If you’re unsure about fit, AmpState offers support to help verify compatibility and confirm the correct part number for your panel configuration. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: QJ22B175
• Product Type: Circuit Breaker
• Amperage: 175 A
• Poles: 2
• Voltage: 240 V
• Mounting: Bolt-On

Equip your panel with a trusted Siemens bolt-on breaker that delivers consistent protection and straightforward, reliable installation. Available from AmpState—engineered for professionals who demand precise part matching, clear compatibility, and dependable performance in every distribution task.