Siemens | QJ23B125HA01 | Circuit Breaker | 125A | 3-Pole | 240V | Bolt-On

Siemens QJ23B125HA01 is a 125A, 3-Pole, 240V bolt-on circuit breaker designed to deliver dependable overcurrent protection in demanding electrical installations. Built for maintenance, retrofit, and replacement projects, this unit provides a precise match for panels and systems that require Siemens-quality protection with straightforward, secure mounting.

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On

Why this Siemens breaker stands out

• Three-phase protection: 3-Pole design ensures simultaneous disconnection of all phases, safeguarding equipment and wiring from phase-to-phase faults.
• Secure bolt-on installation: Bolt-On mounting provides a robust, vibration-resistant connection within compatible panels, reducing the risk of loose connections over time.
• Compatibility you can trust: The part number QJ23B125HA01 is the best reference for matching accessories and panel compatibility—verify fit and ratings before ordering to avoid compatibility issues.
• Versatile for real-world scenarios: Ideal for ongoing maintenance, panel retrofits, and replacement projects where exact specs are required to keep electrical systems compliant and safe.

Ideal use cases

• Retrofits in commercial or industrial panels that require a 125A, 3-Pole, 240V bolt-on breaker.
• Maintenance replacements to restore reliable overcurrent protection without changing the surrounding panel hardware.
• New installations in three-phase 240V systems where a bolt-on protection device is specified by the panel manufacturer.

Practical guidance for optimal results

• Always confirm fit and ratings against your panel’s specifications before purchasing. The official part number (QJ23B125HA01) is the most reliable compatibility reference.
• Plan for secure mounting and careful conductor routing to maintain clean, fault-free operation over the breaker’s service life.
• Document the installation with panel voltage and phase information to ensure continued compliance and ease of future replacements.

Notes: Confirm fit and ratings before ordering. Part number is the best reference for compatibility.