Siemens | QJ23B125A02 | Circuit Breaker | 125A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ23B125A02 Circuit Breaker — a purpose-built protection device designed for durability and precise compatibility in demanding electrical environments. With a 125 Amp rating, a 3-pole configuration, and 240V operation, this bolt-on breaker is tailored for maintenance, retrofit, and replacement projects where exact specifications matter.

Designed to integrate seamlessly with the Siemens QJ family, this breaker employs a bolt-on mounting for a secure, vibration-resistant installation that keeps electrical connections solid over time.

• Amperage: 125A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On
• Part Reference: QJ23B125A02

Ideal use cases

• Maintenance: Replace aging or worn breakers with a direct, exact-spec counterpart to restore panel protection without guessing on compatibility.
• Retrofit: Upgrade panels that require a 3-pole, 125A solution with bolt-on mounting for reliable performance.
• Replacement: Reestablish dependable protection in facilities where using the precise part number ensures correct electrical characteristics and fit.

What makes this breaker stand out

• Exact compatibility reference: The part number, QJ23B125A02, is your best guarantee that the breaker will fit and function as intended in your Siemens panel.
• Secure bolt-on installation: Provides a robust mechanical connection that supports long-term reliability in busy electrical environments.
• Siemens QJ-series alignment: Specifically designed to work with the QJ lineup, reducing installation guesswork and ensuring consistent performance.

Installation and safety tips

• Verify the application requires 125A, 3-Pole, and 240V before ordering to ensure proper protection and compatibility.
• Before any work, shut down power and follow proper lockout/tagout procedures to maintain a safe working environment.
• Prepare the mounting area by ensuring surfaces are clean, level, and accessible to allow proper bolt-on seating and secure wiring connections.

Note: Confirm fit and ratings before ordering. Rely on the part number QJ23B125A02 as the most reliable reference for compatibility with your Siemens panel and existing wiring configuration.