Siemens | QJ23B225 | Circuit Breaker | 225A | 3-Pole | 240V | 10kA | Bolt-On

Siemens QJ23B225 Circuit Breaker — a robust 225A, 3-pole, 240V bolt-on overcurrent protector designed for demanding electrical panels. Built to deliver reliable interruption in critical power paths, it features a 10kA interrupting capacity and a secure Bolt-On mounting for fast, vibration-resistant installation. Ideal for maintenance, retrofit, and replacement projects where exact compatibility matters.

• Amperage: 225A
• Poles: 3-Pole
• Voltage: 240V
• Interrupting capacity: 10kA
• Mounting: Bolt-On

With Siemens engineering, this breaker provides predictable trip characteristics that coordinate with other protective devices in a 3-phase network, reducing nuisance trips and enhancing overall system reliability. The bolt-on design simplifies installation in compatible panels, enabling secure connections with fewer field wiring complications.

What makes the QJ23B225 stand out

• Precise 225A rating tailored for feeders and distribution circuits in commercial and industrial settings
• 3-pole configuration delivers balanced protection across all three phases
• High 10kA interrupting capacity at 240V to safely clear faults and protect equipment
• Bolt-On mounting for a sturdy, durable fit in compatible Siemens panels
• Clear labeling and consistent trip curves that align with existing protection schemes

Fit, compatibility, and ordering tips

Confirm fit and ratings before ordering. The part number QJ23B225 is the most reliable reference for compatibility with Siemens panels and breaker frames. When replacing an existing unit, cross-check the panel’s labeling and service documentation to ensure the bolt-on mechanism and 3-pole configuration match your installation requirements.

Ideal use scenarios

• Retrofit projects in aging Siemens panels where a like-for-like 225A, 3-pole, 240V breaker is required
• Maintenance or replacement for 3-phase feeders in manufacturing lines, data centers, or commercial facilities
• New installations where bolt-on reliability and clear protection coordination are priorities

Practical installation and maintenance guidance

• Always power down and follow proper lockout/tagout procedures before work
• Mount using the bolt-on method specified for compatible panels to ensure secure bus bar contact
• Adopt the panel manufacturer's torque and wiring guidelines to prevent loose connections
• Periodically inspect for signs of wear, lug integrity, and proper labeling after installation