Siemens QJ23B225 - 225 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens QJ23B225, a 225 A, 240 V, 3-pole bolt-on molded case circuit breaker designed to protect your panelboards and loadcenters from overcurrent and short-circuit events. Built for reliability in real-world electrical systems, this device delivers precise, repeatable protection when it matters most.

Secure, reliable protection you can count on

• Bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical performance in panels subject to vibration or movement.
• Thermal-magnetic trip unit delivers stable, predictable response to both gradual overloads and sudden faults, reducing nuisance trips while safeguarding downstream equipment.
• OEM-compatible design is engineered to pair smoothly with matching Siemens loadcenters and panelboards for seamless integration in existing systems.
• Three-pole, 240 V operation makes it ideal for three-phase distribution networks found in residential, commercial, and light industrial applications.

Where this breaker fits into your electrical system

• Protect large branch circuits in panelboards and load centers that require a 225 A rating.
• Use in new installations or as a replacement component within Siemens-based electrical architectures to maintain system consistency and reliability.
• Ideal for environments where panel vibration is a factor, thanks to its secure bolt-on mounting and robust bus connection.

Technical snapshot

• Part Number: QJ23B225
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 225 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the Siemens QJ23B225 over other options

Unlike generic breakers, the QJ23B225 is purpose-built to integrate with Siemens panelboards and loadcenters, ensuring consistent trip behavior and compatibility across your distribution system. The combination of a bolt-on attachment and a thermal-magnetic trip mechanism means you get durable mounting with reliable, fast protection for critical 3-phase loads in commercial and light industrial settings, while still being suitable for residential panel configurations where Siemens components are standard.

Practical tips for optimal performance: verify panel compatibility with Siemens OEM equipment, follow standard installation practices for bolt-on breakers, and evaluate your three-phase load requirements to ensure the 225 A rating aligns with your circuit design. This approach helps you achieve precise protection, streamlined maintenance, and longer-term reliability in your electrical infrastructure.