Siemens QR23B225 - 225 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens QR23B225 is a 225A, 240V, 3-pole bolt-on molded case circuit breaker built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed to stand up to demanding electrical environments, it combines robust construction with precise protection for your distribution system.

Why the QR23B225 stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that helps minimize arcing and ensure consistent electrical contact over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance across a wide range of temperatures and loads, reducing nuisance trips while safeguarding equipment.
• OEM-compatible installation is designed to pair with matching Siemens OEM load centers and panelboards, simplifying replacement and upgrade scenarios.
• Heavy-duty, three-pole design is ideal for 3-phase systems, delivering reliable protection for large feeders and multi-wire circuits.
• Versatile application suitable for residential, commercial, and light industrial environments, addressing diverse protection needs in a single device.

Ideal use cases

• Main feeder protection in Siemens panelboards and load centers for 3-phase distribution
• Replacement or retrofit in existing Siemens-originated electrical cabinets to maintain consistent protection specs
• Protection of large-draw circuits and critical branches in commercial or light industrial spaces

Technical snapshot

• : Siemens
• Part number: QR23B225
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 225A
• Voltage rating: 240V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for installation and optimization

Choose the QR23B225 when you need solid, long-term protection for substantial, multi-wire circuits in compatible panelboards. Its bolt-on design simplifies secure mounting in OEM-approved installations, while the thermal-magnetic trip unit helps ensure the breaker responds appropriately to both overloads and short circuits. For best results, pair this device with Siemens panelboards and load centers specified for 3-pole, 240V protection, and verify that the overall system design aligns with local electrical codes and safety standards.

In summary, the Siemens QR23B225 delivers heavyweight protection with reliable performance, making it an excellent choice for safeguarding large 3-phase circuits in residential, commercial, and light industrial applications.