Siemens | B212500S01 | Circuit Breaker | 125A | 2-Pole | 240V | 10kA | Bolt-On

Rugged, reliable overcurrent protection designed for Siemens panels, the Siemens B212500S01 Circuit Breaker offers 125A of continuous protection in a 2-Pole, 240V configuration with a robust 10 kA interrupting rating. Engineered for bolt-on installation, this unit provides a secure, vibration-resistant mount suitable for maintenance, retrofit, and replacement projects where exact compatibility matters.

• Amperage: 125 A
• Poles: 2-Pole
• Voltage: 240V
• Interrupting Rating: 10 kA
• Mounting: Bolt-On
• Part Number: B212500S01

Key benefits and how it serves your needs

Perfect for service panels and retrofit projects that require a precise Siemens bolt-on breaker footprint, the B212500S01 is purpose-built to fit compatible panels without compromising protection. The 125A rating makes it ideal for feeder circuits or large branch loads, such as industrial equipment, commercial HVAC, or heavy machinery where reliable shutoff is essential.

• Proven protection for high-demand circuits — prevents damage from overloads and short circuits on demanding loads up to 125A.
• High fault-current capability — 10 kA interrupting rating means the breaker can safely interrupt substantial fault currents, helping protect wiring and downstream devices.
• Secure bolt-on installation — a stable, vibration-resistant mount designed for panels that use bolt-on breakers, reducing movement and wear over time.
• Strategic replacement option — part number B212500S01 provides a precise compatibility reference for replacement in compatible Siemens panels, easing procurement and installation.

Fit, use cases, and installation considerations

Note: Always confirm fit and ratings with your specific panel before ordering. The B212500S01 is the best reference for compatibility, and the exact part number helps ensure you’re matching the correct breaker family and mounting footprint for your Siemens panel. This breaker is ideal when you need a robust 125A two-pole unit for 240V circuits in retrofit or replacement scenarios.

• : replace aging breakers in commercial panels, retrofit existing infrastructure to support higher-load equipment, or deploy in new installations that require a bolt-on 125A, 2-pole, 240V protection device.
• : follow Siemens installation guidelines for bolt-on breakers, verify torque on mounting screws, and ensure the panel is de-energized during replacement to maintain safety and code compliance.

Whether you’re an electrical contractor, facilities manager, or a maintenance technician, the Siemens B212500S01 delivers dependable protection for critical 125A circuits, with the mounting rigidity and compatibility you need for efficient, reliable electrical system upgrades.