Siemens B2125H 125A 2P Circuit Breaker, Bolt-On | AmpState

Protect critical electrical circuits with the Siemens B2125H 125A 2P Circuit Breaker, Bolt-On. Built for everyday electrical work, this dependable device delivers reliable circuit protection in panelboards, load centers, and distributed electrical systems. The bolt-on design provides a secure, durable connection to the panel rails, making it a trusted choice for installation teams and field service work.

Why this breaker stands out

• Direct-fit two-pole protection in a 125 A rating guards both live conductors, ensuring simultaneous disconnection for multi-wire circuits and enhanced safety during faults.
• Bolt-On mounting simplifies installation and reduces wobble or movement over time, helping maintain consistent performance in demanding environments.
• Exact part-number match with part number B2125H, crafted by Siemens for panelboards and load centers that require this specific device.
• Versatile use in distribution systems designed to protect feeders and branch circuits in commercial, industrial, and large-residence applications.
• AmpState availability ensures you can source this exact model for spare inventory or new builds, with support to confirm fit when needed.

Ideal applications and use cases

This 2-pole 125A bolt-on breaker is ideal for panel builders assembling distribution panels, maintenance teams stocking reliable spare parts, and electricians performing mid-project upgrades where a precise Siemens component is required. Use it to protect high-load circuits, feeder lines, or subpanels where dual-hot conductor protection and quick-on installation are priorities.

Specifications at a glance

• Siemens
• B2125H
• 125 A
• 2
• Bolt-On
• Panelboards, load centers, electrical distribution

Need help confirming compatibility or finding the exact fit for your panel lineup? AmpState offers support to verify part compatibility and ensure the B2125H is the right choice for your project.