Siemens FXD62B125L - 125 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens FXD62B125L is a rugged 125A, 600V, 2‑pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. Built to handle demanding commercial, residential, and light industrial environments, this unit delivers stable protection where it matters most.

Product at a glance

• Amperage rating: 125A
• Voltage rating: 600V
• Poles: 2
• Mounting: Bolt-on for a secure, vibration‑resistant bus connection
• Trip technology: Thermal‑magnetic trip unit for reliable, repeatable protection
• Compatibility: Designed to work with matching OEM Siemens load centers and panelboards

Why this breaker stands out

The FXD62B125L pairs a robust bolt‑on mounting with a thermal‑magnetic trip mechanism. That means you get a solid, vibration‑resistant connection that stays tight through the life of the panel, plus protection that adapts to both sustained overloads and sudden short circuits. The result is predictable performance across a wide range of operating conditions, reducing nuisance trips and safeguarding wiring and connected equipment.

Ideal uses and scenarios

• : Feed large appliances or serve as a main feeder in a home subpanel, ensuring critical circuits stay protected without frequent maintenance.
• Commercial: Manage branch circuits and equipment loads in small offices, retail spaces, and service panels where reliable protection is essential.
• Light industrial: Protect motors, heaters, and other high‑demand loads in workshops or small facilities that require durable, code‑compliant protection.

Compatibility and practical considerations

Designed for seamless integration with Siemens OEM load centers and panelboards, the FXD62B125L offers a straightforward replacement path when upgrading or expanding existing electrical systems. Its molded‑case construction provides compact, space‑efficient installation without compromising protection capabilities. For installations that demand consistent trip performance, this breaker’s thermal‑magnetic design delivers stable coordination across varying temperatures and loads.

Installation guidance and best practices

• Use the bolt‑on mounting as specified to ensure a rigid connection and minimize bus movement during operation.
• Verify that the panelboard is compatible with a 2‑pole, 125A, 600V device of this type before installation.
• Follow local electrical codes and manufacturer mounting torque recommendations to maintain warranty and safety standards.