Siemens FXD62B125 - 125 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Engineered for dependable branch-circuit protection in panels and load centers, the Siemens FXD62B125 is a 125 A, 600 V, 2-pole bolt-on molded-case circuit breaker designed to keep electrical systems safe, compliant, and running smoothly in demanding environments.

Why this breaker stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, reducing arcing risk and ensuring stable protection even in panels that experience movement or vibration.
• Thermal-magnetic trip unit combines accurate thermal overcurrent sensing with rapid magnetic short-circuit interruption, delivering reliable protection with fewer nuisance trips and faster response to faults.
• OEM-compatible design is engineered to work with matching Siemens OEM load centers and panelboards, simplifying replacements, upgrades, and field servicing without compatibility surprises.
• Versatile for multiple applications—well suited for residential, commercial, and light industrial branch circuits that demand durable, code-compliant protection.

What problems it solves

Whether upgrading an aging panel, replacing a failing breaker, or expanding a system, the FXD62B125 provides a robust, long-lasting solution. Its molded-case construction and bolt-on mounting are designed for environments where reliability matters—from home service panels to small business distribution boards. The 600 V rating supports a wide range of typical electrical installations, while the 2-pole configuration ensures coordinated protection for both conductors on shared circuits.

Technical snapshot

• : Siemens
• Part Number: FXD62B125
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 125 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for who and where

This breaker is a solid choice for electrical professionals and facilities managers responsible for safe, efficient panel maintenance. It’s ideal for replacing old or damaged units in residential service panels, commercial distribution boards, and light industrial panels where a robust, vibration-resistant connection and precise protection are required.

Practical installation tips

Ensure compatibility with your panelboard or loadcenter’s retrofit kit and follow Siemens installation guidelines and local electrical codes. Use the correct torque for bolt-on connections (as specified by Siemens documentation) and verify labeling after installation to confirm the 125 A, 600 V, 2-pole protection is active for the intended circuit.