Siemens | HGB3K125B | Circuit Breaker | 125A | 3-Pole | 600V

Meet the Siemens HGB3K125B circuit breaker—a sturdy, 125 A, 3-pole unit designed for 600 V three-phase systems. Built for maintenance, retrofit, and replacement projects, this breaker is precisely the component you need when your panel demands exact specifications and reliable protection.

Key specifications at a glance:

• Amperage: 125 A
• Poles: 3-Pole
• Voltage: 600 V
• Part number: HGB3K125B

Why this Siemens breaker stands out

• Tailored for three-phase distribution, enabling clean, balanced protection across all three legs in commercial or industrial panels.
• Spec-aligned design makes it an ideal replacement or retrofit when upgrading or restoring system reliability without overhauling the entire panel.
• Part number is the best reference for compatibility—use it as your primary check to ensure the 125 A, 3-Pole, 600 V ratings align with your existing setup.

Use cases and practical scenarios

• Facility maintenance: swap in a reliable Siemens breaker that matches the existing amperage and voltage requirements to minimize downtime.
• Retrofit projects: upgrade older panels to a current, field-proven 125 A, 3-Pole, 600 V solution that fits standard Siemens enclosures.
• Replacement needs: replace worn or worn-out components with a direct-match part number to maintain system protection and performance.

Ordering guidance

Before you order, verify fit and ratings against your panel labeling. The HGB3K125B is the best reference for compatibility, ensuring you get a seamless, safe, and code-compliant installation.