Siemens | HJG3F400 | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Siemens HJG3F400 Circuit Breaker, a robust protection device rated for 400 A across a 3-pole configuration at 600 V. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this breaker drops into compatible Siemens panels with minimal fuss and maximum reliability.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V

What makes this breaker the right choice

Designed to help you keep electrical systems safe and up to code, the HJG3F400 delivers balanced protection across all conductors. The three-pole design ensures synchronized disconnection across phases, reducing the risk of arc faults and equipment damage during fault events. It’s an ideal replacement where you already have a matching HJG3F400 reference or where your panel labeling specifies this exact part number.

Use cases and installation scenarios

- Maintenance: Replace aging or worn breakers to restore panel integrity and trip performance.

- Retrofit: Upgrade legacy gear to meet current protection standards while preserving existing wiring and bus connections.

- Replacement: Quick swap-in for panels that specify HJG3F400 as the compatible breaker, avoiding compatibility pitfalls.

How to confirm compatibility

• Match the part number: HJG3F400 is the definitive reference for compatibility.
• Verify system voltage: 600 V rating aligns with your equipment’s requirements.
• Ensure amperage and pole count: 400 A, 3-Pole match your load and bus configuration.

Ideal for professionals who demand reliability

Electrical technicians, facilities managers, and maintenance engineers working in industrial, commercial, or large-residence settings will appreciate the straightforward fit and the decisive protection this Siemens breaker delivers. When downtime is costly and safety is non-negotiable, choosing the right replacement part matters—and the HJG3F400 delivers alignment with Siemens specifications and panel documentation.

Notes: Always confirm fit and ratings before ordering. The part number is the best reference for compatibility, and using a matching 3-pole, 600 V, 400 A device helps ensure a smooth replacement experience.