Schneider Electric | MJP36400 | Circuit Breaker | 400A | 3-Pole | 600V

The Schneider Electric MJP36400 Circuit Breaker is a robust 400A, 3-pole protection device engineered for 600V electrical systems. Built to support maintenance, retrofit, and replacement projects, this breaker ensures reliable overcurrent protection in demanding industrial environments while integrating seamlessly with existing panel infrastructure.

Key benefits that matter in the field

• Exact electrical footprint: 400A rating, 3-pole configuration, designed for 600V systems, enabling confident compatibility with 3-phase distributions.
• Reliable protection for upgrades and repairs: A dependable choice when you’re maintaining uptime during retrofits or swapping out aging breakers.
• Strong compatibility through part-number accuracy: The MJP36400 is the best reference for ensuring a proper fit with compatible Schneider Electric panels and accessories.
• Proven brand ecosystem: Backed by Schneider Electric’s engineering lineage, ensuring long‑term support, spares, and serviceability within an established product family.

Ideal use cases

• Maintenance projects that require swapping like-for-like protection without panel redesigns.
• Retrofits where upgrading to a higher reliability, standards-aligned breaker is needed in 600V installations.
• Replacement of worn or obsolete breakers in industrial control panels, switchgear, and main distribution panels that operate at 600V.

How to verify fit and ratings

Before ordering, confirm that the MJP36400 matches your panel’s requirements. The part number serves as the most reliable reference for compatibility with existing gear. Cross-check the amperage, voltage rating, and pole configuration (400A, 3-Pole, 600V) against your installation’s specifications to ensure seamless integration and protection reliability.

Practical considerations and installation notes

• Handle with power off and follow all site safety procedures during installation or replacement.
• Ensure mounting and busbar interfaces align with the panel design to maintain proper electrical contact and safe operation.
• Keep to Schneider Electric’s recommended torque and fastening guidelines to preserve connection integrity and trip performance.