Schneider Electric NSJ400N-400AMP Circuit Breaker, 400A, 3-Pole, 600V

The Schneider Electric NSJ400N-400AMP Circuit Breaker is engineered for demanding industrial electrical service, maintenance, and replacement projects. With a 400 A capacity across a solid 3-pole design and a 600 V rating, this unit delivers reliable protection for three-phase systems, motor feeders, and heavy equipment in tough industrial environments.

Key advantages that set it apart

• Authentic Schneider Electric performance: designed to integrate seamlessly within Schneider panels and accessories for dependable operation.
• High-current, three-pole protection: 400 A capacity across three poles ensures balanced, coordinated protection for all three phases.
• Versatile 600 V compatibility: suitable for a wide range of industrial control panels, feeders, and motor circuits.
• Part-number driven compatibility: verify fit by part number NSJ400N-400AMP and alignment with your specific application requirements.
• Durable for service and maintenance: ideal for replacement projects or facility upgrades where long-term reliability matters.

Use cases and practical applications

• Replacing aging or failed breakers in three-phase panels serving heavy machinery or processing lines.
• Feeding three-phase motors and conveyors in manufacturing, packaging, or material handling facilities.
• New installations where a robust 400 A, 3-pole, 600 V protection device is required for critical equipment.

Why this matters for your operation

In industrial settings, a single point of failure can halt production. The NSJ400N-400AMP is built to interrupt fault conditions quickly and safely, helping minimize downtime, protect equipment, and safeguard personnel. By choosing an authentic Schneider Electric breaker, you benefit from a proven lifecycle, better spare-part availability, and maintenance compatibility across Schneider electrical systems.

Compatibility and installation notes

Notes: Verify fit by part number and application requirements. Need help matching a part number or confirming compatibility? Message us and we'll help.

Operational tips: before replacement, de-energize the panel, follow lockout/tagout procedures, and ensure wiring size and torque specifications meet the breaker's requirements. Proper labeling and documentation will support smoother future maintenance and inspections.