Schneider Electric | NSJ400A | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

Schneider Electric NSJ400A circuit breaker is engineered for demanding 600V power systems. With a 400A rating spread across 3 poles and a bolt-on mounting design, this unit is built for quick, secure installation in compatible panels. It’s the go-to choice for maintenance, retrofit, or replacement projects where exact specifications matter and downtime is minimized.

Key specifications

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Mounting: Bolt-On
• Reference: NSJ400A

Why this matters

In field applications, a bolt-on 3-pole design like the NSJ400A translates to faster service and a more secure electrical connection. This breaker is suited for distributed loads in industrial and commercial environments where a reliable 400A protection point at 600V is required. By matching the exact part number, you ensure compatibility with Schneider Electric panels and the intended bus configuration, reducing the risk of mismatches during replacement or retrofits.

Ideal use cases

• Maintenance work on existing 600V Schneider Electric systems
• Retrofits to upgrade or modernize aging panel configurations
• Replacement in service panels or large-capacity distribution setups requiring 3-pole, 400A protection

Installation and compatibility tips

Before purchasing, verify that your panel accepts NSJ400A bolt-on breakers and that the 3-pole, 400A, 600V ratings align with your system requirements. The part number NSJ400A is the most reliable reference for compatibility. For a smooth retrofit, have the panel’s documentation on hand, confirm mounting clearances, and follow the panel manufacturer’s torque specifications and safety guidelines during installation. When in doubt, consult a qualified electrician to ensure proper fit and safe operation.