Schneider Electric | NSJ400HC | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On

The Schneider Electric NSJ400HC Circuit Breaker delivers robust, reliable overcurrent protection for three-phase power systems. With a 400A rating, 3-pole configuration, and bolt-on mounting, this unit is purpose-built for maintenance, retrofit, and replacement projects where exact compatibility matters. Designed to perform in demanding industrial environments, it helps keep feeders and motors safe while minimizing downtime during panel upgrades.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole (three-phase)
• Voltage: 600 V
• Mounting: Bolt-On
• Part reference: NSJ400HC, from Schneider Electric

Why this NSJ400HC stands out

What makes this circuit breaker uniquely valuable is its precise fit for Schneider Electric panels and legacy switchgear that require the NSJ400HC series. The bolt-on design supports secure, durable installation in crowded electrical spaces, reducing the risk of loose connections and vibration over time. Its three-pole configuration protects all phases in a balanced three-phase system, delivering dependable interruption protection for feeders and motor-driven loads up to 600 volts.

Ideal use cases

• Maintenance and spare replacement for existing NSJ400HC installations
• Retrofit projects where a 400 A, 3-pole, 600 V bolt-on breaker is specified
• Replacement in commercial or industrial panels requiring robust three-phase protection
• Protected feeders and motor circuits in legacy switchgear that demand the NSJ400HC form factor

Installation and compatibility tips

Before ordering, verify fit and ratings against your panel or switchgear documentation. The NSJ400HC part number is the most reliable reference for compatibility, ensuring the bolt-on mounting aligns with your enclosure and bus configuration. For installation, follow standard safety procedures: power down the system, inspect mounting surfaces for clean, flat contact, and torque mounting hardware to the panel manufacturer’s specifications. Plan for routine inspection of connections to maintain reliable performance over the breaker’s service life.

Practical considerations and benefits

• Minimized downtime during replacements thanks to straightforward bolt-on mounting
• Consistent three-phase protection for evenly loaded networks
• Reliable compatibility with Schneider Electric panels and NSJ-series components
• Clear reference for procurement and maintenance planning with the NSJ400HC designation

Choose the Schneider Electric NSJ400HC for dependable, scalable protection in medium- to large-scale electrical distributions. Confirm fit and ratings before purchasing to ensure seamless integration into your existing panel setup.