Schneider Electric C40N42D400 NSX400N 4P 400A 50kA Moulded Case Circuit Breaker

The Schneider Electric C40N42D400 is a Compact NSX400N series moulded case circuit breaker (MCCB) rated at 400A with a 4-pole configuration and a breaking capacity of 50 kA at 415V AC, making it a robust solution for industrial power distribution and switchboard protection. Designed for demanding electrical installations, the NSX400N delivers reliable overcurrent and short-circuit protection in commercial and industrial environments where high fault levels must be managed safely.

Technical Specifications

Applications & Use Cases

• Industrial Power Distribution: Ideal for main and sub-distribution boards in factories, manufacturing plants, and process industries where high fault current protection is essential.
• Commercial Buildings: Suitable for main incoming protection in large commercial buildings, data centres, and infrastructure projects with 415V AC three-phase supply systems.
• Switchboard & Panel Protection: Used as a main circuit breaker or feeder breaker within MCC (Motor Control Centres) and LV switchboards requiring 400A switching and protection capability.
• Generator & Transformer Protection: The 50 kA breaking capacity at 415V AC makes the NSX400N well suited for protecting downstream circuits fed from generators or transformers with elevated prospective short-circuit currents.