Schneider Electric C40F42D400 NSX400F 4P 400A 36kA ComPacT Molded Case Circuit Breaker

The Schneider Electric C40F42D400 NSX400F is a 4-pole 400A molded case circuit breaker from the ComPacT NSX new-generation series, delivering a breaking capacity of 36 kA at 415V AC for robust short-circuit and overload protection in demanding industrial power distribution systems. Rated at 415V AC, the NSX400F combines thermal-magnetic trip technology with a compact frame design, making it a reliable choice for main and sub-distribution switchboards where space and performance are both critical priorities.

Technical Specifications

Applications & Use Cases

• Main Distribution Boards: Ideal as an incomer or outgoing MCCB in LV main distribution panels handling high fault-level environments up to 36 kA.
• Industrial Power Distribution: Protects feeders supplying motors, transformers, and large loads in manufacturing plants, process industries, and commercial facilities.
• Sub-Distribution Switchboards: 4-pole configuration suits three-phase plus neutral applications in TN-S and TT earthing systems.
• Generator & Tie Protection: Suitable for generator output protection and bus-tie applications where reliable fault isolation at 415V is essential.

Frequently Asked Questions

What is the breaking capacity of the Schneider Electric C40F42D400 NSX400F?

The NSX400F (C40F42D400) has an ultimate breaking capacity (Icu) of 36 kA at 415V AC, making it suitable for high fault-level industrial installations.

How many poles does the NSX400F have?

The C40F42D400 is a 4-pole MCCB, accommodating three-phase plus neutral circuits as required in balanced distribution systems.

What series does the C40F42D400 belong to?

It belongs to the Schneider Electric ComPacT NSX new-generation series, designed for optimised performance in compact switchboard designs.

What is the rated current of the NSX400F?

The NSX400F (C40F42D400) is rated at 400A, suitable for medium to large feeder protection in industrial and commercial LV distribution.