Schneider Electric NSX400H Molded Case Circuit Breaker

Schneider Electric's ComPacT NSX400H is a 400 A, 3-pole molded‑case circuit breaker in the NSX family, engineered for compact protection in low‑voltage switchgear. It supports systems up to 690 V and delivers a high short‑circuit interrupting capacity—up to 70 kA at 415 V in typical installations—with multiple MicroLogic trip unit options (1.3M, 2.3 LI, and 4.3) to provide precise thermal and magnetic protection with adjustable trip settings. The NSX400H frame is available with bolt‑on or lug terminations and can be configured in 3P or 4P versions to suit your panel design. This MCCB is designed to integrate into Schneider Electric's EcoStruxure Power architecture, enabling advanced monitoring and coordination within modern power distribution systems. Common applications include feeder protection and distribution panels in commercial, industrial, and data center environments where reliable 400 A protection and high fault‑level performance are required.