Schneider Electric C40R42D400 ComPacT NSX400R 4P 400 A 200 kA MicroLogic 2.3 Moulded Case Circuit Breaker

The C40R42D400 is a Schneider Electric ComPacT NSX400R 4-pole moulded case circuit breaker rated 400 A at 40 °C, with a 200 kA breaking capacity (Icu) at 380/415 V AC. It uses the MicroLogic 2.3 trip unit, which provides an adjustable long-time overload stage (Ir 160…400 A), a fixed-delay short-time stage and a fixed instantaneous stage at 4800 A, and is rated for isolation up to 690 V AC.

Technical Specifications

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

The L-So-I MicroLogic 2.3 combines adjustable long-time overload protection (Ir 160…400 A) with a fixed-delay short-time stage and a fixed instantaneous stage at 4800 A. Pick this variant over the 5.3 E / 6.3 E versions when the board needs straightforward, non-communicating overcurrent protection without metering or zone-selective interlocking. At 200 kA Icu at 380/415 V AC, the R frame is the 200 kA 400 A ComPacT NSX option for boards needing 200 kA at 380/415 V.