Schneider Electric C40H42D400 ComPacT NSX400H 4P 400 A 70 kA MicroLogic 2.3 Fixed Moulded Case Circuit Breaker

The Schneider Electric C40H42D400 is a 4-pole ComPacT NSX400H moulded case circuit breaker rated 400 A on a MicroLogic 2.3 electronic trip unit. Breaking capacity (Icu) is 70 kA at 380/415 V AC, with a 690 V AC rated operational voltage, for distribution boards that need adjustable long-time, short-time and instantaneous protection.

Technical Specifications

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

The MicroLogic 2.3 trip unit gives adjustable long-time (Ir, 160-400 A) and short-time (Isd, 1.5-10 x Ir) protection with a fixed instantaneous stage, so the C40H42D400 suits a distribution feeder needing selective coordination with downstream breakers without the cost of built-in metering. Its neutral protection is selectable between no protection, half-setting and full setting, so the same breaker covers unprotected, half-rated or fully-rated neutral circuits; Step up to the MicroLogic 5.3 E sibling in the same frame when an integrated energy meter and ZSI are required.