Schneider Electric C40H31M320 ComPacT NSX400H 3P 320 A 70 kA MicroLogic 1.3 M Moulded Case Circuit Breaker

The Schneider Electric C40H31M320 is a 3-pole ComPacT NSX400H moulded case circuit breaker for motor protection, rated 320 A on a MicroLogic 1.3 M electronic trip unit with a short-time (S) and instantaneous (I) electronic trip, with no built-in long-time overload function. Breaking capacity (Icu) is 70 kA at 380/415 V AC, with a 690 V AC rated operational voltage.

Technical Specifications

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

The MicroLogic 1.3 M trip unit gives this NSX400H It provides no thermal overload (L) function of its own, so it is paired with a separate motor overload relay for thermal protection; use it where short-circuit and short-time protection is wanted ahead of a motor starter that already has its own overload device. At 70 kA Icu, the H-frame breaking capacity sets how close to the transformer the breaker can sit; choose the 2.3 M sibling in the same frame when the opposite combination of built-in overload and trip-class control is needed.