The Schneider Electric C40W32M320 is a 3-pole ComPacT NSX moulded-case circuit breaker rated 320 A at 65 °C, fitted with a MicroLogic 2.3 M electronic trip unit. It is designed for motor protection in industrial distribution panels, with a breaking capacity of 100 kA Icu at 690 V AC 50/60 Hz per EN/IEC 60947-2. The electronic trip unit provides L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous short-circuit) protection, plus selectable motor tripping classes 5, 10, or 20. This means it coordinates with motor starting inrush while clearing hard faults at full rated interrupting capacity.
The electrical durability of 12,000 cycles at 440 V In/2 and 6,000 cycles at 440 V In tells you the breaker is rated for regular switching, not just fault backup — expect to use it as a motor disconnect under load within those cycle limits. Mechanical durability of 15,000 cycles covers the mechanism itself.
The 140 mm width, 255 mm height, and 110 mm depth fit standard ComPacT NSX panel cutouts. IP40 enclosure protection and IK07 impact resistance suit indoor panel installation — not washdown, but fine for dry industrial environments.