The Schneider Electric C10W36E040 is a ComPacT NSX100HB2 moulded-case circuit breaker, 3-pole, rated 40 A at 40 °C, fitted with a MicroLogic 6.2 E electronic trip unit that provides LSIG protection — long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I), and ground-fault (G) protection. Breaking capacity is 100 kA Icu at 690 V AC 50/60 Hz, certified to EN/IEC 60947-2, which means it can safely interrupt fault currents up to that level without upstream cascading in a distribution panel.
Mounts on a backplate in horizontal or vertical orientation, flat on the back. Front connection both upside and downside. The 105 mm width and 161 mm height fit standard ComPacT NSX cutouts; depth is 86 mm. IP40 enclosure protection (IK07 impact) suits indoor distribution boards and motor control centres — not washdown, but fine for a clean panel environment. Overvoltage category III, meaning it's designed for fixed installation downstream of the service entrance, not for branch-circuit final sub-distribution.
For selectivity coordination downstream, the short-time (S) protection can be adjusted to ride through transient faults while letting downstream breakers clear. Electrical durability is 20,000 cycles at 440 V In/2, 10,000 cycles at 440 V In, 10,000 cycles at 690 V In/2, and 5,000 cycles at 690 V In — mechanical durability is 20,000 cycles. For a distribution breaker that sees infrequent switching, this is ample; for a frequent switching application (e.g., motor start-stop), the electrical endurance at full rated current is the limiting figure.