The C10N32D040 is a Schneider Electric ComPacT NSX100N frame circuit breaker with a MicroLogic 2.2 electronic trip unit, rated 40 A at 40 °C, 3-pole, and a breaking capacity code of N — 50 kA Icu at 415 V AC.
Mounting and integration into a distribution panel
Mounts on a backplate — not DIN rail — in either horizontal or vertical orientation, flat on the back. The 105 mm width, 161 mm height, and 86 mm depth fit the standard ComPacT NSX cutout; connection pitch is 35 mm. Both line and load connections are front-facing, so busbar or cable routing stays accessible inside the enclosure.
Electrical durability and thermal memory — what they mean for a motor or distribution load
Rated for 50,000 mechanical cycles and 30,000 electrical cycles at 440 V at full rated current (In). That's enough for a main breaker that sees a few operations per day over a 20-year panel life. The trip unit is electronic, not thermal-bimetal, so it holds calibration over temperature and is less prone to drift than a thermal-magnetic breaker.
Pollution degree 3 (IEC 60664-1) means it's rated for conductive pollution environments typical of industrial panels. Overvoltage category III suits fixed-installation distribution boards. Compliance documentation (declaration of conformity, CE marking) is available from the manufacturer's documentation portal.