The C100H35AFM is a Schneider Electric ComPacT NS new generation 3-pole moulded-case circuit breaker with a MicroLogic 5.0 A electronic trip unit rated 1000 A at 50 °C. This is the main distribution breaker for a 1000 A bus — not a feeder device. The 70 kA Icu at 415 V AC (breaking capacity code H) means it can safely interrupt a fault current up to 70,000 A at that voltage without self-destructing, which covers most industrial secondary-distribution scenarios on 400 V class systems. The IEC 60947-2 Category B utilisation confirms it is listed for selectivity with downstream breakers, so you can coordinate trips and keep the rest of the plant live when a feeder faults. The electronic trip unit provides LSI protection: long-time overload (L), short-time short-circuit (S), and instantaneous short-circuit (I). The 20-minute thermal memory means the trip curve remembers prior heating — important for motor-start or repeated inrush loads where a cold-trip calculation would mis-coordinate. The LCD display and ammeter measurement let you read load current on the face without a clamp meter, which speeds troubleshooting on a live panel.
Fixed-mount on a backplate, 327 mm high × 210 mm wide × 147 mm deep. Front-connect both sides — upside and downside — so it fits a typical switchboard lineup without rear-access cable boxes. IP40 front face keeps fingers out; IK07 impact rating handles accidental tool contact in a live panel. Pollution degree 3 (IEC 60947) means it is rated for conductive-dust environments like cement or grain handling, not just clean switchrooms. Power loss is 22 W at rated current — negligible for enclosure heating calculations but worth noting if you pack multiple breakers in a small cabinet. The 4 red fault LEDs and one yellow overload LED give immediate visual status without opening the door.