The C10B3TM100C is a ComPacT NSX100B 3-pole thermal-magnetic MCCB rated 100 A at 50 °C. The TM-D trip unit gives fixed thermal (overload) and magnetic (short-circuit) protection — no interchangeable rating plugs, so the 100 A frame is the setting. Breaking capacity steps down as voltage climbs: 40 kA at 240 V, 25 kA at 415 V, 20 kA at 440 V, 15 kA at 500 V. For a 400 V panel with an available fault current of 22 kA, this breaker fits. For a 480 V system, the 15 kA Icu at 500 V is the relevant limit — check your SCCR study before committing the BOM line. The 3-pole version (3P) protects all three phases; the 3D protected-poles description confirms all three poles have trip elements.
Deployment context
Mounts on a backplate — not DIN-rail — so plan for a panel cutout or mounting plate. The 105 mm width, 161 mm height, and 86 mm depth fit standard MCCB footprints; the 35 mm connection pitch matches common busbar and lug spacing. IP40 protection means it's suitable for indoor, dry enclosures — no washdown or outdoor duty without an additional enclosure. Horizontal or vertical mounting is allowed; flat on the back is the standard orientation.
Electrical durability and power dissipation
Rated for 50,000 mechanical cycles and 30,000 electrical cycles at 440 V In. That's a solid duty cycle for a panel main or feeder breaker — not a switching device, but it handles regular load-break operations without accelerated wear.