The C11F4TM040B is a Schneider Electric ComPacT NSXm moulded-case circuit breaker, 40 A rated current with a thermal-magnetic TM-D trip unit. Four-pole, 36 kA breaking capacity at 415 V AC — that's the F performance level, meaning it clears faults up to that level without upstream coordination issues in a distribution panel. Mounts on a backplate, 108 mm wide, 12-module pitch at 9 mm per module.
What the ratings mean for fit
40 A at 40 °C is the continuous current rating — don't push it past that in a warm panel. The TM-D trip unit gives thermal-magnetic protection: thermal for overloads, magnetic for short-circuits. Category A utilisation means it's not intended for cascading selectivity with downstream breakers; you coordinate it at the panel level. 36 kA at 415 V AC is the interrupting rating — the breaker can safely clear a fault up to that available current. In a 400 V distribution board with a transformer sized for 36 kA or less, this holds. Above that, you need a higher-rated frame. Pollution degree 3 and overvoltage category III suit it for industrial fixed-installation panels, not residential. IP40 front face, IK07 impact resistance — it's protected against tools and wires >1 mm, but not washdown. Keep it inside the enclosure, not on the machine exterior. The flag indicator on top shows green when auxiliary contacts are present — a quick visual for panel walk-downs.
Where it goes
This is a distribution breaker for a 400 V AC, 50/60 Hz three-phase panel. Four-pole, so it switches all three phases plus neutral. Neutral fixed left, front connections top and bottom — compression lug or busbar. Mounts flat on a backplate, horizontal or vertical. 80 mm deep, 137 mm tall — fits standard distribution board cutouts.
Lifecycle and sourcing
Listed as current production. No end-of-life notice on record. Sourced to order against an RFQ — we confirm availability and current pricing at quote time. For volume or scheduled releases, submit the C11F4TM040B line item and we'll quote firm.