The C11F6TM040B is a Schneider Electric ComPacT NSXm moulded-case circuit breaker (MCCB) rated 40 A at 40 °C with a 4-pole (4P) configuration.
Above that temperature, you derate per the IEC 60947-2 thermal curve. For service (Ics), expect a percentage of Icu per standard practice. The 4P design switches all four poles, with the neutral on the left. The TM-D trip unit is fixed, non-interchangeable in the NSXm frame — what you order is what you get. Mounting is backplate (not DIN rail), with front connections top and bottom for compression lugs or busbars. The 108 mm width × 137 mm height × 80 mm depth footprint fits standard distribution panel cutouts. Overvoltage category III suits fixed-installation distribution boards. The IP40 front face keeps tools and fingers out; the IK07 impact rating handles a 2 J blow (a dropped screwdriver) without cracking the case.
