What this part is and what it does
The C11E6TM025B is a Schneider Electric ComPacT NSXm molded-case circuit breaker, 4-pole, with a TM-D thermal-magnetic trip unit rated at 25 A at 40 °C. It is designed for distribution applications per EN/IEC 60947-2, with a breaking capacity of 16 kA at 415 V AC (performance level E). The thermal-magnetic trip provides overload and short-circuit protection in a single device — the bimetal element handles sustained overcurrents, while the solenoid clears fast faults. This is a Category A breaker, meaning it is not intended for selective coordination with downstream breakers; it trips instantaneously on short-circuit.
Key ratings and what they mean for fit
The 25 A rating at 40 °C is the continuous current the breaker carries without tripping under normal ambient conditions. If your panel ambient exceeds 40 °C, derate per the manufacturer's curve — the trip unit is calibrated at that temperature. The 16 kA interrupting rating at 415 V AC tells you the maximum fault current the breaker can safely clear at that voltage; verify that the available fault current at the installation point does not exceed this value. Pollution degree 3 (IEC 60664-1) means the breaker is rated for conductive pollution environments typical of industrial panels — no additional conformal coating required for normal use. Overvoltage category III confirms it is suitable for fixed-installation distribution boards, not just downstream equipment.
Mounting and integration
Mounts on a backplate in either horizontal or vertical orientation, flat on the back. Front connections top and bottom accept compression lugs or busbars; connection pitch is 35 mm with spreaders, 27 mm without. The 4-pole unit occupies 12 module pitches of 9 mm each (108 mm width). IP40 front face protection keeps dust and tools out of the enclosure; IK07 impact resistance handles incidental knocks during panel assembly. The toggle control provides manual on/off operation, and a green flag signals presence of auxiliary contacts — useful for status feedback to a PLC or indicator lamp.