The C11B6TM063B is a Schneider Electric ComPacT NSXm 4-pole thermal-magnetic circuit breaker rated 63 A at 40 °C, with a 25 kA breaking capacity at 415 V AC (performance level B). It's a distribution-grade device built to EN/IEC 60947-2, suited for isolating and protecting branch circuits in panelboards and switchboards. The TM-D trip unit gives you fixed thermal and magnetic protection — no adjustment dials, which keeps the spec sheet clean and the installation predictable.
Category A utilisation means it's not intended for motor starting duty; it's a distribution breaker, not a motor circuit protector. The 4P configuration (four protected poles) with neutral on the left covers three-phase plus neutral applications where you need overcurrent protection on all four poles. The 12-module pitch (108 mm wide) takes up standard DIN cutouts.
Integration notes
Front connections on both sides simplify busbar and cable routing in a panel. The 35 mm connection pitch with spreaders (27 mm without) matches standard distribution block spacing. Mechanical durability is 20,000 cycles; electrical durability varies by load — 20,000 cycles at 440 V at half rated current, 10,000 at full rated current. That's typical for a molded-case breaker in distribution service; it's not a switching device for frequent operation. IP40 front face and IK07 impact resistance handle the usual panel environment — tools dropped, dust settling — but it's not washdown-rated. Keep it inside the enclosure. The toggle actuator is manual; no motor operator or shunt trip is listed in this spec set, so remote tripping would require an external shunt trip accessory (not included).