Schneider Electric C11B6TM063B ComPacT NSXm 63B 4P 63 A 25 kA TM-D Fixed Moulded Case Circuit Breaker

Schneider Electric's C11B6TM063B is a 4-pole ComPacT NSXm 63B moulded case circuit breaker rated 63 A, delivering 25 kA breaking capacity (Icu) at 415 V AC and a 690 V AC operational voltage (Ue). Its TM-D thermal-magnetic trip unit pairs adjustable overload protection with a fixed 800 A instantaneous short-circuit trip, fixed-mounted for low-voltage distribution boards.

Technical Specifications

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

The B performance level delivers 25 kA Icu at 380/415 V AC, the compact-frame rating of the ComPacT NSXm range — sized for final distribution circuits rather than incomers. Everlink spring-clamp auxiliary connections and DIN-rail or plate mounting are built in. Its TM-D thermal-magnetic trip unit combines the LI protection set in one block: L is the overload (thermal) function, adjustable 0.7–1 × In, and I is the short-circuit (magnetic) function, fixed at 800 A — so no separate instantaneous relay is needed. The fourth (neutral) pole is unprotected (3D), so a separate neutral overcurrent device is needed if the installation requires neutral protection. Within the same NSXm 63B frame, pick the 63 A trip rating to match the protected circuit's full-load current — lower- and higher-current variants share the same breaking capacity and enclosure footprint.