Schneider Electric C12F3TM125B ComPacT NSXm 160F 3P 125 A 36 kA TM-D Fixed Moulded Case Circuit Breaker

The Schneider Electric C12F3TM125B is a 3P ComPacT NSXm 160F moulded case circuit breaker rated 125 A at 40°C, built on a TM-D thermal-magnetic trip unit with 36 kA breaking capacity (Icu) at 380/415 V AC. It is a fixed-mounting device with front compression lug or busbar connection for low-voltage distribution circuits up to 440 V AC.

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

Choose the F performance level (36 kA Icu at 380/415 V AC) when the prospective short-circuit current at the installation point stays at or below that rating; move to the lower-breaking-capacity B version or the higher-breaking-capacity N version in the same NSXm frame if the fault-level study gives a different result. The TM-D trip unit has a fixed long-time delay with pickup adjustable over 0.7...1 x In range and a fixed instantaneous pickup at 1250 A, so downstream coordination relies on current discrimination rather than time grading.