Schneider Electric C12F6TM125B ComPacT NSXm160F 4P 125 A 36 kA TM-D Fixed Moulded Case Circuit Breaker

The C12F6TM125B is a 4-pole (3D, neutral unprotected) Schneider Electric ComPacT NSXm160F moulded case circuit breaker rated 125 A, built around a TM-D thermal-magnetic trip unit with 36 kA breaking capacity (Icu) at 380/415 V AC. Rated operational voltage (Ue) is 440 V AC. At 108 x 137 x 80 mm it adds a fourth pole to the compact NSXm160F frame for distribution boards that switch the neutral.

Technical Specifications

Certifications & Standards

• EN/IEC 60947-2

Selection Notes

Because the C12F6TM125B is a 3D breaker, the fourth pole switches the neutral conductor but carries no overload or short-circuit protection of its own — it is a switched-neutral, not a protected-neutral, device. The 125 A thermal setting is fixed by the trip-unit rating but remains adjustable down to 0.7 x In, so it can be tuned below the frame's 160 A ceiling without stepping up to the TM160 variant. Choose the TM160 version of this same 36 kA/4P frame when the downstream load needs the full 160 A.