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Schneider Electric C12H6TM125B — Miniature Circuit Breakers (MCB)

Schneider C12H6TM125B ComPacT NSXm MCCB, 125A 4P 70kA

MPNC12H6TM125B
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Schneider Electric ComPacT NSXm, C12H6TM125B, 4P MCCB, 125 A TM-D trip, 70 kA at 415 V AC, IP40, grey (RAL 7016).

Schneider Electric C12H6TM125B datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C12H6TM125B — Identification
ParameterValue
Product nameComPacT NSXm
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C12H6TM125B — Ratings
ParameterValue
Rated current (In)125 A at 40 °C
Poles configuration4P
Rated operational voltage (Ue)440 V AC 50/60 Hz
Rated insulation voltage (Ui)800 V AC 50/60 Hz
Rated impulse withstand voltage (Uimp)8 kV
Network type (AC/DC)AC
Network frequency50/60 Hz
Utilisation categoryCategory A
Overvoltage categoryIII
C12H6TM125B — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to IEC 60947-2
Electrical durability (cycles)20000 cycles at 440 V In/2 10000 cycles at 440 V In
Mechanical durability (cycles)20000 cycles
C12H6TM125B — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlag (green) for presence of auxiliary contacts
Number of 9 mm pitches12 module
C12H6TM125B — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-50...85 °C
IP degree of protectionIP40 conforming to IEC 60529
Pollution degree3 conforming to IEC 60664-1
Relative humidity0...95 %
C12H6TM125B — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C12H6TM125B — Electrical
ParameterValue
[Icu] rated ultimate short-circuit breaking capacity100 kA Icu at 220...240 V AC 50/60 Hz conforming to IEC 60947-2 70 kA Icu at 380...415 V AC 50/60 Hz conforming to IEC 60947-2 65 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2
[Ics] rated service short-circuit breaking capacity100 kA at 220...240 V AC 50/60 Hz conforming to IEC 60947-2 70 kA at 380...415 V AC 50/60 Hz conforming to IEC 60947-2 65 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2
C12H6TM125B — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

Mounts to a backplate, front-connected top and bottom, compression lug or busbar terminations.

Category A utilisation (no intentional short-time delay) so it trips instantaneously on fault; selectivity with downstream breakers relies on the I²t let-through of the TM-D curve, not a delayed trip. 20 000 electrical cycles at 440 V at half rated current, 10 000 at full rated current — that is the endurance for a main breaker that sees infrequent switching.

Backplate-mounted, horizontal or vertical orientation. 12 module pitches at 9 mm each — 108 mm wide, 137 mm high, 80 mm deep. Connection pitch 35 mm with spreaders, 27 mm without. Neutral on the left. IP40 enclosure protection, IK07 impact resistance. Suitability for isolation per IEC 60947-2 — the flag indicator shows auxiliary contact presence.

Frequently asked questions

What is the breaking capacity of C12H6TM125B?

70 kA at 415 V AC — the H performance level per the ComPacT NSXm range.

What standards does C12H6TM125B comply with?

EN/IEC 60947-2 for circuit-breakers, with suitability for isolation per that standard. Pollution degree 3 per IEC 60664-1.

How do I get pricing and availability for C12H6TM125B?

Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

MPN
C12H6TM125B