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Schneider Electric C12H3TM125L — Miniature Circuit Breakers (MCB)

Schneider Electric C12H3TM125L ComPacT NSXm, 125 A, 70 kA

MPNC12H3TM125L
Active

Schneider Electric ComPacT NSXm, C12H3TM125L, 3-pole circuit breaker, 125 A thermal-magnetic trip, 70 kA at 415 V AC, IP40, grey (RAL 7016).

$233.82 – $347.78Ref. price · indicative, final on quote
Schneider Electric C12H3TM125L datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C12H3TM125L — Identification
ParameterValue
Product nameComPacT NSXm
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C12H3TM125L — Ratings
ParameterValue
Rated current (In)125 A at 40 °C
Poles configuration3P
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
C12H3TM125L — 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
C12H3TM125L — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlag (green) for presence of auxiliary contacts
Number of 9 mm pitches9 module
C12H3TM125L — 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 %
C12H3TM125L — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C12H3TM125L — 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
C12H3TM125L — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The C12H3TM125L is a 3-pole ComPacT NSXm circuit breaker with a 125 A thermal-magnetic trip unit (TM-D) rated at 40 °C. The thermal-magnetic trip gives you an inverse-time curve for overloads plus instantaneous magnetic protection for short circuits, so it handles both motor-start inrush and distribution feeder duty in one device.

Mounts flat on a backplate in horizontal or vertical orientation — no DIN-rail adapter needed. The front-facing terminals accept Everlink lugs for 2.5–70 mm² flexible copper or 2.5–95 mm² rigid/stranded copper, with a 35 mm connection pitch (27 mm without spreaders). The 9-module pitch (81 mm wide, 137 mm high, 80 mm deep) fits standard distribution board cutouts.

Frequently asked questions

What is the breaking capacity of C12H3TM125L?

70 kA at 415 V AC (performance level H), which means it can safely interrupt fault currents up to that level without upstream damage.

What compliance documentation does this brand provide for C12H3TM125L?

The breaker is certified to EN/IEC 60947-2, rated for isolation per that standard, and carries pollution degree 3 and overvoltage category III ratings per IEC 60664-1. RoHS, REACH, and UL documentation are typically available from the manufacturer upon request.

Where can I buy C12H3TM125L and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.

MPN
C12H3TM125L