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Schneider Electric C25B3TM125 — Miniature Circuit Breakers (MCB)

Schneider Electric C25B3TM125 ComPacT NSX Circuit Breaker, 1

MPNC25B3TM125
Obsolete

Schneider Electric ComPacT NSX, circuit breaker, 3P, 125 A, thermal-magnetic TM-D trip unit, 25 kA Icu at 415 V AC, EN/IEC 60947-2, IP40, backplate mount.

$230.11Ref. price · indicative, final on quote
Schneider Electric C25B3TM125 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C25B3TM125 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C25B3TM125 — Ratings
ParameterValue
Rated current (In)125 A at 40 °C
Poles configuration3P
Breaking capacity40 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 15 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)40 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 15 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2
Rated operational voltage (Ue)690 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
C25B3TM125 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)20000 cycles at 440 V In/2 10000 cycles at 440 V In 10000 cycles at 690 V In/2 5000 cycles at 690 V In
Mechanical durability (cycles)20000 cycles
C25B3TM125 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C25B3TM125 — 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 %
C25B3TM125 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C25B3TM125 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The C25B3TM125 is a Schneider Electric ComPacT NSX circuit breaker in the NSX250B frame, 3-pole, with a thermal-magnetic TM-D trip unit rated 125 A at 40 °C. The breaking capacity is 25 kA Icu at 380/415 V AC 50/60 Hz per IEC 60947-2 — that is the maximum fault current it can safely interrupt at typical 400 V distribution voltages. At 240 V the rating rises to 40 kA Icu.

Deployment context

The 105 mm width and 161 mm height fit standard MCCB cutouts. Front connections top and bottom simplify bus-bar or cable landing. IP40 enclosure protection means it is suitable for indoor panels where tools are required to access live parts; IK07 impact rating handles light mechanical shock during installation.

Suitable for isolation per that standard (isolating function marked on the device). The part carries no integrated earth-leakage protection; add a Vigi module if ground-fault protection is required.

Frequently asked questions

Where can I buy C25B3TM125 and how do I get a price?

The C25B3TM125 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is C25B3TM125's breaking capacity at 415 V?

25 kA Icu at 380/415 V AC 50/60 Hz per IEC 60947-2. At 240 V it is 40 kA Icu.

What compliance documentation does this brand provide for C25B3TM125?

The breaker is designed to EN/IEC 60947-2 and carries the CE marking for the European market. It is suitable for isolation per that standard. For specific RoHS, REACH, or UL documentation, request the manufacturer's declaration of compliance with your RFQ.

MPN
C25B3TM125