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Schneider Electric C25N4TM125C — Miniature Circuit Breakers (MCB)

Schneider Electric C25N4TM125C ComPacT NSX 125A 4P MCCB, 50

MPNC25N4TM125C
Obsolete

Schneider Electric ComPacT NSX, circuit breaker, 125 A, 4P, TM-D thermal-magnetic trip unit, 50 kA Icu at 415 V AC, EN/IEC 60947-2.

Schneider Electric C25N4TM125C datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C25N4TM125C — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C25N4TM125C — Ratings
ParameterValue
Rated current (In)125 A at 50 °C
Poles configuration4P
Breaking capacity90 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 36 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 35 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)90 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 36 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2 35 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 kA at 660/690 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
C25N4TM125C — 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
C25N4TM125C — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C25N4TM125C — 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 %
C25N4TM125C — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C25N4TM125C — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

It's designed for distribution applications and carries a 50 kA Icu breaking capacity at 415 V AC (N breaking capacity code), with higher ratings at lower voltages — 90 kA at 240 V AC and 36 kA at 500 V AC. The TM-D trip provides L (thermal overload) and I (magnetic short-circuit) protection, with the neutral protection set to 1 x Ir (4D).

At 690 V AC the breaker still interrupts 10 kA, which covers most industrial step-down transformer secondaries. The 20,000 electrical cycles at 440 V at half-rated current and 10,000 cycles at full rated current give a solid service life for a main or feeder breaker.

Environmental and installation constraints

IP40 enclosure protection and IK07 impact resistance suit it for clean indoor panels. Overvoltage category III covers fixed-installation distribution boards. Operating altitude is 0–2000 m without derating; above that, derate per the manufacturer's curve. Relative humidity range is 0–95%.

Frequently asked questions

Where can I buy C25N4TM125C and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is C25N4TM125C's breaking capacity at 415 V?

It delivers 50 kA Icu at 380/415 V AC 50/60 Hz per IEC 60947-2, which is the N breaking capacity code for this frame size.

What compliance documentation does this brand provide for C25N4TM125C?

The breaker is certified to EN/IEC 60947-2 and carries an isolation suitability marking per that standard. Pollution degree 3 per IEC 60664-1 and overvoltage category III are specified. Specific RoHS/REACH/UL documentation should be confirmed at quote time from the supplier.

MPN
C25N4TM125C