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Schneider Electric C25N3TM125C — Miniature Circuit Breakers (MCB)

Schneider C25N3TM125C ComPacT NSX250N MCCB, 125 A, 90 kA

MPNC25N3TM125C
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Schneider Electric ComPacT NSX250N, MCCB, 3P, 125 A, TM-D trip unit, 90 kA Icu at 240 V AC, N breaking capacity.

Schneider Electric C25N3TM125C datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C25N3TM125C — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C25N3TM125C — Ratings
ParameterValue
Rated current (In)125 A at 50 °C
Poles configuration3P
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
C25N3TM125C — 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
C25N3TM125C — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C25N3TM125C — 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 %
C25N3TM125C — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C25N3TM125C — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The Schneider Electric C25N3TM125C is a ComPacT NSX250N moulded-case circuit breaker (MCCB) with a 125 A thermal-magnetic TM-D trip unit, three poles protected (3D), and an N breaking capacity code — 50 kA Icu at 415 V AC.

The TM-D trip gives thermal protection for overloads (L) and magnetic protection for short circuits (I); the magnetic pickup is fixed, so coordination studies need that curve from the manufacturer. Breaking capacity is the real selector: 90 kA Icu at 240 V AC, 50 kA at 415 V, and 10 kA at 690 V. At 415 V it handles a 50 kA fault without welding or rupturing — that is the N frame's ceiling. Three-pole, front-connected both sides, toggle control.

Certified to EN/IEC 60947-2. IP40 finger protection, IK07 impact resistance. Electrical durability is 20,000 cycles at 440 V In, 10,000 at 440 V In, and 5,000 at 690 V In — mechanical durability is 20,000 cycles. Power dissipation is 9.45 W per pole.

Frequently asked questions

What compliance documentation does this brand provide for C25N3TM125C?

The breaker is certified to EN/IEC 60947-2 and carries suitability-for-isolation marking per that standard. IP40 and IK07 ratings are per IEC 60529 and IEC 62262 respectively. Standard Schneider documentation includes a datasheet, installation guide, and curve sheets.

MPN
C25N3TM125C