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Schneider Electric C25W3TM125 — Miniature Circuit Breakers (MCB)

Schneider Electric C25W3TM125 ComPacT NSX 125A 3P Thermal-Ma

MPNC25W3TM125
Active

Schneider Electric ComPacT NSX, circuit breaker, 125 A at 40 °C, 3P, TM-D thermal-magnetic trip unit, 100 kA Icu at 500 V AC, backplate mount, IP40.

$6.42Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C25W3TM125 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C25W3TM125 — Ratings
ParameterValue
Rated current (In)125 A at 40 °C
Poles configuration3P
Breaking capacity100 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 100 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 100 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)100 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2 100 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 100 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
C25W3TM125 — 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
C25W3TM125 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C25W3TM125 — 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 %
C25W3TM125 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C25W3TM125 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The 3-pole design (3P) and 100 kA Icu at 500 V AC (50/60 Hz) per IEC 60947-2 mean it can safely interrupt fault currents up to 100 kA without upstream cascading — critical for high-fault-capacity distribution panels where selectivity with upstream devices is required. The thermal-magnetic trip provides L (overload) and I (short-circuit) protection in one unit, so you get both time-delayed thermal response and instantaneous magnetic trip without a separate relay. Rated for 125 A continuous at 40 °C. Breaking capacity holds at 100 kA Icu across 500 V, 525 V, and 660/690 V AC. IP40 front face and IK07 impact resistance suit indoor panel environments where accidental tool drops or panel-door impacts are a risk.

Sourcing and lifecycle — what to expect when you order

IP40 and IK07 ratings are factory-tested per IEC 60529 and IEC 62262 respectively.

Connection pitch is 35 mm. Mechanical durability is rated at 20,000 cycles; electrical durability varies by load: 20,000 cycles at 440 V at half rated current (In/2), 10,000 cycles at 440 V at full In, and 5,000 cycles at 690 V at full In. The toggle control is manual only — no motor operator or shunt trip is integrated in this base variant.

Frequently asked questions

What is C25W3TM125's breaking capacity at 690 V?

100 kA Icu at 660/690 V AC 50/60 Hz per IEC 60947-2. The HB2 code confirms 100 kA at 690 V.

MPN
C25W3TM125