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Schneider Electric C40W42D250 — Miniature Circuit Breakers (MCB)

Schneider C40W42D250 ComPacT NSX 4-pole 250 A 100 kA MCCB

MPNC40W42D250
Active

Schneider Electric ComPacT NSX C40W42D250 molded case circuit breaker, 4 poles, 250 A rated current, 100 kA Icu breaking capacity at 690 V AC, MicroLogic 2.3 electronic trip unit, LSoI protection, fixed mount.

$19.73Ref. price · indicative, final on quote
Schneider Electric C40W42D250 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jun 2026

Specifications

C40W42D250 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40W42D250 — Ratings
ParameterValue
Rated current (In)250 A at 40 °C
Poles configuration4P
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
C40W42D250 — Protection
ParameterValue
Trip unit technologyElectronic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)12000 cycles at 440 V In/2 6000 cycles at 440 V In 6000 cycles at 690 V In/2 3000 cycles at 690 V In
Mechanical durability (cycles)15000 cycles
C40W42D250 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload
C40W42D250 — 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 %
C40W42D250 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40W42D250 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range70...250 A
Trip unit protection functionsLSoI

Product details

Overview

The C40W42D250 is a Schneider ComPacT NSX molded case circuit breaker with 4 poles, rated 250 A at 40 °C, and a breaking capacity of 100 kA Icu at 690 V AC. It carries a MicroLogic 2.3 electronic trip unit providing LSoI protection: long-time overload (L), short-time short-circuit with fixed delay (So), and instantaneous short-circuit (I).

MPN
C40W42D250