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Schneider Electric C40W31M320 — Miniature Circuit Breakers (MCB)

Schneider C40W31M320 ComPacT NSX MCCB, 320 A, 100 kA, 3-pole

MPNC40W31M320
Active

Schneider C40W31M320 Compact Nsx, New Generation — now discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.

$13.75Ref. price · indicative, final on quote
Schneider Electric C40W31M320 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jun 2026

Specifications

C40W31M320 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationMotor protection
C40W31M320 — Ratings
ParameterValue
Rated current (In)320 A at 65 °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
C40W31M320 — 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
C40W31M320 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlashing LED (green) for ready to operate
C40W31M320 — 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 %
C40W31M320 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40W31M320 — Specifications
ParameterValue
Trip unit protection functionsSI

Product details

Overview

The C40W31M320 is a Schneider ComPacT NSX molded case circuit breaker rated 320 A with a 100 kA breaking capacity at 690 V AC, 3-pole, fitted with a MicroLogic 1.3 M electronic trip unit for motor protection. It is an active, current-production part in the ComPacT NSX new generation line, available through standard distribution channels.

Schneider lists the C40W31M320 as an active part with no end-of-life notice. It is in current production and available through normal supply channels. For firm pricing and lead time, submit an RFQ; the part is typically stocked by major distributors and ships within standard lead times for the ComPacT NSX range.

MPN
C40W31M320