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Schneider Electric C40W42D400 — Miniature Circuit Breakers (MCB)

Schneider C40W42D400 ComPacT NSX MCCB, 4-pole, 400 A, 100 kA

MPNC40W42D400
Obsolete

Schneider C40W42D400 Compact Nsx, New Generation — now discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.

$1,149.58 – $1,737.60Ref. price · indicative, final on quote
Schneider Electric C40W42D400 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C40W42D400 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40W42D400 — Ratings
ParameterValue
Rated current (In)400 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
C40W42D400 — 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
C40W42D400 — 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
C40W42D400 — 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 %
C40W42D400 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40W42D400 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range160...400 A
Trip unit protection functionsLSoI

Product details

Overview

The C40W42D400 is a Schneider ComPacT NSX molded case circuit breaker with 4 poles, rated 400 A at 40 °C, and a breaking capacity of 100 kA at 690 V AC. It carries a MicroLogic 2.3 electronic trip unit providing L, So, and I protection for distribution applications. The fixed-mount design uses a toggle control and complies with EN/IEC 60947-2.

Comparison with C40F4

Compared to the C40F4, the C40W42D400 shares the same 4-pole count and 400 A rating but delivers a higher breaking capacity: 100 kA versus 85 kA at 690 V AC. The C40W42D400 also includes a MicroLogic 2.3 electronic trip unit with L, So, and I protection, whereas the C40F4 is a basic frame without integrated protection. This makes the C40W42D400 suitable for applications requiring higher fault current withstand and selective coordination.

MPN
C40W42D400