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Schneider Electric C40S3TM320D — Miniature Circuit Breakers (MCB)

Schneider C40S3TM320D ComPacT NSX DC circuit breaker, 320 A, 3-pole

MPNC40S3TM320D
Active

Schneider C40S3TM320D Compact For Dc Networks, New Generation — now discontinued, supplied from remaining surplus and broker stock.

$1,689.05Ref. price · indicative, final on quote
Schneider Electric C40S3TM320D datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jun 2026

Specifications

C40S3TM320D — Identification
ParameterValue
Product nameComPacT NSX DC
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40S3TM320D — Ratings
ParameterValue
Rated current (In)320 A at 40 °C
Poles configuration3P
Breaking capacity100 kA Icu at 24...125 V DC 1 pole conforming to IEC 60947-2 100 kA Icu at 250 V DC 1 pole conforming to IEC 60947-2 100 kA Icu at 500 V DC 2 poles in series conforming to IEC 60947-2 100 kA Icu at 750 V DC 3 poles in series conforming to IEC 60947-2
Rated service breaking capacity (Ics)100 kA at 24...125 V DC conforming to IEC 60947-2 100 kA at 250 V DC conforming to IEC 60947-2 100 kA at 500 V DC conforming to IEC 60947-2 100 kA at 750 V DC conforming to IEC 60947-2
Rated operational voltage (Ue)750 V DC
Rated insulation voltage (Ui)750 V DC conforming to IEC 60947-2
Rated impulse withstand voltage (Uimp)8 kV conforming to IEC 60947-2
Network type (AC/DC)DC
Utilisation categoryCategory A
C40S3TM320D — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)2000 cycles at 750 V In/2 1000 cycles at 750 V In
Mechanical durability (cycles)5000 cycles
C40S3TM320D — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C40S3TM320D — 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 %
C40S3TM320D — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40S3TM320D — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

Overview

The C40S3TM320D is a Schneider ComPacT NSX DC molded case circuit breaker rated 320 A at 40 °C on a 750 V DC network, with a 100 kA breaking capacity and a thermal-magnetic LI trip unit. It is a 3-pole fixed-mount unit with toggle control, sealed to IP40, and carries the EN/IEC 60947-2 standard for DC distribution.

MPN
C40S3TM320D