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Schneider Electric C40F31M320 — Miniature Circuit Breakers (MCB)

Schneider Electric C40F31M320 ComPacT NSX400F 3P 320A Motor

MPNC40F31M320
Active

Schneider Electric ComPacT NSX, NSX400F, 3P, 320 A at 65 °C, MicroLogic 1.3 M electronic trip unit, 36 kA Icu at 415 V AC, motor protection.

$656.70Ref. price · indicative, final on quote
Schneider Electric C40F31M320 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

C40F31M320 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationMotor protection
C40F31M320 — Ratings
ParameterValue
Rated current (In)320 A at 65 °C
Poles configuration3P
Breaking capacity40 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 36 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 30 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 25 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 20 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2 85 kA Icu at 240 V AC 50/60 Hz conforming to UL 60947-4-1 35 kA Icu at 480 V AC 50/60 Hz conforming to UL 60947-4-1 20 kA Icu at 600 V AC 50/60 Hz conforming to UL 60947-4-1
Rated service breaking capacity (Ics)40 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 36 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 30 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 25 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2 10 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 10 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
C40F31M320 — 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
C40F31M320 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlashing LED (green) for ready to operate
C40F31M320 — 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 %
C40F31M320 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40F31M320 — Specifications
ParameterValue
Trip unit protection functionsSI

Product details

The Schneider Electric C40F31M320 is a ComPacT NSX400F motor circuit breaker, 3-pole, rated 320 A at 65 °C, with a MicroLogic 1.3 M electronic trip unit. It's built for motor protection in industrial power distribution, meeting EN/IEC 60947-2.

The MicroLogic 1.3 M trip unit provides electronic short-time (S) and instantaneous (I) protection, tailored for motor starting inrush. The 320 A rating at 65 °C gives you headroom in a warm panel — no derating panic if the ambient climbs. Breaking capacity steps from 40 kA at 240 V down to 10 kA at 690 V AC; at 480 V AC it's 35 kA per UL 60947-4-1, which covers most North American motor branch circuits.

IK07 impact rating handles the odd dropped tool.

Electrical durability: 12,000 cycles at 440 V at half rated current, 6,000 at full load. Mechanical life is 15,000 cycles.

Frequently asked questions

What is C40F31M320's listed range?

The range is ComPacT, specifically the ComPacT NSX series.

MPN
C40F31M320