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Schneider Electric C40F3TM320D — Miniature Circuit Breakers (MCB)

C40F3TM320D ComPacT NSX DC 320A 36kA 750VDC MCCB

MPNC40F3TM320D
Active

Schneider Electric ComPacT NSX DC, C40F3TM320D, 320A thermal-magnetic MCCB, 36kA Icu at 750VDC 3-pole series, IEC 60947-2.

$955.68 – $1,187.19Ref. price · indicative, final on quote
Schneider Electric C40F3TM320D datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C40F3TM320D — Identification
ParameterValue
Product nameComPacT NSX DC
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40F3TM320D — Ratings
ParameterValue
Rated current (In)320 A at 40 °C
Poles configuration3P
Breaking capacity36 kA Icu at 24...125 V DC 1 pole conforming to IEC 60947-2 36 kA Icu at 250 V DC 1 pole conforming to IEC 60947-2 36 kA Icu at 500 V DC 2 poles in series conforming to IEC 60947-2 36 kA Icu at 750 V DC 3 poles in series conforming to IEC 60947-2
Rated service breaking capacity (Ics)36 kA at 24...125 V DC conforming to IEC 60947-2 36 kA at 250 V DC conforming to IEC 60947-2 36 kA at 500 V DC conforming to IEC 60947-2 36 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
C40F3TM320D — 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
C40F3TM320D — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C40F3TM320D — 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 %
C40F3TM320D — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40F3TM320D — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

DC-rated MCCB for 750 V distribution

Breaking capacity is 36 kA Icu across the DC voltage range: 24...125 V DC 1-pole, 250 V DC 1-pole, 500 V DC 2-poles in series, and 750 V DC 3-poles in series — all per IEC 60947-2. Rated insulation voltage is 750 V DC (IEC 60947-2), pollution degree 3, and the breaker is suitable for isolation — so it doubles as a visible disconnect in a DC circuit.

Fixed backplate mount, accepts horizontal or vertical orientation. Front connections top and bottom, 45 mm connection pitch. IP40 front face, IK07 impact resistance. Six accessory slots allow add-on shunt trips, auxiliary contacts, or motor operators without changing the breaker footprint.

Marked as current production. EN/IEC 60947-2 certified. No earth-leakage protection module integrated (external RCD required if needed).

Frequently asked questions

What is C40F3TM320D's breaking capacity at 750 V DC?

36 kA Icu with 3 poles in series per IEC 60947-2.

What standards does C40F3TM320D comply with?

EN/IEC 60947-2. Pollution degree 3 per IEC 60664-1. Suitable for isolation per the same standard.

Where can I buy C40F3TM320D?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

MPN
C40F3TM320D