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Schneider Electric C10B3TM040C — Miniature Circuit Breakers (MCB)

C10B3TM040C ComPacT NSX100B 40A 3P Thermal-Magnetic Breaker,

MPNC10B3TM040C
Active

Schneider Electric ComPacT NSX100B, C10B3TM040C, 3-pole 40 A thermal-magnetic circuit breaker, TM-D trip unit, 25 kA Icu at 415 V AC, IP40, backplate mount.

Schneider Electric C10B3TM040C datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C10B3TM040C — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C10B3TM040C — Ratings
ParameterValue
Rated current (In)40 A at 50 °C
Poles configuration3P
Breaking capacity40 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 15 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)40 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 25 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 20 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 7 kA at 500 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
C10B3TM040C — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)50000 cycles at 440 V In/2 30000 cycles at 440 V In 20000 cycles at 690 V In/2 10000 cycles at 690 V In
Mechanical durability (cycles)50000 cycles
C10B3TM040C — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C10B3TM040C — 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 %
C10B3TM040C — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C10B3TM040C — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The C10B3TM040C is a 3-pole ComPacT NSX100B circuit breaker with a 40 A thermal-magnetic TM-D trip unit. Breaking capacity is 25 kA Icu at 380/415 V AC, 50/60 Hz — that's the fault current it can safely interrupt at typical European line voltage. At 240 V it handles 40 kA, and at 440 V it's still rated for 20 kA. Thermal-magnetic means the overload curve is fixed — no interchangeable rating plugs or electronic adjustment. For a 40 A feeder protecting a motor circuit or a sub-distribution board, this is a straightforward, reliable choice.

Mounting and integration into a panel

The 105 mm width, 161 mm height, and 86 mm depth fit standard ComPacT NSX cutouts. Rated IP40, IK07 — protected against tools and small solids, but not washdown. Suitable for indoor panel installation where the breaker isn't exposed to moisture or dust ingress.

Frequently asked questions

What is the breaking capacity of C10B3TM040C at 415 V?

25 kA Icu at 380/415 V AC, 50/60 Hz, per IEC 60947-2. At 240 V it's 40 kA, and at 440 V it's 20 kA.

What trip unit does C10B3TM040C use?

A 40 A thermal-magnetic TM-D trip unit. It provides fixed L (thermal overload) and I (magnetic short-circuit) protection — no interchangeable rating plugs or electronic adjustment.

Where can I buy C10B3TM040C and what is the lead time?

We source this part to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price.

MPN
C10B3TM040C