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Schneider Electric C40H4TM400 — Miniature Circuit Breakers (MCB)

C40H4TM400 ComPacT NSX400H 400A Thermal-Magnetic Circuit Bre

MPNC40H4TM400
Active

Schneider Electric ComPacT NSX series, NSX400H, 4-pole thermal-magnetic circuit breaker, 400 A rated at 40 °C, 100 kA Icu at 240 V AC.

Schneider Electric C40H4TM400 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C40H4TM400 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40H4TM400 — Ratings
ParameterValue
Rated current (In)400 A at 40 °C
Poles configuration4P
Breaking capacity100 kA Icu at 220/240 V AC 50/60 Hz conforming to EN/IEC 60947-2 70 kA Icu at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 65 kA Icu at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA Icu at 500 V AC 50/60 Hz conforming to EN/IEC 60947-2 35 kA Icu at 525 V AC 50/60 Hz conforming to EN/IEC 60947-2 20 kA Icu at 660/690 V AC 50/60 Hz conforming to EN/IEC 60947-2
Rated service breaking capacity (Ics)100 kA at 220/240 V AC 50/60 Hz conforming to EN/IEC 60947-2 70 kA at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 65 kA at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA at 500 V AC 50/60 Hz conforming to EN/IEC 60947-2 11 kA at 525 V AC 50/60 Hz conforming to EN/IEC 60947-2 10 kA at 660/690 V AC 50/60 Hz conforming to EN/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
C40H4TM400 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
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
C40H4TM400 — Mechanical
ParameterValue
Mounting supportBackplate DIN rail
Control typeToggle
Contact position indicatorYes
C40H4TM400 — 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 %
C40H4TM400 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40H4TM400 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In

Product details

The C40H4TM400 is a Schneider Electric ComPacT NSX NSX400H 4-pole thermal-magnetic circuit breaker rated 400 A at 40 °C. It is designed for distribution applications and carries a 100 kA Icu breaking capacity at 220/240 V AC, 70 kA at 380/415 V, and 35 kA at 525 V — all per EN/IEC 60947-2.

The breaking capacity curve matters for selectivity coordination downstream. If your fault-current study shows more than 20 kA available at 690 V, this breaker is not the right choice — step up to the H or L frame. Above 2000 m, derate per the manufacturer's curve. Isolation capability is certified per EN/IEC 60947-2 — a visible gap confirms positive disconnection for LOTO procedures.

Mounts on a backplate or DIN rail. The 185 mm width and 255 mm height fit a standard panel cutout; the 45 mm connection pitch matches busbar systems. IP40 front face protection means it is dust-protected but not washdown-rated — install in an enclosure if the environment is wet or dusty. The toggle control provides manual on/off and trip indication; no auxiliary power required for the trip unit.

Mechanical durability is 15000 cycles; electrical durability is 12000 cycles at 440 V In/2, 6000 cycles at 440 V In. The IK07 impact rating (per IEC 62262) means it withstands a 2 J hammer blow — tough enough for industrial panel doors.

Frequently asked questions

What is C40H4TM400's breaking capacity at 415 V?

70 kA Icu at 380/415 V AC 50/60 Hz per EN/IEC 60947-2. At 440 V it is 65 kA, at 500 V it is 50 kA, and at 690 V it is 20 kA.

What is the closest alternative to C40H4TM400 in the same family?

Within the ComPacT NSX range, the closest sibling is the NSX400B (standard breaking capacity, lower Icu) or NSX400S (higher breaking capacity). The C40H4TM400 sits at the H (high) breaking level — 70 kA at 415 V — which is a common choice for industrial main breakers. The trip unit and frame size are identical; the difference is the interrupting rating.

MPN
C40H4TM400