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Schneider Electric C40R42D250 — Miniature Circuit Breakers (MCB)

Schneider Electric C40R42D250 ComPacT NSX 250A 4P 200kA Circ

MPNC40R42D250
Obsolete

Schneider Electric ComPacT NSX, circuit breaker, C40R42D250, 250 A at 40 °C, 4P, 200 kA Icu at 415 V AC, MicroLogic 2.3 electronic trip unit.

$34.53Ref. price · indicative, final on quote
Schneider Electric C40R42D250 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C40R42D250 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C40R42D250 — Ratings
ParameterValue
Rated current (In)250 A at 40 °C
Poles configuration4P
Breaking capacity200 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 200 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 200 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 80 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 65 kA Icu at 525 V AC 50/60 Hz conforming to IEC 60947-2 45 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)200 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 200 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 200 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 80 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2 65 kA at 525 V AC 50/60 Hz conforming to IEC 60947-2 45 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
C40R42D250 — 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
C40R42D250 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload
C40R42D250 — 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 %
C40R42D250 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C40R42D250 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range70...250 A
Trip unit protection functionsLSoI

Product details

The C40R42D250 is a Schneider Electric ComPacT NSX circuit breaker, a 4-pole unit rated 250 A at 40 °C with a MicroLogic 2.3 electronic trip unit.

Protection and trip unit

The MicroLogic 2.3 provides L (long-time overload), So (short-time short-circuit with fixed delay), and I (instantaneous short-circuit) protection.

Mounts on a backplate (flat on the back) in either horizontal or vertical orientation. The 185 mm width and 255 mm height fit standard ComPacT NSX panel cutouts; front connections on both upside and downside simplify busbar or cable routing. IP40 enclosure protection keeps dust out in clean panel environments; IK07 impact rating handles accidental tool drops during maintenance.

Frequently asked questions

What are the key ratings of C40R42D250?

Rated 250 A at 40 °C, 4 poles, with a 200 kA Icu at 415 V AC (also 200 kA at 240 V, 80 kA at 500 V, 65 kA at 525 V, 45 kA at 690 V). The MicroLogic 2.3 electronic trip unit covers L, So, and I protection.

Where can I buy C40R42D250?

Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What compliance documentation does this breaker carry?

Certified to EN/IEC 60947-2, with pollution degree 3 per IEC 60664-1 and overvoltage category III. IP40 and IK07 per IEC 60529 and IEC 62262.

MPN
C40R42D250