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Schneider Electric C11B4TM050B — Miniature Circuit Breakers (MCB)

Schneider Electric C11B4TM050B ComPacT NSXm, 50 A, 25 kA 415

MPNC11B4TM050B
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Schneider Electric ComPacT NSXm, 4P circuit breaker, 50 A TM-D trip unit, 25 kA at 415 V AC, grey (RAL 7016).

Schneider Electric C11B4TM050B datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C11B4TM050B — Identification
ParameterValue
Product nameComPacT NSXm
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C11B4TM050B — Ratings
ParameterValue
Rated current (In)50 A at 40 °C
Poles configuration4P
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
C11B4TM050B — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to IEC 60947-2
Electrical durability (cycles)20000 cycles at 440 V In/2 10000 cycles at 440 V In 10000 cycles at 690 V In/2 5000 cycles at 690 V In
Mechanical durability (cycles)20000 cycles
C11B4TM050B — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
Local signalling/indicationFlag (green) for presence of auxiliary contacts
Number of 9 mm pitches12 module
C11B4TM050B — 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 %
C11B4TM050B — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C11B4TM050B — Electrical
ParameterValue
[Icu] rated ultimate short-circuit breaking capacity50 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 10 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2
[Ics] rated service short-circuit breaking capacity50 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 10 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2
C11B4TM050B — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The 4-pole (4P) configuration switches all three phases plus the neutral, with the neutral on the left side.

Where it is used and how it integrates

The 108 mm width (12 module pitches at 9 mm) fits standard distribution panel cutouts. IP40 enclosure protection means it is suited for indoor panel installation where tools are required to access live parts; not for washdown or outdoor use. The breaker includes a flag (green) on the front to indicate presence of auxiliary contacts — a quick visual check during commissioning. Connection pitch is 35 mm with spreaders, 27 mm without, so busbar selection depends on whether spreaders are used. The toggle control is manual; no motor operator or remote trip is built in.

Frequently asked questions

How do I get current pricing and availability for C11B4TM050B?

The C11B4TM050B is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the closest alternative to C11B4TM050B in this family?

Within the ComPacT NSXm range, the closest alternative would be a different trip-unit rating (e.g., 63 A TM-D) or a higher breaking capacity variant (performance level S or H) — but the 50 A TM-D at 25 kA is a standard configuration; no direct pin-compatible substitute exists without changing the trip rating or breaking capacity.

What compliance documentation does this brand provide for C11B4TM050B?

The breaker is certified to EN/IEC 60947-2 and carries suitability for isolation per that standard. The manufacturer provides a declaration of conformity and test reports; RoHS and REACH compliance documentation is available from the manufacturer upon request.

MPN
C11B4TM050B