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Schneider Electric C16B4TM125C — Miniature Circuit Breakers (MCB)

C16B4TM125C ComPacT NSX160B MCCB, 125 A, 25 kA at 415 V

MPNC16B4TM125C
Active

Schneider Electric ComPacT NSX160B, 4P, 125 A, thermal-magnetic TM-D trip unit, 25 kA Icu at 415 V AC, toggle control, IP40, EN/IEC 60947-2.

Schneider Electric C16B4TM125C datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C16B4TM125C — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C16B4TM125C — Ratings
ParameterValue
Rated current (In)125 A at 50 °C
Poles configuration4P
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 15 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
C16B4TM125C — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)40000 cycles at 440 V In/2 20000 cycles at 440 V In 15000 cycles at 690 V In/2 7500 cycles at 690 V In
Mechanical durability (cycles)40000 cycles
C16B4TM125C — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C16B4TM125C — 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 %
C16B4TM125C — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C16B4TM125C — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

The C16B4TM125C is a Schneider Electric ComPacT NSX160B moulded-case circuit breaker, 4-pole, rated 125 A at 50 °C with a TM-D thermal-magnetic trip unit. The TM-D provides fixed overload (L) and short-circuit (I) protection — no adjustment dials, so the trip curve is set at the factory for distribution duty. The 25 kA Icu at 415 V AC (40 kA at 240 V) is the interrupting rating under IEC 60947-2; at 415 V it clears a 25 kA fault without damage to the breaker, which is the figure that governs selectivity coordination in a 400 V panel. The 125 A frame means it fits as a main or feeder breaker in a distribution board, not a motor-protective device — utilisation category A confirms it is not intended for frequent switching of motor starts.

Deployment context

The IP40 enclosure is suitable for dry indoor panels; the IK07 impact rating means it withstands light tool drops during installation.

MPN
C16B4TM125C