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Schneider Electric C25B6TM125 — Miniature Circuit Breakers (MCB)

C25B6TM125 ComPacT NSX 125A, 25kA 415V AC MCCB

MPNC25B6TM125
Active

Schneider Electric ComPacT NSX, NSX250B, 125 A thermal-magnetic MCCB, 4-pole, 25 kA Icu at 415 V AC, TM-D trip unit, toggle control, backplate mount.

$293.90Ref. price · indicative, final on quote
Schneider Electric C25B6TM125 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

C25B6TM125 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeCircuit breaker
Device applicationDistribution
C25B6TM125 — Ratings
ParameterValue
Rated current (In)125 A at 40 °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
C25B6TM125 — Protection
ParameterValue
Trip unit technologyThermal-magnetic
Earth-leakage protectionWithout
Suitability for isolationYes conforming to EN/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
C25B6TM125 — Mechanical
ParameterValue
Mounting supportBackplate
Control typeToggle
C25B6TM125 — 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 %
C25B6TM125 — Approvals
ParameterValue
StandardsEN/IEC 60947-2
C25B6TM125 — Specifications
ParameterValue
[Ir] long-time protection pick-up adjustment range0.7...1 x In
Trip unit protection functionsLI

Product details

It is a 4-pole breaker (4P) with toggle control, designed for distribution applications per EN/IEC 60947-2.

Breaking capacity across common voltages

This breaker's interrupting capacity varies with system voltage: 40 kA Icu at 240 V AC, 25 kA at 415 V AC, 20 kA at 440 V AC, and 15 kA at 500 V AC. The 25 kA at 415 V AC is the rating most often quoted for European 400 V distribution; the 40 kA at 240 V AC covers North American 240/120 V split-phase or 240 V delta services.

Mounts on a backplate — no DIN rail here, so plan for a panel cutout or mounting bracket. It can be installed horizontally or vertically, flat on the backplate. The connection pitch is 35 mm, and both line and load connections are front-facing, which keeps wiring accessible inside the enclosure. IP40 protection means it is okay for clean indoor panels but not washdown areas or dusty environments.

Frequently asked questions

What is the closest pin-compatible alternative to C25B6TM125 in this component family?

Within the ComPacT NSX family, the closest alternative would be a different trip-unit rating or a higher/lower interrupting-capacity frame (e.g., NSX160B or NSX100B with the same TM-D trip technology). The C25B6TM125 is a specific combination of 125 A, 4-pole, 25 kA at 415 V AC, and toggle control — any substitution must match the frame size, pole count, and interrupting rating for the application.

What is C25B6TM125's listed range (ComPacT) on this component line?

The C25B6TM125 belongs to the Schneider Electric ComPacT range, specifically the ComPacT NSX series of molded-case circuit breakers.

What is C25B6TM125's listed depth (d) (86 mm) on this component line?

The C25B6TM125 has a depth of 86 mm. That is the front-to-back dimension including the toggle handle — important for enclosure depth planning.

What compliance documentation does this brand provide for C25B6TM125 (RoHS, REACH, UL, IEC)?

The C25B6TM125 is certified to EN/IEC 60947-2 for circuit-breaker performance. It carries an IP40 ingress rating per IEC 60529 and an IK07 impact rating per IEC 62262. It is suitable for isolation per EN/IEC 60947-2. For RoHS/REACH declarations and UL listing status (if applicable), request the compliance documentation with your RFQ — those are typically provided by the manufacturer at order time.

MPN
C25B6TM125