The C125N45EFM is a Schneider Electric ComPacT NS new generation 4-pole moulded-case circuit breaker with a MicroLogic 5.0 E electronic trip unit, rated 1250 A at 50 °C. The MicroLogic 5.0 E provides L (long-time overload), S (short-time short-circuit), and I (instantaneous) protection curves, plus an integrated energy meter for distribution monitoring. The 85 kA Icu at 220/240 V AC and 50 kA Icu at 415 V AC (per IEC 60947-2) define the maximum fault current the breaker can safely interrupt without damage — critical for verifying SCCR coordination in the panel. With IP40 protection and IK07 impact rating, it suits indoor switchboard mounting where dust and light mechanical contact are expected, but not washdown environments.
C125N45EFM ComPacT NS 1250A 4P MCCB, MicroLogic 5.0 E, 85 kA
MPNC125N45EFM
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Schneider Electric ComPacT NS new generation, C125N45EFM, 4-pole MCCB, 1250 A at 50 °C, MicroLogic 5.0 E electronic trip unit, 85 kA Icu at 220/240 V AC, fixed mount, front connection.
$3,381.39Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product name | ComPacT NS new generation |
| Product range | ComPacT |
| Product range (series) | ComPacT NS630b...1600 new generation |
| Product/component type | Circuit breaker |
| Device application | Distribution |
| Parameter | Value |
|---|---|
| Rated current (In) | 1250 A at 50 °C |
| Breaking capacity | 85 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 40 kA Icu at 500/525 V AC 50/60 Hz conforming to IEC 60947-2 30 kA Icu at 660/690 V AC 50/60 Hz conforming to IEC 60947-2 |
| Rated service breaking capacity (Ics) | 50 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 50 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 40 kA at 500/525 V AC 50/60 Hz conforming to IEC 60947-2 30 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 conforming to IEC 60947-2 |
| Rated impulse withstand voltage (Uimp) | 8 kV conforming to IEC 60947-2 |
| Network type (AC/DC) | AC |
| Network frequency | 50/60 Hz |
| Utilisation category | Category B |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Trip unit technology | Electronic |
| Earth-leakage protection | Without |
| Suitability for isolation | Yes conforming to EN/IEC 60947-2 |
| Electrical durability (cycles) | 2000 cycles at 690 V In 3000 cycles at 690 V In/2 4000 cycles at 440 V In 5000 cycles at 440 V In/2 |
| Mechanical durability (cycles) | 10000 cycles |
| Parameter | Value |
|---|---|
| Mounting support | Backplate |
| Mounting mode | Fixed |
| Control type | Manually operated |
| Local signalling/indication | 4 LEDs (red) for fault indication 1 LED (yellow) for overload |
| Parameter | Value |
|---|---|
| Operating ambient temperature | -25...70 °C |
| Storage ambient temperature | -40...85 °C |
| IP degree of protection | IP40 conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60947 |
| Relative humidity | 0...95 % |
| Parameter | Value |
|---|---|
| Standards | EN/IEC 60947-2 |
| Parameter | Value |
|---|---|
| [Ir] long-time protection pick-up adjustment range | 0.4...1 x In |
| Trip unit protection functions | LSI |
Product details
Frequently asked questions
What are the key ratings of C125N45EFM?
Rated 1250 A at 50 °C, 4-pole, MicroLogic 5.0 E trip unit with LSI protection, breaking capacity 85 kA Icu at 220/240 V AC and 50 kA Icu at 415 V AC, IP40, IK07.
What standards does C125N45EFM comply with?
It complies with EN/IEC 60947-2 for circuit-breaker performance and safety.
MPN
C125N45EFM