The C40H45E400 is a fixed-mount ComPacT NSX circuit breaker with a MicroLogic 5.3 E electronic trip unit rated 400 A at 40 °C. It's a 4-pole unit (4P) built for distribution duty in commercial and industrial switchboards, meeting EN/IEC 60947-2. The H breaking capacity code tells you it can handle high fault currents — the exact interrupting rating depends on the system voltage, but this is the frame size for serious feeder or main breaker work. The trip unit is fully electronic — MicroLogic 5.3 E — with an LCD display that shows metered data including total energy consumption. That matters for motor loads or feeders with repetitive inrush. The local signalling includes LEDs for ready, 90 % Ir and 105 % Ir thresholds, so you can see load status at a glance without opening the door.
C40H45E400 ComPacT NSX 400A Circuit Breaker, MicroLogic 5.3
MPNC40H45E400
Active
Schneider Electric ComPacT NSX circuit breaker, C40H45E400, 400 A at 40 °C, 4P, MicroLogic 5.3 E electronic trip unit, fixed mount, EN/IEC 60947.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product name | ComPacT NSX |
| Product range | ComPacT |
| Product/component type | Circuit breaker |
| Device application | Distribution |
| Parameter | Value |
|---|---|
| Rated current (In) | 400 A at 40 °C |
| Poles configuration | 4P |
| Rated operational voltage (Ue) | 690 V AC 50/60 Hz |
| Rated insulation voltage (Ui) | 800 V AC 50/60 Hz conforming to EN/IEC 60947-2 |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Network type (AC/DC) | AC |
| Network frequency | 50/60 Hz |
| Utilisation category | Category A |
| Overvoltage category | Class II |
| Parameter | Value |
|---|---|
| Suitability for isolation | Yes conforming to EN/IEC 60947-2 |
| Electrical durability (cycles) | 12000 cycles 440 V AC 50/60 Hz In/2 conforming to IEC 60947-2 6000 cycles 440 V AC 50/60 Hz In conforming to IEC 60947-2 6000 cycles 690 V AC 50/60 Hz In/2 conforming to IEC 60947-2 3000 cycles 690 V AC 50/60 Hz In conforming to IEC 60947-2 |
| Mechanical durability (cycles) | 15000 cycles |
| Parameter | Value |
|---|---|
| Mounting support | Backplate |
| Mounting mode | Fixed |
| Control type | Toggle Rotary handle Extended rotary handle |
| Terminal connection type | 4 screw type terminals wire size 240 mm² aluminium/copper |
| Local signalling/indication | LED ready LED 90 % Ir LED 105 % Ir |
| Width | 185 mm |
| Height | 255 mm |
| Depth | 110 mm |
| Parameter | Value |
|---|---|
| Operating ambient temperature | -35...70 °C |
| Storage ambient temperature | -40...85 °C |
| IP degree of protection | IP40 conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60664-1 |
| Parameter | Value |
|---|---|
| Standards | EN/IEC 60947 |
| Parameter | Value |
|---|---|
| [Icu] rated ultimate short-circuit breaking capacity | 100 kA Icu at 220/240 V AC 50/60 Hz conforming to EN/IEC 60947-2 70 kA Icu at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 65 kA Icu at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA Icu at 500 V AC 50/60 Hz conforming to EN/IEC 60947-2 35 kA Icu at 525 V AC 50/60 Hz conforming to EN/IEC 60947-2 20 kA Icu at 660/690 V AC 50/60 Hz conforming to EN/IEC 60947-2 |
| [Ics] rated service short-circuit breaking capacity | 100 kA at 220/240 V AC 50/60 Hz conforming to EN/IEC 60947-2 70 kA at 380/415 V AC 50/60 Hz conforming to EN/IEC 60947-2 65 kA at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 50 kA at 500 V AC 50/60 Hz conforming to EN/IEC 60947-2 11 kA at 525 V AC 50/60 Hz conforming to EN/IEC 60947-2 10 kA at 660/690 V AC 50/60 Hz conforming to EN/IEC 60947-2 |
Product details
Frequently asked questions
What is the breaking capacity of C40H45E400?
The breaking capacity code is H (high). The exact kA rating depends on the system voltage — check the specific interrupting rating table for your voltage level under EN/IEC 60947-2.
What wire size does C40H45E400 accept?
The screw-type terminals accept up to 240 mm² aluminium or copper wire on all four poles.
Where can I buy C40H45E400 and what is the lead time?
We source the C40H45E400 through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time.
MPN
C40H45E400