ComPacT NSX400...630
Schneider Electric catalog image for this SKU; may represent the product family.
TRIP UNIT
Trip unit MicroLogic 2.3 for ComPacT NSX 400/630 circuit breakers, electronic, rating 400A, 4 poles 4d
SKU C4042D400Schneider Electric C4042D400 is a trip unit in the ComPacT NSX400...630 range. Key specifications include poles: 4P; trip unit: MicroLogic 2.3; operational voltage: 690 V AC 50/60 Hz.
4PPoles
MicroLogic 2.3Trip unit
690 V AC 50/60 HzOperational voltage
PRODUCT DATA
Technical specifications
Source: Schneider Electric product catalog.
Verified September 18, 2026.
| Product reference | C4042D400 |
|---|---|
| Range | ComPacT |
| Range of product | ComPacT NSX400...630 |
| Product or component type | Trip unit |
| Trip unit name | MicroLogic 2.3 |
| Trip unit technology | Electronic |
| Range compatibility | ComPacT NSX400 ComPacT NSX630 |
| Device application | Distribution |
| Poles description | 4P |
| Protected poles description | 3D + N/2 4D 3D |
| Neutral position | Left |
| Trip unit protection functions | LSoI |
| Protection type | L : for overload protection (long time) So : for short time short-circuit protection with fixed delay I : for instantaneous short-circuit protection |
| Trip unit rating | 400 A at 40 °C |
| [Ue] rated operational voltage | 690 V AC 50/60 Hz |
| Network type | AC |
| Network frequency | 50/60 Hz |
| Circuit breaker mounting mode | Fixed |
| Long-time pick-up adjustment type Ir (thermal protection) | Adjustable 9 settings |
| [Ir] long-time protection pick-up adjustment range | 160...400 A |
| Long-time protection delay adjustment type tr | Fixed |
| [tr] long-time protection delay adjustment range | 11 s at 7.2 x Ir 16 s at 6 x Ir 400 s at 1.5 x Ir |
| Neutral protection settings | 0.5 x Ir (3D + N/2) 1 x Ir (4D) No protection (3D) |
| Thermal memory | 20 minutes before and after tripping |
| Short-time protection pick-up adjustment type Isd | Adjustable 9 settings |
| [Isd] Short-time protection pick-up adjustment range | 1.5...10 x Ir |
| Short-time protection delay adjustment type tsd | Fixed |
| Instantaneous protection pick-up adjustment type Ii | Fixed |
| [Ii] instantaneous protection pick-up adjustment range | 4800 A |
| Earth-leakage protection | Without |
| Zone selective interlocking ZSI | Without |
| Local signalling | Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload |
| Standards | EN/IEC 60947-2 |
| Electrical shock protection class | Class II |
| Pollution degree | 3 conforming to IEC 60947-1 |
| IP degree of protection | IP40 conforming to IEC 60529 |
| Ambient air temperature for operation | -25…70 °C |
| Ambient air temperature for storage | -50…85 °C |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official Schneider Electric reference ↗.