Schneider C4032D400 ComPacT NSX400 Trip Unit 3P MicroLogic 2

The Schneider Electric C4032D400 is a MicroLogic 2.3 electronic trip unit for ComPacT NSX400/630 circuit breakers, providing 3-pole basic electronic protection at 400 A. Designed for power distribution applications, it delivers long-time, short-time, and instantaneous overcurrent protection (LSoI) with adjustable pick-up settings.

Technical specifications:

• Commercial reference: C4032D400
• Manufacturer: Schneider Electric
• EAN:
• Series / range: ComPacT NSX400/630 new generation
• Trip unit name: MicroLogic 2.3
• Technology: Electronic
• Number of poles: 3P (3 protected poles)
• Trip unit rating: 400 A at 40°C
• Rated voltage [Ue]: 690 V AC 50/60 Hz
• Network type: AC
• Network frequency: 50/60 Hz
• Protection function: LSoI - Long-time overload, Short-time short-circuit with fixed delay, Instantaneous short-circuit
• Long-time pick-up [Ir] range: 160-400 A (9 adjustable settings)
• Long-time delay [tr]: Fixed - 11 s at 7.2 x Ir, 16 s at 6 x Ir, 400 s at 1.5 x Ir
• Thermal memory: 20 minutes before and after tripping
• Short-time pick-up [Isd] range: 1.5-10 x Ir (9 adjustable settings)
• Instantaneous pick-up [Ii]: Fixed at 4800 A
• Circuit breaker mounting: Fixed
• IP protection rating: IP40 per IEC 60529
• Operating temperature: -25 to 70°C
• Storage temperature: -50 to 85°C
• Pollution degree: 3 per IEC 60947-1
• Electric shock protection class: Class II
• Standard: EN/IEC 60947-2
• Weight: 1.4 kg

Features and benefits:

• Adjustable long-time pick-up with 9 settings across 160-400 A enables precise overload protection tailored to load requirements
• Adjustable short-time pick-up with 9 settings (1.5-10 x Ir) allows coordination with upstream and downstream devices
• Built-in thermal memory retains thermal state for 20 minutes, preventing immediate restart after overload tripping
• Local LED signalling indicates device ready status (green flashing), overload at 105% Ir (red), and pre-alarm at 90% Ir (orange)
• Wide operating temperature range of -25 to 70°C suits demanding industrial environments
• Compatible with both ComPacT NSX400 and NSX630 new generation circuit breaker frames

Applications:

• Main and sub-main distribution boards in commercial and industrial facilities
• Power distribution switchgear requiring selective protection coordination
• Industrial panel builds where adjustable overload and short-circuit protection thresholds are required
• Feeder protection in low-voltage power distribution networks up to 690 V AC
• Applications requiring thermal memory to prevent nuisance re-energisation after overload events

Compliant with EN/IEC 60947-2. Part of the Schneider Electric ComPacT NSX new generation range.

Also known as: Schneider C4032D400, Schneider Electric C4032D400, MicroLogic 2.3 trip unit, NSX400 electronic trip unit.