Schneider C40N32D400 ComPacT NSX400N Trip Unit 3P 400 A MicroLogic 2

The C40N32D400 is a Schneider Electric ComPacT NSX400N 3-pole fixed-mounted circuit breaker with an electronic MicroLogic 2.3 trip unit, rated 400 A at 40°C. It achieves an ultimate short-circuit breaking capacity of 50 kA at 380/415 V AC per IEC 60947-2 and delivers long-time, short-time, and instantaneous overcurrent protection (LSoI function).

Technical specifications:

• Commercial reference: C40N32D400
• Manufacturer: Schneider Electric
• EAN:
• Series / range: ComPacT NSX new generation
• Number of poles: 3P
• Rated current [In]: 400 A at 40°C
• Rated voltage [Ue]: 690 V AC 50/60 Hz
• Network type: AC, 50/60 Hz
• Ultimate breaking capacity [Icu]: 85 kA at 220/240 V AC; 50 kA at 380/415 V AC; 42 kA at 440 V AC; 10 kA at 660/690 V AC (IEC 60947-2)
• Rated insulation voltage [Ui]: 800 V AC
• Rated impulse withstand voltage [Uimp]: 8 kV
• Trip unit: MicroLogic 2.3, electronic, LSoI function
• Long-time protection [Ir]: 160-400 A, 9 adjustable settings
• Short-time protection [Isd]: 1.5-10 x Ir, 9 adjustable settings
• Instantaneous protection [Ii]: 4800 A, fixed
• Mounting: Fixed, back plate; handle position horizontal and vertical
• Connection: Front upper and lower terminals, 45 mm
• Electrical auxiliaries slots: 6
• IP rating: IP40 (IEC 60529)
• IK rating: IK07 (IEC 62262)
• Operating temperature: -25 to 70°C
• Dimensions (W x H x D): 140 x 255 x 110 mm
• Weight: 6.05 kg
• Standard: EN/IEC 60947-2

Features and benefits:

• Adjustable Ir (160-400 A, 9 steps) and Isd (1.5-10 x Ir, 9 steps) enable precise selective coordination in LV networks
• Thermal memory active for 20 minutes before and after tripping, preventing premature re-energisation of overloaded circuits
• LED local signalling indicates device ready (flashing green), 90% Ir prewarning (orange), and 105% Ir overload (red)
• Six slots for electrical auxiliaries allow flexible addition of signalling contacts and remote control accessories
• Wide operating range from -25 to 70°C supports demanding industrial environments

Applications:

• Main and sub-distribution boards in industrial and commercial LV electrical installations
• Protection of power distribution feeders and busbars in LV switchgear panels
• High fault-level sites where 50 kA breaking capacity at 415 V AC is required
• Selective coordination schemes requiring adjustable short-time delay overcurrent protection

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

Also known as: Schneider C40N32D400, Schneider Electric C40N32D400, NSX400N 3P 400A circuit breaker, ComPacT NSX400N MicroLogic 2.3.