Schneider C40H42D400 Circuit Breaker, ComPacT NSX400H, 70kA/415VAC, 4P, MicroLog

The Schneider Electric C40H42D400 is a 4-pole ComPacT NSX400H circuit breaker rated at 400 A at 40°C, designed for electrical power distribution up to 690 V AC. With an ultimate breaking capacity of 70 kA at 415 V AC and the Micrologic 2.3 electronic protection unit, it delivers precise LSoI protection - long-time, short-time, and instantaneous - for demanding industrial distribution applications.

Technical specifications:

• Commercial reference: C40H42D400
• Manufacturer: Schneider Electric
• EAN:
• Series / range: ComPacT NSX new generation
• Product type: Circuit breaker
• Number of poles: 4P
• 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]: 100 kA at 220/240 V AC; 70 kA at 380/415 V AC; 65 kA at 440 V AC; 50 kA at 500 V AC; 20 kA at 660/690 V AC (IEC 60947-2)
• Service breaking capacity [Ics]: 70 kA at 380/415 V AC (IEC 60947-2)
• Performance level: H (70 kA at 415 V AC)
• Protection unit: Micrologic 2.3, electronic, LSoI function
• Long-time pick-up [Ir]: 160...400 A, 9 adjustable settings
• Short-time pick-up [Isd]: 1.5...10 x Ir, 9 adjustable settings
• Instantaneous pick-up [Ii]: 4800 A, fixed
• Rated insulation voltage [Ui]: 800 V AC
• Rated impulse withstand voltage [Uimp]: 8 kV
• Mounting: Fixed, back plate; handle position horizontal and vertical
• Connection: Front upper and lower, 45 mm
• Auxiliary slots: 6
• Dimensions (W x H x D): 185 x 255 x 110 mm
• Weight: 7.9 kg
• IP rating: IP40 (IEC 60529)
• IK rating: IK07 (IEC 62262)
• Operating temperature: -25...70°C
• Storage temperature: -50...85°C
• Relative humidity: 0...95%
• Operating altitude: up to 2000 m without derating, up to 5000 m with derating
• Standard: EN/IEC 60947-2
• Pollution degree: 3 (IEC 60664-1)

Features and benefits:

• Micrologic 2.3 electronic protection unit provides adjustable long-time and short-time overcurrent protection with 9 settings each
• Thermal memory active for 20 minutes before and after tripping, preventing premature restart under thermal stress
• Suitable for use as an isolator per EN/IEC 60947-2, allowing service disconnection
• 6 slots for electrical auxiliaries enabling flexible signalling, control, and communication add-ons
• Mechanical endurance of 15,000 cycles; electrical endurance of 12,000 cycles at 440 V In/2

Applications:

• Main circuit breaker in industrial and commercial low-voltage distribution boards
• Incoming and outgoing feeder protection in switchgear assemblies up to 690 V AC
• Power distribution in manufacturing plants, process industries, and building infrastructure
• Protection of busbars and main feeders in medium to large distribution panels
• Machine building and panel assembly requiring high breaking capacity and adjustable electronic protection

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

Also known as: Schneider C40H42D400, Schneider Electric C40H42D400, NSX400H 4-pole circuit breaker, ComPacT NSX400H Micrologic 2.3 400A.