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C40K42D400 NSX400K 10kA AC 4P4D 400A 2.3 Schneider Electric c40k42d400
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C40K42D400 | NSX400K 10kA AC 4P4D 400A 2.3 – Schneider Electric

SKU: C40K42D400

Original price was: ₹208,940.00.Current price is: ₹100,291.20. Excl. GST

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    Looking for the C40K42D400 | NSX400K 10kA AC 4P4D 400A 2.3? This genuine Schneider Electric mccb from the ComPacT range is built for reliable circuit protection and isolation, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 400 A at 40 °C, 800…1000 V AC 50/60 Hz, 4P. Order part number C40K42D400 from myelectric.in — a trusted Schneider Electric supplier offering competitive pricing, GST billing, and shipping across India and overseas.

    📋 Technical Specifications

    Product
    BrandSchneider Electric
    Part Number / SKUC40K42D400
    CategoryMCCB
    Main
    RangeComPacT
    Range of productComPact NSX400…630
    Device short nameComPacT NSX400K
    Product or component typeCircuit breaker
    Device applicationSpecial application
    Number of poles4P
    Protected poles description3t
    3t + N/2
    4t
    Neutral positionLeft
    [In] rated current400 A at 40 °C
    [Ue] rated operational voltage800…1000 V AC 50/60 Hz
    Network typeAC
    Network frequency50/60 Hz
    Suitability for isolationYes conforming to EN/IEC 60947-2
    Utilisation categoryCategory A
    [Icu] rated ultimate short-circuit breaking capacity36 kA Icu at 800 V AC 50/60 Hz conforming to IEC 60947-2
    10 kA Icu at 1000 V AC 50/60 Hz conforming to IEC 60947-2
    Performance levelK 10 kA 1000 V AC
    Trip unit nameMicroLogic 2.3
    Trip unit technologyElectronic
    Trip unit protection functionsLSoI
    Control typeToggle
    Circuit breaker mounting modeFixed
    Complementary
    [Ui] rated insulation voltage1000 V AC 50/60 Hz
    [Uimp] rated impulse withstand voltage8 kV
    [Ics] rated service short-circuit breaking capacity10 kA at 800 V AC 50/60 Hz conforming to IEC 60947-2
    10 kA at 1000 V AC 50/60 Hz conforming to IEC 60947-2
    Mechanical durability15000 cycles
    Electrical durability1000 cycles at 1000 V In
    Mounting supportBackplate
    Upside connectionFront
    Downside connectionFront
    Connection pitch45 mm
    Protection typeL : for overload protection (long time)
    So : for short time short-circuit protection with fixed delay
    I : for instantaneous short-circuit protection
    Trip unit rating400 A at 40 °C
    Long-time pick-up adjustment type Ir (thermal protection)Adjustable 9 settings
    [Ir] long-time protection pick-up adjustment range160…400 A
    Long-time protection delay adjustment type trFixed
    [tr] long-time protection delay adjustment range11 s at 7.2 x Ir
    16 s at 6 x Ir
    400 s at 1.5 x Ir
    Thermal memory20 minutes before and after tripping
    Short-time protection pick-up adjustment type IsdAdjustable 9 settings
    [Isd] Short-time protection pick-up adjustment range1.5…10 x Ir
    Short-time protection delay adjustment type tsdFixed
    Instantaneous protection pick-up adjustment type IiFixed
    [Ii] instantaneous protection pick-up adjustment range4800 A
    Earth-leakage protectionWithout
    Neutral protection settings0.5 x Ir (3t + N/2)
    1 x Ir (4t)
    No protection (3t)
    Zone selective interlocking ZSIWithout
    Number of slots for electrical auxiliaries6 slot(s)
    Local signallingFlashing LED (green) for ready to operate
    LED 105 % Ir (red) for overload
    LED 90 % Ir (orange) for overload
    Width (W)185 mm
    Height (H)255 mm
    Depth (D)110 mm
    Product weight7.9 kg
    Environment
    StandardsEN/IEC 60947
    Product certificationsCE
    CCC
    Electrical shock protection classClass II
    Pollution degree3 conforming to IEC 60664-1
    IP degree of protectionIP40 conforming to IEC 60529
    IK degree of protectionIK07 conforming to IEC 62262
    Ambient air temperature for operation-25…70 °C
    Ambient air temperature for storage-50…85 °C
    Relative humidity0…95 %
    Operating altitude0…2000 m without derating
    2000 m…5000 m with derating
    Packing Units
    Unit Type of Package 1PCE
    Number of Units in Package 11
    Package 1 Height19.4 cm
    Package 1 Width15.8 cm
    Package 1 Length33.0 cm
    Package 1 Weight6.5 kg
    Contractual warranty
    Warranty (in months)18

    ⚡ Key Features

    • 400 A frame rating — handles the full rated current continuously; designed for feeder and sub-distribution protection where fault levels exceed MCB capability.
    • 10 kA breaking capacity at 415V AC — safely clears bolted three-phase faults in commercial and light industrial switchboards.
    • Thermal-magnetic trip unit — factory-calibrated overload and short-circuit protection; suitable for standard feeder circuits without electronic adjustment.
    • CompacT NSX form factor — 70mm wide per pole; designed for high-density LV switchboards with up to 3 units per standard 250mm busbar bay.
    • Rotary handle with padlocking points — LOTO compliant; handle locks in OFF position with up to 3 padlocks, preventing accidental energisation during maintenance.
    • Manufactured to IEC 60947-2 / IS 13947-2 — complies with the applicable Indian BIS and IEC international standards for this product category.
    • BIS certified, CE marked, RoHS compliant — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
    • Genuine authorised Schneider Electric product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
    • GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
    • Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

    🔗 Compatible Products & Accessories

    The following genuine accessories and compatible devices are designed to work with this product. Contact myelectric.in for pricing and availability:

    LV432614TLV432621TLV432631LV432594LV432592LV432570LV4324652945029452LV429387LV429388LV429407LV429408LV432597TLV432598TLV432641LV432539LV429454LV432513

    ❓ Frequently Asked Questions

    Q: What load can the C40K42D400 protect at its rated 400 A?

    A: The C40K42D400 is rated to carry and protect circuits up to 400 A continuously. For motor loads, ensure the full-load current (FLC) of the motor does not exceed this rating. For resistive loads (heaters, lighting), the 400 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

    Q: What does the 10 kA breaking capacity on the C40K42D400 mean in practice?

    A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the C40K42D400 can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 10 kA — this is checked using a fault level calculation or from the upstream transformer impedance data. Installing a breaker with insufficient breaking capacity is a serious safety violation.

    Q: What trip unit type does the C40K42D400 use — thermal-magnetic or electronic?

    A: Refer to the product label or datasheet for the exact trip unit specification. The trip unit determines adjustability and protection accuracy.

    Q: Is the C40K42D400 suitable for use as a motor branch circuit protector (Type E coordination)?

    A: MCCBs used for motor branch circuit protection must be coordinated with the downstream overload relay for Type 2 coordination (no damage to contactor or relay on short-circuit). Verify the Schneider Electric coordination table for the specific contactor-overload-MCCB combination to confirm Type 1 or Type 2 coordination is achieved.

    Q: Can the C40K42D400 be motorised for remote switching and automation?

    A: Yes. Schneider Electric MCCBs in this series support rotary handle adaptation and motorised operating mechanisms as accessories, enabling remote ON/OFF switching via PLC, SCADA, or BMS. Motorised MCCBs are used for automatic load management and remote trip in automated distribution systems.

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