C40S3TM400D | NSX400S 100kA DC 3P 400A TMD – Schneider Electric

Name: C40S3TM400D | NSX400S 100kA DC 3P 400A TMD - Schneider Electric - myelectric.in
Brand: Schneider Electric
SKU: C40S3TM400D
Price: 758.22 EUR
Availability: BackOrder

SKU: C40S3TM400D

Original price was: €1,579.63.Current price is: €758.22. Excl. GST

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Looking for the C40S3TM400D | NSX400S 100kA DC 3P 400A TMD? 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, 750 V DC, 3P. Order part number C40S3TM400D from myelectric.in — a trusted Schneider Electric supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Product
Brand	Schneider Electric
Part Number / SKU	C40S3TM400D
Category	MCCB
Main
Range	ComPacT
Product name	ComPacT NSX DC
Device short name	NSX400S DC
Product or component type	Circuit breaker
Device application	Distribution
Poles description	3P
Protected poles description	3D
[In] rated current	400 A at 40 °C
[Ue] rated operational voltage	750 V DC
Network type	DC
Suitability for isolation	Yes conforming to EN/IEC 60947-2
Utilisation category	Category A
Breaking capacity	100 kA Icu at 24…125 V DC 1 pole conforming to IEC 60947-2 100 kA Icu at 250 V DC 1 pole conforming to IEC 60947-2 100 kA Icu at 500 V DC 2 poles in series conforming to IEC 60947-2 100 kA Icu at 750 V DC 3 poles in series conforming to IEC 60947-2
Breaking capacity code	S 100 kA 500 V DC
Trip unit name	TM-DC
Trip unit technology	Thermal-magnetic
Trip unit protection functions	LI
Control type	Toggle
Circuit breaker mounting mode	Fixed
Complementary
[Ui] rated insulation voltage	750 V DC conforming to IEC 60947-2
[Uimp] rated impulse withstand voltage	8 kV conforming to IEC 60947-2
[Ics] rated service breaking capacity	100 kA at 24…125 V DC conforming to IEC 60947-2 100 kA at 250 V DC conforming to IEC 60947-2 100 kA at 500 V DC conforming to IEC 60947-2 100 kA at 750 V DC conforming to IEC 60947-2
Mechanical durability	5000 cycles
Electrical durability	2000 cycles at 750 V In/2 1000 cycles at 750 V In
Mounting support	Backplate
Mounting position	Horizontal and vertical Flat on the back
Upside connection	Front
Downside connection	Front
Connection pitch	45 mm
Protection type	L : for overload protection (thermal) I : for short-circuit protection (magnetic)
Trip unit rating	400 A at 40 °C
Long-time pick-up adjustment type Ir (thermal protection)	Adjustable
[Ir] long-time protection pick-up adjustment range	0.7…1 x In
Long-time protection delay adjustment type tr	Fixed
Instantaneous protection pick-up adjustment type Ii	Adjustable
[Ii] instantaneous protection pick-up adjustment range	2.5…5 x In
Earth-leakage protection	Without
Number of slots	6 slot(s)
Width (W)	140 mm
Height (H)	255 mm
Depth (D)	110 mm
Product weight	8.0 kg
Environment
Standards	EN/IEC 60947-2
Pollution degree	3 conforming to IEC 60664-1
IP degree of protection	IP40 conforming to IEC 60529
IK degree of protection	IK07 conforming to IEC 62262
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-50…85 °C
Relative humidity	0…95 %
Operating altitude	0…2000 m without derating 2000 m…5000 m with derating
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	29.200 cm
Package 1 Width	15.300 cm
Package 1 Length	15.000 cm
Package 1 Weight	5.474 kg
Unit Type of Package 2	S04
Number of Units in Package 2	3
Package 2 Height	30.000 cm
Package 2 Width	40.000 cm
Package 2 Length	60.000 cm
Package 2 Weight	17.072 kg
Unit Type of Package 3	P12
Number of Units in Package 3	12
Package 3 Height	45.000 cm
Package 3 Width	80.000 cm
Package 3 Length	120.000 cm
Package 3 Weight	80.288 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.
100 kA breaking capacity at 415V AC — safely clears bolted three-phase faults in high-power substations and MV/LV transformer secondaries.
TMD (Thermal-Magnetic) trip unit — adjustable overload setting (Ir) from 0.7–1× In with fixed instantaneous magnetic trip; simple and reliable for standard feeder applications.
3 Poles — three-phase feeder protection; neutral not switched (TN-C / IT systems).
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.

🔗 Compatible Products & Accessories

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

LV432598TLV432597TLV432641LV4293292937029450LV429387LV429407

❓ Frequently Asked Questions

Q: What load can the C40S3TM400D protect at its rated 400 A?

A: The C40S3TM400D 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 100 kA breaking capacity on the C40S3TM400D mean in practice?

A: Breaking capacity (100 kA) is the maximum prospective short-circuit current the C40S3TM400D can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 100 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 C40S3TM400D use — thermal-magnetic or electronic?

A: The C40S3TM400D uses a thermal-magnetic TMD trip unit — thermal bimetal for overload protection and electromagnetic mechanism for short-circuit. Compact, reliable, and maintenance-free for standard applications.

Q: Is the C40S3TM400D 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 C40S3TM400D 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.