C40F3TM400D | NSX400F 36kA DC 3P 400A TMD – Schneider Electric

Name: Schneider Electric NSX400F 36kA DC 3P 400A Circuit Breaker | C40F3TM400D
Brand: Schneider Electric
SKU: C40F3TM400D
Price: 55030.00 INR
Availability: InStock

SKU: C40F3TM400D

Original price was: ₹110,060.00.Current price is: ₹55,030.00. Excl. GST

In stock

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Looking for the C40F3TM400D | NSX400F 36kA DC 3P 400A TMD? This genuine Schneider Electric mccb is built for reliable circuit protection and isolation, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 400 A, 3 Poles. Order part number C40F3TM400D from myelectric.in — a trusted Schneider Electric supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	Schneider Electric
Part Number / SKU	C40F3TM400D
Category	MCCB
Current Rating	400 A
Frame Size	400 A
Poles	3 Poles
Breaking Capacity	36 kA
Rated Operational Voltage (Ue)	415V AC (50/60 Hz)
Rated Insulation Voltage (Ui)	800 V
Rated Impulse Withstand (Uimp)	8 kV
Service Breaking Capacity (Ics)	100% of Icu
Trip Unit Type	Thermal-magnetic (TMD)
Mounting	Fixed, front connected
Rated Frequency	50/60 Hz
Standard	IEC 60947-2 / IS 13947-2
Certifications	BIS certified, CE marked, RoHS compliant

⚡ 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.
Performance level F — breaking capacity 36 kA (standard breaking capacity, suitable for commercial and light industrial boards).
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.

❓ Frequently Asked Questions

Q: What load can the C40F3TM400D protect at its rated 400 A?

A: The C40F3TM400D 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 36 kA breaking capacity on the C40F3TM400D mean in practice?

A: Breaking capacity (36 kA) is the maximum prospective short-circuit current the C40F3TM400D can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 36 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 C40F3TM400D use — thermal-magnetic or electronic?

A: The C40F3TM400D 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 C40F3TM400D 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 C40F3TM400D 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.