DU400N/DN3B/DN3 MCCB Accessory – 4P Spreader Terminals upto 400A | L&T – ST98066OOOO

Name: L&T 4P Spreader Terminals for DU400N/DN3B MCCB, 400A | ST98066OOOO
Brand: Lauritz Knudsen (L&T)
SKU: ST98066OOOO
Price: 4302.80 INR
Availability: InStock

SKU: ST98066OOOO

Original price was: ₹6,940.00.Current price is: ₹4,302.80. Excl. GST

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The ST98066OOOO ST98066OOOO is a mccb, engineered for reliable circuit protection and isolation in demanding Indian and international installations. Key ratings include 400 A, 4 Poles. Buy the DU400N/DN3B/DN3 MCCB Accessory – 4P Spreader Terminals upto 400A | L&T online at myelectric.in with GST invoice, genuine-product assurance, and fast delivery across India — bulk and worldwide export enquiries welcome.

📋 Technical Specifications

Parameter	Value
Brand	ST98066OOOO
Part Number / SKU	ST98066OOOO
Category	MCCB
Current Rating	400 A
Poles	4 Poles
Rated Operational Voltage (Ue)	415V AC (50/60 Hz)
Mounting	Fixed, front connected
Rated Frequency	50/60 Hz
Standard	IEC 60947-2 / IS 13947-2
Certifications	BIS certified where applicable

⚡ Key Features

Thermal-magnetic trip unit — factory-calibrated overload and short-circuit protection; suitable for standard feeder circuits without electronic adjustment.
4 Poles — three-phase + switched neutral (TN-S system) for full four-pole isolation per IEC 60364.
Manufactured to IEC 60947-2 / IS 13947-2 — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified where applicable — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised ST98066OOOO 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.

❓ Frequently Asked Questions

Q: What load can the ST98066OOOO protect at its rated 400 A?

A: The ST98066OOOO 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: Can the ST98066OOOO be motorised for remote switching and automation?

A: Yes. ST98066OOOO 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.

Q: What trip unit type does the ST98066OOOO 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 ST98066OOOO 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 ST98066OOOO coordination table for the specific contactor-overload-MCCB combination to confirm Type 1 or Type 2 coordination is achieved.

Q: What is the difference between an MCCB and a standard MCB — and why use the ST98066OOOO?

A: A standard MCB protects against overload and short-circuit only. An MCCB handles much higher fault levels and larger current ratings — MCCBs are rated up to 1600A with 25–200kA breaking capacity, compared to MCBs which are capped at typically 125A and 10kA. Choose the ST98066OOOO when the application specifically requires mccb characteristics.