DU100D MCCB 20A 4P 415V AC 18KA Thermal Magnetic 50/60 Hz | L&T – CM90518OOCO

Name: L&T DU100D 20A 4P Thermal Magnetic MCCB | CM90518OOCO
Brand: Lauritz Knudsen (L&T)
SKU: CM90518OOCO
Price: 5088.00 INR
Availability: InStock

SKU: CM90518OOCO

Original price was: ₹8,480.00.Current price is: ₹5,088.00. Excl. GST

12 People watching this product now!

Order protection

Buy with complete confidence.

We back each order with genuine supply, on-time dispatch and GST or commercial invoicing as required.

Buyer protection on every order

Global DeliveryShipped pan-India and to export markets.

On-Time DeliveryPacked and dispatched on schedule.

100% OriginalFrom brand-authorised channels only.

GST InvoiceCompliant, ITC-ready tax invoice.

Secure PaymentEncrypted, trusted payment gateways.

Also included Dedicated account manager Technical support Bulk & business pricing 3-day replacement

Sourced through authorised channels, the CM90518OOCO CM90518OOCO mccb delivers dependable performance for reliable circuit protection and isolation. Key ratings include 20 A, 415V AC, 4 Poles. myelectric.in stocks the DU100D MCCB 20A 4P 415V AC 18KA Thermal Magnetic 50/60 Hz | L&T for contractors, panel builders, and project buyers — buy online with GST invoice, or request a bulk quote for domestic supply and export to UAE, Singapore, UK, USA, Sri Lanka and more.

📋 Technical Specifications

Parameter	Value
Brand	CM90518OOCO
Part Number / SKU	CM90518OOCO
Category	MCCB
Current Rating	20 A
Voltage Rating	415V AC
Poles	4 Poles
Breaking Capacity	18 kA
Frequency	60 Hz
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

18 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.
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 CM90518OOCO 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 CM90518OOCO protect at its rated 20 A?

A: The CM90518OOCO is rated to carry and protect circuits up to 20 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 20 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 18 kA breaking capacity on the CM90518OOCO mean in practice?

A: Breaking capacity (18 kA) is the maximum prospective short-circuit current the CM90518OOCO can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 18 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: Can the CM90518OOCO be motorised for remote switching and automation?

A: Yes. CM90518OOCO 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 CM90518OOCO use — thermal-magnetic or electronic?

A: The CM90518OOCO 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 CM90518OOCO 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 CM90518OOCO coordination table for the specific contactor-overload-MCCB combination to confirm Type 1 or Type 2 coordination is achieved.