DU100D MCCB 63A 3P 415V AC 18KA Thermal Magnetic 50/60 Hz | L&T – CM90517OOHO

Name: L&T DU100D MCCB 63A 3P 415V 18KA Circuit Breaker | CM90517OOHO
Brand: Lauritz Knudsen (L&T)
SKU: CM90517OOHO
Price: 3666.00 INR
Availability: InStock

SKU: CM90517OOHO

Original price was: ₹6,110.00.Current price is: ₹3,666.00. Excl. GST

In stock

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📋 Technical Specifications

Parameter	Value
Brand	CM90517OOHO
Part Number / SKU	CM90517OOHO
Category	MCCB
Current Rating	63 A
Voltage Rating	415V AC
Poles	3 Poles
Breaking Capacity	18 kA
Frequency	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.
3 Poles — three-phase feeder protection; neutral not switched (TN-C / IT systems).
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 CM90517OOHO 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 CM90517OOHO protect at its rated 63 A?

A: The CM90517OOHO is rated to carry and protect circuits up to 63 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 63 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 18 kA breaking capacity on the CM90517OOHO mean in practice?

A: Breaking capacity (18 kA) is the maximum prospective short-circuit current the CM90517OOHO 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 CM90517OOHO be motorised for remote switching and automation?

A: Yes. CM90517OOHO 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 CM90517OOHO use — thermal-magnetic or electronic?

A: The CM90517OOHO 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 CM90517OOHO 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 CM90517OOHO coordination table for the specific contactor-overload-MCCB combination to confirm Type 1 or Type 2 coordination is achieved.