AU HR MCB 100A DP 240V AC 15kA C Curve | L&T – AU15S21003C

Name: L&T AU15S21003C 100A DP MCB, C Curve, 15kA, 240V AC
Brand: Lauritz Knudsen (L&T)
SKU: AU15S21003C
Price: 4004.30 INR
Availability: InStock

SKU: AU15S21003C

Original price was: ₹8,705.00.Current price is: ₹4,004.30. Excl. GST

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📋 Technical Specifications

Parameter	Value
Brand	AU15S21003C
Part Number / SKU	AU15S21003C
Category	Miniature Circuit Breaker (MCB)
Current Rating	100 A
Voltage Rating	240V AC
Poles	2 Poles
Breaking Capacity	15 kA
Tripping Curve	Curve C
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified where applicable

⚡ Key Features

Protects circuits at 100 A with 15 kA short-circuit breaking capacity — rated for industrial sub-distribution boards with high prospective fault currents.
Curve C tripping characteristic — optimised for general-purpose and inductive loads (motors, mixed circuits) — trips magnetically at 5–10× rated current.
2 Poles — protects a single-phase circuit, switching both live and neutral; fits standard 35mm DIN rail in distribution boards.
Thermal-magnetic trip mechanism — bimetal element trips on sustained overload, instantaneous magnetic trip on short-circuit; two independent protection functions in one compact module.
Manufactured to IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial) — 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 AU15S21003C 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 AU15S21003C protect at its rated 100 A?

A: The AU15S21003C is rated to carry and protect circuits up to 100 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 100 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 15 kA breaking capacity on the AU15S21003C mean in practice?

A: Breaking capacity (15 kA) is the maximum prospective short-circuit current the AU15S21003C can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 15 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: Why is Curve C specified for the AU15S21003C and what loads is it optimised for?

A: Curve C on the AU15S21003C trips magnetically at 5–10× rated current, making it ideal for general-purpose circuits including fluorescent lamps, small motors, and mixed loads. Using the wrong curve can cause nuisance tripping (too sensitive) or inadequate protection (not sensitive enough). Always match the curve to the load’s inrush characteristics.

Q: Is the AU15S21003C suitable for both single-phase and three-phase systems?

A: The AU15S21003C is a 2 poles device for single-phase circuits. For three-phase circuits, use a 3-pole or 4-pole MCB of the same series.

Q: Can the AU15S21003C be DIN rail mounted in any standard distribution board?

A: Yes. This AU15S21003C MCB uses the standard 35mm EN 60715 DIN rail and 17.5mm module width, making it compatible with all major brand distribution boards and enclosures. Terminal capacity accommodates both rigid and flexible conductors up to the rated cross-section.