EXORA MCB 63A DP 240V AC 10kA D Curve | L&T – BB20630D

Name: L&T Exora 63A DP MCB, D Curve, 240V AC, 10kA | BB20630D
Brand: Lauritz Knudsen (L&T)
SKU: BB20630D
Price: 958.50 INR
Availability: InStock

SKU: BB20630D

Original price was: ₹2,130.00.Current price is: ₹958.50. Excl. GST

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📋 Technical Specifications

Parameter	Value
Brand	BB20630D
Part Number / SKU	BB20630D
Category	Miniature Circuit Breaker (MCB)
Current Rating	63 A
Voltage Rating	240V AC
Poles	2 Poles
Breaking Capacity	10 kA
Tripping Curve	Curve D
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified where applicable

⚡ Key Features

Protects circuits at 63 A with 10 kA short-circuit breaking capacity — rated for light industrial and commercial distribution boards.
Curve D tripping characteristic — optimised for high-inrush loads (transformers, solenoids, welding machines) — trips magnetically at 10–20× 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 BB20630D 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 BB20630D protect at its rated 63 A?

A: The BB20630D 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 10 kA breaking capacity on the BB20630D mean in practice?

A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the BB20630D can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 10 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 D specified for the BB20630D and what loads is it optimised for?

A: Curve D on the BB20630D trips magnetically at 10–20× rated current, making it ideal for highly inductive loads with large inrush — transformers, large motors, welding machines. 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 BB20630D suitable for both single-phase and three-phase systems?

A: The BB20630D 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 BB20630D be DIN rail mounted in any standard distribution board?

A: Yes. This BB20630D 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.