EXORA MCB 25A DP 240V AC 10kA D Curve | L&T – BB20250D

Name: L&T Exora 25A DP MCB, D Curve, 240V AC, 10kA - BB20250D
Brand: Lauritz Knudsen (L&T)
SKU: BB20250D
Price: 623.25 INR
Availability: InStock

SKU: BB20250D

Original price was: ₹1,385.00.Current price is: ₹623.25. Excl. GST

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Looking for the EXORA MCB 25A DP 240V AC 10kA D Curve | L&T? This genuine BB20250D miniature circuit breaker (mcb) is built for reliable circuit protection and isolation, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 25 A, 240V AC, 2 Poles. Order part number BB20250D from myelectric.in — a trusted BB20250D supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	BB20250D
Part Number / SKU	BB20250D
Category	Miniature Circuit Breaker (MCB)
Current Rating	25 A
Voltage Rating	240V AC
Poles	2 Poles
Breaking Capacity	10 kA
Tripping Curve	Curve D
Rated Voltage	230/400V AC
Rated Frequency	50/60 Hz
Magnetic Trip Range	10–20 × In (per IEC 60898-1)
Trip Mechanism	Thermal-magnetic (bimetal overload + electromagnetic short-circuit)
Mounting	35mm DIN rail (EN 60715)
Width	36 mm (2 × 18mm modules)
Electrical Endurance	≥ 20,000 operating cycles (per IEC 60898-1)
Pollution Degree	3 (per IEC 60664-1)
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified where applicable

⚡ Key Features

Protects circuits at 25 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 BB20250D 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 BB20250D protect at its rated 25 A?

A: The BB20250D is rated to carry and protect circuits up to 25 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 25 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 10 kA breaking capacity on the BB20250D mean in practice?

A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the BB20250D 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 BB20250D and what loads is it optimised for?

A: Curve D on the BB20250D 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: What happens when the BB20250D trips — how do I identify and reset it?

A: When the BB20250D trips on fault, the handle moves to a midway position (between ON and OFF), distinctly visible from a distance. To reset: (1) identify and rectify the fault, (2) push the handle fully to OFF, (3) then switch back to ON. Never force-reset without investigating the fault cause.

Q: Is the BB20250D suitable for both single-phase and three-phase systems?

A: The BB20250D 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.