EXORA MCB 4A SP 240V AC 10kA C Curve | L&T – BB10040C

Name: L&T Exora 4A SP MCB, 240V AC, C Curve, 10kA - BB10040C
Brand: Lauritz Knudsen (L&T)
SKU: BB10040C
Price: 280.60 INR
Availability: InStock

SKU: BB10040C

Original price was: ₹610.00.Current price is: ₹280.60. Excl. GST

20 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

Looking for the EXORA MCB 4A SP 240V AC 10kA C Curve | L&T? This genuine BB10040C 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 4 A, 240V AC, 1 Pole. Order part number BB10040C from myelectric.in — a trusted BB10040C supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	BB10040C
Part Number / SKU	BB10040C
Category	Miniature Circuit Breaker (MCB)
Current Rating	4 A
Voltage Rating	240V AC
Poles	1 Pole
Breaking Capacity	10 kA
Tripping Curve	Curve C
Rated Voltage	230/400V AC
Rated Frequency	50/60 Hz
Magnetic Trip Range	5–10 × In (per IEC 60898-1)
Trip Mechanism	Thermal-magnetic (bimetal overload + electromagnetic short-circuit)
Mounting	35mm DIN rail (EN 60715)
Width	18 mm (1 × 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 4 A with 10 kA short-circuit breaking capacity — rated for light industrial and commercial distribution boards.
Curve C tripping characteristic — optimised for general-purpose and inductive loads (motors, mixed circuits) — trips magnetically at 5–10× rated current.
1 Pole — protects a single-phase final circuit; 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 BB10040C 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 BB10040C protect at its rated 4 A?

A: The BB10040C is rated to carry and protect circuits up to 4 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 4 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 10 kA breaking capacity on the BB10040C mean in practice?

A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the BB10040C 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 C specified for the BB10040C and what loads is it optimised for?

A: Curve C on the BB10040C 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: What happens when the BB10040C trips — how do I identify and reset it?

A: When the BB10040C 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 BB10040C suitable for both single-phase and three-phase systems?

A: The BB10040C is a 1 pole device for single-phase circuits. For three-phase circuits, use a 3-pole or 4-pole MCB of the same series.