LTLK K-Curve MCB for submersible pumps- 125A, 3P | L&T – LK31250K

Name: L&T LK31250K K-Curve MCB for Submersible Pumps, 125A 3P
Brand: Lauritz Knudsen (L&T)
SKU: LK31250K
Price: 15000.00 INR
Availability: OutOfStock

SKU: LK31250K

₹15,000.00 Excl. GST

Out of stock

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Looking for the LTLK K-Curve MCB for submersible pumps- 125A, 3P | L&T? This genuine LK31250K 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 125 A, 3 Poles. Order part number LK31250K from myelectric.in — a trusted LK31250K supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	LK31250K
Part Number / SKU	LK31250K
Category	Miniature Circuit Breaker (MCB)
Current Rating	125 A
Poles	3 Poles
Rated Voltage	230/400V AC
Rated Frequency	50/60 Hz
Trip Mechanism	Thermal-magnetic (bimetal overload + electromagnetic short-circuit)
Mounting	35mm DIN rail (EN 60715)
Width	54 mm (3 × 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

125 A rated current — provides overload and short-circuit protection for the connected circuit.
3 Poles — protects a three-phase circuit without 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 LK31250K 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 LK31250K protect at its rated 125 A?

A: The LK31250K is rated to carry and protect circuits up to 125 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 125 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What happens when the LK31250K trips — how do I identify and reset it?

A: When the LK31250K 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 LK31250K suitable for both single-phase and three-phase systems?

A: The LK31250K with 3 Poles can protect three-phase circuits. Each pole simultaneously interrupts one phase — ensuring all phases are de-energised on a fault.

Q: Can the LK31250K be DIN rail mounted in any standard distribution board?

A: Yes. This LK31250K 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.