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ST41939OOOO
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ST41939OOOO
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L&T
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ST41939OOOO - 40A, MPCB, 50kA, TM Release ,with short ckt. protection,Type MOG-H2M, Frame 2 - L&T

Cat No. ST41939OOOO
Category MPCB
Stock Back Ordered
Condition Brand New, Sealed Packaging
Product Type MPCB
Please contact us for the exact delivery timeline

Back Ordered

$248.51

Lead Time: 25 Working Days.

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Technical Specification

L&T ST41939OOOO MPCB Technical Specification

MPCB
Actuator Type —
Application Motor
Breaking Cap 50kA
OL Setting -
Protection —
Range of Product —
Rating 40A
Release Short Circuit Release
SC Setting 40
Type MOG-H2M(Rotary Type)-Frame2

Product Details

Lauritz Knudsen ST41939OOOO - 40A, MPCB, 50kA, TM Release ,with short ckt. protection,Type MOG-H2M, Frame 2. Electrihub represents a commitment to excellence, delivering world-class electrical products with precision, quality, and trust across global markets.

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Product Overview

Lauritz Knudsen ST41939OOOO - 40A, MPCB, 50kA, TM Release ,with short ckt. protection,Type MOG-H2M, Frame 2. Electrihub represents a commitment to excellence, delivering world-class electrical products with precision, quality, and trust across global markets.

Frequently Asked Questions for ST41939OOOO

Yes. RAS Electrihub Private Limited operates as an ISO-certified organization, ensuring quality sourcing, authentic products, and standardized procurement and delivery processes.
The price of Lauritz Knudsen ST41939OOOO MPCB depends on specifications, availability, and market conditions. You can check the latest GST-inclusive price on Electrihub India, which provides
genuine products, transparent billing, and PAN India delivery.
Yes. RAS Electrihub Private Limited provides PAN India delivery with reliable logistics, safe packaging, and doorstep delivery across all states and union territories.
Yes. RAS Electrihub Private Limited issues GST-compliant invoices and also supports PO-based invoicing for businesses, contractors, and organizations across India.
The L&T ST41939OOOO is a specialized high-performance MPCB (Motor Protection Circuit Breaker) engineered to protect industrial electric motors against thermal overloads, heavy short-circuits, and phase imbalances. It integrates both a thermal relay mechanism for overload safety and an instantaneous magnetic trip unit into one compact module. Genuine L&T industrial switchgear can be ordered online across India with complete warranty support through RAS Electrihub.
To accurately calibrate the thermal trip parameters on your L&T ST41939OOOO, access the adjustable thermal overload adjustment knob situated on the front facade of the breaker. Rotate the scale using an insulated calibration tool until the marker aligns precisely with the motor's Full Load Current (FLC) stated on its nameplate. Proper calibration prevents operational nuisance tripping and protects downstream assets. View comprehensive setup charts on RAS Electrihub.
The L&T ST41939OOOO MPCB features a modular architecture designed for rapid field-fitting of accessories. It supports snap-on elements including add-on auxiliary blocks and shunt release modules. These expansion blocks facilitate remote trip signals, alarm flags, under-voltage dropouts, and seamless feedback integration into PLC automation panels. Purchase authentic accessories from RAS Electrihub.
The L&T ST41939OOOO MPCB is fully rated for standard 3-phase industrial power distribution networks in India, typically operating up to 415V/690V AC at 50Hz. Its short-circuit breaking capacity (Icu and Ics) is optimized to manage severe fault currents common in heavy-duty environments, in strict alignment with the L&T Exora / Switchgear Series architectural standards. Detailed tech datasheets are hosted online at RAS Electrihub.
Yes, the L&T ST41939OOOO features an integrated differential phase-failure trip mechanism compliant with IS/IEC 60947-4-1 standards. In the event of an unbalanced phase or a total single-phasing fault, the internal slider quickens the thermal trip linkage to instantly isolate the motor winding and prevent critical overheating damage. This essential protection feature is standard across all L&T models on RAS Electrihub.
The L&T ST41939OOOO is a high-performance MPCB (Motor Protection Circuit Breaker) designed to protect electric motors from thermal overloads, short-circuits, and phase failures. It combines the functionality of a thermal relay for overload protection and a magnetic circuit breaker for instantaneous short-circuit protection into a single compact device. You can source authentic L&T switchgear globally through Electrihub.
To calibrate the thermal trip setting on the L&T ST41939OOOO, locate the thermal overload adjustment knob on the front facade of the unit. Use a precise calibration screwdriver to turn the dial until the pointer aligns with the Full Load Current (FLC) rating specified on your motor's nameplate. Proper coordination ensures optimal protection without nuisance tripping. For detailed wiring diagrams, check the Electrihub catalog.
The L&T ST41939OOOO MPCB is fully modular and supports a wide range of clip-on accessories for automation. Compatible modules include add-on auxiliary blocks and shunt release modules. These allow for remote fault indication, shunt tripping, undervoltage safety interlocks, and seamless integration into PLC control panels. Explore the full accessory line on Electrihub.
The L&T ST41939OOOO MPCB is engineered for standard industrial networks, typically rated up to 690V AC. Its ultimate short-circuit breaking capacity (Icu) depends on the specific voltage level (e.g., 400V/415V AC) and ranges from standard to high-fault capacities typical of the L&T Exora / Switchgear Series. Complete engineering parameters and datasheets are hosted on Electrihub.
Yes, the L&T ST41939OOOO includes differential phase failure sensitivity in compliance with international standards like IEC/EN 60947-4-1. If a phase loss or severe unbalance occurs in the motor circuit, an internal slide mechanism accelerates the thermal trip response to prevent winding burnout. This critical safety feature is standard across all L&T MPCB models available at Electrihub.

Reviews & Ratings

3.8
5 reviews
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Alok Joshi Jun 17, 2026

Ordered this ST41939OOOO MPCB for our factory panel setup. RAS Electrihub delivered it safely within 3 days. Finding authentic L&T automation components online in India with transparent pricing used to be tough, but they have made it incredibly easy.

Vikram Nair Jun 17, 2026

Excellent service by RAS Electrihub. Generally, finding specific automation products like this ST41939OOOO MPCB online is tough, but their e-commerce platform made it seamless. Price was highly competitive compared to local dealers, and the product performance is top-notch. Highly recommended for industrial buyers.

Suresh Das Jun 17, 2026

Excellent pricing and seamless checkout on RAS Electrihub. We needed the ST41939OOOO urgently for an automation breakdown issue, and it arrived right on time. Authentic L&T product with solid performance. Highly recommended online vendor!

Karan Jha Jun 17, 2026

Superb experience purchasing ST41939OOOO from RAS Electrihub. The online ordering process is completely hassle-free. Got a 100% original L&T product with a proper GST invoice at a much better rate than the offline market. Perfect platform for electrical switchgear.

Rahul Verma Jun 17, 2026

Great deal on the L&T ST41939OOOO. RAS Electrihub is doing an amazing job providing industrial switchgear directly online. The product came with original factory sealing and works perfectly. Will definitely buy again for our next project.

Related Categories

Contactors and Contactor Relays Auxiliary Contactors Capacitor duty contactor Earth Leakage Relay Motor Management Accessories Motor Protection Relay Motor Starter MPCB MPCB Accessories Over Load Relay Overload Relays Accessories Power Contactor Power Contactor Accessories Protective Relays Protective Relays Accessories

Tags

# L&T # ST41939OOOO # MPCB # 40A # MPCB # 50kA # TM # Release # with # short # ckt. # protection # Type # MOG-H2M # Frame # 2 # electrihub # electrical-supplies # electrical-supply-store
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