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SS94139OOQO - MN 12 Thermal Overload Relay 180-300A 415V AC Class 10A | Lauritz Knudsen | L&T
| Cat No. | SS94139OOQO |
| Category | Over Load Relay |
| Stock | In Stock |
| Condition | Brand New, Sealed Packaging |
| Product Type | Over Load Relay |
In Stock — 4 Qty
| Quantity | Expected Delivery |
|---|---|
| 4 Units | 25 Business Days |
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Technical Specification
L&T SS94139OOQO Over Load Relay Technical Specification
| Over Load Relay | |
|---|---|
| Bimetal relay Type | TA25, TA42 and TA220 |
| Contactor Type | MNX Contactor |
| Current Range | 180-300A |
| Range of Product | — |
| Secondary Volt Ac | - |
| Sub Family | MN |
| Type | Thermal Overload Relay |
Product Details
Lauritz Knudsen SS94139OOQO - MN 12 Thermal Overload Relay 180-300A 415V AC Class 10A - MN Thermal Overload Relays, available from 0.2A to 570A complement the MNX range of power contactors. The relays are ambient temperature compensated, and the unique double slide mechanism provides reliable protection against single phasing. We are dedicatedly involved in providing an excellent quality products at Electrihub.
Product Dimensions
L&T SS94139OOQO dimensions and weight
Dimensions (L × W × H)
Length
10.3 cm
Width
4.9 cm
Height
9.9 cm
Weight
Net Weight
0.285 kg
Dimensions are approximate. For precise dimensional drawings, contact us.
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Product Overview
Lauritz Knudsen SS94139OOQO - MN 12 Thermal Overload Relay 180-300A 415V AC Class 10A - MN Thermal Overload Relays, available from 0.2A to 570A complement the MNX range of power contactors. The relays are ambient temperature compensated, and the unique double slide mechanism provides reliable protection against single phasing. We are dedicatedly involved in providing an excellent quality products at Electrihub.
Frequently Asked Questions for SS94139OOQO
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 SS94139OOQO Over Load Relay 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.
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 SS94139OOQO is a commercial-grade Over Load Relay designed to protect three-phase AC electric motors from continuous overcurrent conditions, thermal degradation, and mechanical stalling. It operates as a L&T MN/M-Power series heavy-duty bimetallic thermal overload relay, extensively utilized in industrial and commercial starter panels to deliver stable performance across varying thermal and load conditions. The device is engineered to comply with strict international benchmarks such as IEC/EN 60947-4-1, UL, and CSA standards, making it fully ready for integration into global power grids operating at both 50Hz and 60Hz. Procurement managers can find this authorized switchgear with global shipment support on Electrihub.com.
The L&T SS94139OOQO Over Load Relay continuously monitors phase currents via precisely calibrated internal elements (bimetallic strips or advanced electronic current transformers). In the event of a phase failure or single-phasing condition, the relay triggers an accelerated differential trip response to prevent rapid motor winding insulation breakdown. This action mechanically shifts the auxiliary contact block, opening the contact to break the control circuit coil and closing the contact to signal a system fault, ensuring complete protection across complex global automation networks.
The L&T SS94139OOQO is physically and electrically engineered for direct plug-in mounting to matching L&T power contactor frameworks, optimizing panel space and eliminating unnecessary control wiring. It is certified for both Type 1 and Type 2 coordination schemas under short-circuit conditions when combined with appropriate molded case circuit breakers (MCCBs) or high-capacity fuses. For independent installation profiles, standalone DIN rail or panel baseplates are supported, providing global panel builders on Electrihub with maximum engineering flexibility.
The L&T SS94139OOQO features a front-mounted current adjustment dial that allows commissioning engineers to set the precise trip threshold matching the motor's nameplate Full Load Current (FLC). The device features a user-configurable selection switch for Manual or Automatic reset modes; Manual mode requires an intentional field reset after diagnosing the overload fault, while Automatic mode allows the bimetallic components to self-cool and automatically restore the control path. Additionally, an integrated mechanical trip indicator enables swift diagnostic troubleshooting to minimize operational downtime.
Sourcing the L&T SS94139OOQO Over Load Relay via Electrihub.com provides international industrial buyers with guaranteed product authenticity, manufacturer warranty support, and full technical datasheet compliance. Electrihub.com is optimized for global enterprise supply chains, providing competitive wholesale commercial pricing, transparent export-ready compliance documentation, bulk order capability for major infrastructure projects, and specialized engineering support to ensure seamless component coordination across all international projects.
The L&T SS94139OOQO is a high-grade Over Load Relay engineered primarily to protect three-phase AC electric motors from damaging thermal overloads, prolonged stalled rotors, and phase imbalances. As detailed in its technical specifications, this relay operates as a L&T MN/M-Power series bimetallic thermal overload relay (extensively used across agricultural and industrial motor control centers in India, featuring adjustable current settings and ambient temperature compensation). It is an essential component for motor control centers (MCCs) and automation panels across India, and can be procured directly with full manufacturer warranty on Electrihub.
The L&T SS94139OOQO Over Load Relay utilizes internal bimetallic strips calibrated to bend under continuous overcurrent, heating up until they mechanically actuate the auxiliary trip contacts (95-96 NC and 97-98 NO). Additionally, it features differential tripping/travel mechanisms that provide accelerated tripping in the event of a single-phasing or phase failure condition. This prevents severe motor winding burnouts, making the SS94139OOQO exceptionally reliable for unpredictable power grids in Indian industrial zones.
The L&T SS94139OOQO is structurally and electrically optimized for direct plug-in mounting to matching L&T power contactors (such as the standard industrial starter ranges), creating a compact and rigid direct-on-line (DOL) or Star-Delta starter assembly. For standalone applications or independent panel mounting, it can be attached to an independent DIN rail or base plate adapter using standard screw terminals, ensuring flexible integration inside electrical panels sourced via Electrihub.in.
The L&T SS94139OOQO features a front-accessible, adjustable dial that allows panel engineers to precisely set the current trip threshold matching the motor's full load current (FLC). It also includes a versatile user-selectable reset button supporting both 'Manual' reset (requiring field maintenance intervention after a fault verification) and 'Automatic' reset modes. A mechanical trip indication indicator is integrated to speed up diagnostics during maintenance cycles.
Electrihub is India’s leading B2B e-commerce platform for authorized industrial switchgear and automation components. When purchasing the L&T SS94139OOQO Over Load Relay through Electrihub.in, buyers receive 100% genuine products, full compliance with GST tax invoicing, access to bulk commercial discount schemes, rapid logistics to major industrial hubs, and dedicated technical customer support for complex switchgear coordination challenges.
Reviews & Ratings
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We needed a genuine L&T SS94139OOQO for an emergency replacement. Electrihub had it in stock at a very reasonable price. Great purchasing experience on their site.
Installed this SS94139OOQO overload relay last week. High-quality switchgear from L&T. Thank you Electrihub for the seamless transaction and fast dispatch.
Electrihub customer service was very helpful in verifying the technical specs for this Over Load Relay. The SS94139OOQO functions exactly as it should. Shipping took a day longer than anticipated, but otherwise perfect.
Top-tier Over Load Relay. Electrihub is our primary supplier for industrial automation parts because they always deliver authentic products with full documentation.
Bought this L&T Over Load Relay (SS94139OOQO) from Electrihub. The item arrived quickly and was well-packaged. Fits perfectly into our control cabinet and works as expected.
We routinely source our panel components from RAS Electrihub. This L&T Over Load Relay (SS94139OOQO) is highly reliable and authentic. Highly recommend their .in site.
Good technical guidance from RAS Electrihub regarding this SS94139OOQO. The Over Load Relay operates perfectly. Box had minor dust but inside item was mint.
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