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L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole
The L&T Larsen & Toubro MNX 12 Power Contactor is a three-pole electromagnetic switching device designed for industrial motor control and power distribution applications operating at 220-240V AC supply. Professional electricians, automation engineers, and industrial maintenance technicians rely on this contactor for reliable on-off switching of three-phase motors and heavy electrical loads in manufacturing plants, HVAC systems, and industrial automation panels. This contactor solves critical switching challenges by providing safe, repeatable electrical isolation and load control while protecting circuits from overcurrent conditions and mechanical wear associated with manual switching.
Product Overview
The MNX 12 Power Contactor operates on the principle of electromagnetic attraction, where an AC coil energized at 220-240V creates a magnetic field that pulls the movable armature toward the fixed core, mechanically closing the main contacts. The three-pole configuration allows simultaneous switching of all three phases in a three-phase power system, ensuring balanced load distribution and synchronized motor control. The contactor features robust silver alloy contacts rated for continuous duty cycles, spring-loaded mechanical latching mechanisms for reliable contact pressure, and thermal overload protection integration capability through auxiliary contact blocks.
The MNX 12 series distinguishes itself through superior arc suppression design, enhanced contact life expectancy exceeding 500,000 mechanical operations, and compliance with international standards including IS 9979 and IEC 60947-4-1. The compact modular design facilitates easy DIN rail mounting in control panels, while the standardized terminal configuration ensures compatibility with existing industrial infrastructure. The contactor's low power consumption coil design reduces heat generation and extends operational life, making it ideal for continuous duty applications in demanding industrial environments where reliability and cost-efficiency are paramount.
Key Specifications
| Specification | Details |
| Product Type | 3-Pole Power Contactor |
| Brand | Larsen & Toubro (L&T) |
| Model | MNX 12 |
| Coil Voltage | 220-240V AC, 50Hz |
| Poles | 3 Poles |
| Rated Current | 12 Amperes at 220-240V AC |
| Contact Material | Silver Alloy with Arc Suppression |
| Mechanical Life | 500,000+ Operations |
| Electrical Life | 100,000+ Switching Cycles |
| Mounting | DIN Rail Compatible |
| Terminal Type | Screw Terminals |
| Standards Compliance | IS 9979, IEC 60947-4-1 |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- Three-Pole Electromagnetic Switching: Simultaneous control of all three phases in three-phase motor circuits with synchronized contact closure ensuring balanced load distribution and preventing phase imbalance conditions
- 220-240V AC Coil Operation: Direct compatibility with standard Indian industrial power supply eliminating need for voltage transformers or auxiliary power supplies in control panel installations
- Silver Alloy Contact Construction: Superior electrical conductivity and arc resistance providing extended contact life, reduced voltage drop across contacts, and minimal heat generation during switching operations
- Compact DIN Rail Design: Space-efficient modular mounting reduces control panel footprint by up to 40% compared to traditional contactors while maintaining full electrical rating and operational reliability
- 500,000+ Mechanical Operations: Extended mechanical life cycle reduces replacement frequency and maintenance costs in continuous duty industrial applications operating 24/7
- Integrated Auxiliary Contact Blocks: Compatibility with optional NO/NC auxiliary contacts enables integration with thermal overload relays, interlocking circuits, and pilot light control systems
Applications and Use Cases
- Three-Phase Motor Control in Manufacturing: Direct online starting and stopping of induction motors up to 12A rating in textile mills, food processing units, and metal fabrication workshops where reliable motor switching is critical for production continuity
- HVAC System Management: Automated switching of air conditioning compressor motors and ventilation fan units in commercial buildings and industrial facilities, enabling energy-efficient operation through timer-based or sensor-triggered control circuits
- Industrial Automation Panels: Integration into PLC-controlled automation systems for coordinated switching of multiple motor circuits, conveyor systems, and pump stations in material handling and process automation applications
- Power Distribution and Load Switching: Remote control of heavy electrical loads in substations, industrial switchboards, and distribution panels where manual switching poses safety risks and operational inefficiencies
- Compressor and Pump Motor Control: Reliable switching of reciprocating and centrifugal pump motors in water treatment plants, pneumatic systems, and hydraulic power units requiring frequent on-off cycling
How to Use
Installation of the MNX 12 Power Contactor requires proper DIN rail mounting in a control panel with adequate ventilation to prevent thermal buildup. Secure the contactor firmly to the DIN rail using the mounting bracket, ensuring the coil terminals face upward for easy wire connection. Connect the 220-240V AC supply to the coil terminals using appropriately rated copper wire, typically 1.5-2.5 square millimeter cross-section for standard panel wiring. The three main terminals on top receive incoming three-phase power, while the three bottom terminals deliver controlled power to the motor or load circuit. Always install the contactor downstream of a circuit breaker rated for 16-20A to provide overcurrent protection for the contactor itself.
For proper operation, connect the control signal from your PLC, timer, or manual push-button station to the coil terminals through a safety relay or contactor control circuit. When voltage is applied to the coil, the electromagnetic force pulls the movable armature, closing all three main contacts simultaneously and completing the circuit to the connected motor or load. Upon de-energization of the coil, internal springs push the armature back, opening all contacts and interrupting power supply. For maximum contactor life, avoid rapid on-off cycling exceeding 10 operations per minute, ensure proper thermal management with adequate panel ventilation, and perform periodic visual inspection of contacts for signs of pitting or erosion every 6-12 months depending on switching frequency.
Frequently Asked Questions
What is the maximum motor power rating for the MNX 12 contactor at 220-240V AC?
The MNX 12 contactor rated at 12 Amperes can safely control three-phase motors up to approximately 2.2-2.5 kW at 220-240V AC, assuming a power factor of 0.85 and standard motor efficiency. For precise motor selection, multiply the rated current (12A) by the supply voltage (240V) and the power factor (0.85), then divide by 1000 to get kilowatts. Always verify the motor nameplate current rating does not exceed 12A for safe contactor operation and extended contact life.
Can the MNX 12 contactor be used for single-phase motor control?
While the MNX 12 is designed as a three-pole contactor for three-phase applications, it can technically control single-phase motors by utilizing only one pole and leaving the other two poles unconnected. However, this approach is inefficient and not recommended as it wastes two-thirds of the contactor's capacity. For single-phase applications, use a single-pole contactor of appropriate rating to optimize cost and panel space utilization.
What is the coil power consumption of the MNX 12 contactor?
The MNX 12 coil at 220-240V AC typically consumes approximately 3-5 watts during continuous energization, making it suitable for extended duty applications without excessive heat generation. This low power consumption reduces heat buildup in control panels, extends coil insulation life, and minimizes operating costs. The actual consumption may vary slightly based on manufacturing tolerances and ambient temperature conditions.
How do I integrate the MNX 12 contactor with a thermal overload relay for motor protection?
Connect the auxiliary NO (normally open) contact from the thermal overload relay in series with the contactor coil circuit. When motor current exceeds the overload relay setpoint, the auxiliary contact opens, de-energizing the contactor coil and stopping the motor. This configuration provides both electrical isolation through the contactor and thermal protection through the overload relay, meeting industrial safety standards for motor circuit protection.
What maintenance is required for the MNX 12 contactor?
Routine maintenance includes visual inspection every 6 months for contact pitting, corrosion, or mechanical damage, cleaning the contactor with compressed air to remove dust and debris, and checking terminal tightness to ensure secure electrical connections. For contactors operating in harsh environments with high switching frequency, inspect contacts every 3 months. Replace the contactor if contact erosion exceeds 1mm depth or if mechanical operation becomes sluggish, indicating spring fatigue or armature binding.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC
Buy L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole Online in India
Purchase the L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole
The L&T Larsen & Toubro MNX 12 Power Contactor is a three-pole electromagnetic switching device designed for industrial motor control and power distribution applications operating at 220-240V AC supply. Professional electricians, automation engineers, and industrial maintenance technicians rely on this contactor for reliable on-off switching of three-phase motors and heavy electrical loads in manufacturing plants, HVAC systems, and industrial automation panels. This contactor solves critical switching challenges by providing safe, repeatable electrical isolation and load control while protecting circuits from overcurrent conditions and mechanical wear associated with manual switching.
Product Overview
The MNX 12 Power Contactor operates on the principle of electromagnetic attraction, where an AC coil energized at 220-240V creates a magnetic field that pulls the movable armature toward the fixed core, mechanically closing the main contacts. The three-pole configuration allows simultaneous switching of all three phases in a three-phase power system, ensuring balanced load distribution and synchronized motor control. The contactor features robust silver alloy contacts rated for continuous duty cycles, spring-loaded mechanical latching mechanisms for reliable contact pressure, and thermal overload protection integration capability through auxiliary contact blocks.
The MNX 12 series distinguishes itself through superior arc suppression design, enhanced contact life expectancy exceeding 500,000 mechanical operations, and compliance with international standards including IS 9979 and IEC 60947-4-1. The compact modular design facilitates easy DIN rail mounting in control panels, while the standardized terminal configuration ensures compatibility with existing industrial infrastructure. The contactor's low power consumption coil design reduces heat generation and extends operational life, making it ideal for continuous duty applications in demanding industrial environments where reliability and cost-efficiency are paramount.
Key Specifications
| Specification | Details |
| Product Type | 3-Pole Power Contactor |
| Brand | Larsen & Toubro (L&T) |
| Model | MNX 12 |
| Coil Voltage | 220-240V AC, 50Hz |
| Poles | 3 Poles |
| Rated Current | 12 Amperes at 220-240V AC |
| Contact Material | Silver Alloy with Arc Suppression |
| Mechanical Life | 500,000+ Operations |
| Electrical Life | 100,000+ Switching Cycles |
| Mounting | DIN Rail Compatible |
| Terminal Type | Screw Terminals |
| Standards Compliance | IS 9979, IEC 60947-4-1 |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- Three-Pole Electromagnetic Switching: Simultaneous control of all three phases in three-phase motor circuits with synchronized contact closure ensuring balanced load distribution and preventing phase imbalance conditions
- 220-240V AC Coil Operation: Direct compatibility with standard Indian industrial power supply eliminating need for voltage transformers or auxiliary power supplies in control panel installations
- Silver Alloy Contact Construction: Superior electrical conductivity and arc resistance providing extended contact life, reduced voltage drop across contacts, and minimal heat generation during switching operations
- Compact DIN Rail Design: Space-efficient modular mounting reduces control panel footprint by up to 40% compared to traditional contactors while maintaining full electrical rating and operational reliability
- 500,000+ Mechanical Operations: Extended mechanical life cycle reduces replacement frequency and maintenance costs in continuous duty industrial applications operating 24/7
- Integrated Auxiliary Contact Blocks: Compatibility with optional NO/NC auxiliary contacts enables integration with thermal overload relays, interlocking circuits, and pilot light control systems
Applications and Use Cases
- Three-Phase Motor Control in Manufacturing: Direct online starting and stopping of induction motors up to 12A rating in textile mills, food processing units, and metal fabrication workshops where reliable motor switching is critical for production continuity
- HVAC System Management: Automated switching of air conditioning compressor motors and ventilation fan units in commercial buildings and industrial facilities, enabling energy-efficient operation through timer-based or sensor-triggered control circuits
- Industrial Automation Panels: Integration into PLC-controlled automation systems for coordinated switching of multiple motor circuits, conveyor systems, and pump stations in material handling and process automation applications
- Power Distribution and Load Switching: Remote control of heavy electrical loads in substations, industrial switchboards, and distribution panels where manual switching poses safety risks and operational inefficiencies
- Compressor and Pump Motor Control: Reliable switching of reciprocating and centrifugal pump motors in water treatment plants, pneumatic systems, and hydraulic power units requiring frequent on-off cycling
How to Use
Installation of the MNX 12 Power Contactor requires proper DIN rail mounting in a control panel with adequate ventilation to prevent thermal buildup. Secure the contactor firmly to the DIN rail using the mounting bracket, ensuring the coil terminals face upward for easy wire connection. Connect the 220-240V AC supply to the coil terminals using appropriately rated copper wire, typically 1.5-2.5 square millimeter cross-section for standard panel wiring. The three main terminals on top receive incoming three-phase power, while the three bottom terminals deliver controlled power to the motor or load circuit. Always install the contactor downstream of a circuit breaker rated for 16-20A to provide overcurrent protection for the contactor itself.
For proper operation, connect the control signal from your PLC, timer, or manual push-button station to the coil terminals through a safety relay or contactor control circuit. When voltage is applied to the coil, the electromagnetic force pulls the movable armature, closing all three main contacts simultaneously and completing the circuit to the connected motor or load. Upon de-energization of the coil, internal springs push the armature back, opening all contacts and interrupting power supply. For maximum contactor life, avoid rapid on-off cycling exceeding 10 operations per minute, ensure proper thermal management with adequate panel ventilation, and perform periodic visual inspection of contacts for signs of pitting or erosion every 6-12 months depending on switching frequency.
Frequently Asked Questions
What is the maximum motor power rating for the MNX 12 contactor at 220-240V AC?
The MNX 12 contactor rated at 12 Amperes can safely control three-phase motors up to approximately 2.2-2.5 kW at 220-240V AC, assuming a power factor of 0.85 and standard motor efficiency. For precise motor selection, multiply the rated current (12A) by the supply voltage (240V) and the power factor (0.85), then divide by 1000 to get kilowatts. Always verify the motor nameplate current rating does not exceed 12A for safe contactor operation and extended contact life.
Can the MNX 12 contactor be used for single-phase motor control?
While the MNX 12 is designed as a three-pole contactor for three-phase applications, it can technically control single-phase motors by utilizing only one pole and leaving the other two poles unconnected. However, this approach is inefficient and not recommended as it wastes two-thirds of the contactor's capacity. For single-phase applications, use a single-pole contactor of appropriate rating to optimize cost and panel space utilization.
What is the coil power consumption of the MNX 12 contactor?
The MNX 12 coil at 220-240V AC typically consumes approximately 3-5 watts during continuous energization, making it suitable for extended duty applications without excessive heat generation. This low power consumption reduces heat buildup in control panels, extends coil insulation life, and minimizes operating costs. The actual consumption may vary slightly based on manufacturing tolerances and ambient temperature conditions.
How do I integrate the MNX 12 contactor with a thermal overload relay for motor protection?
Connect the auxiliary NO (normally open) contact from the thermal overload relay in series with the contactor coil circuit. When motor current exceeds the overload relay setpoint, the auxiliary contact opens, de-energizing the contactor coil and stopping the motor. This configuration provides both electrical isolation through the contactor and thermal protection through the overload relay, meeting industrial safety standards for motor circuit protection.
What maintenance is required for the MNX 12 contactor?
Routine maintenance includes visual inspection every 6 months for contact pitting, corrosion, or mechanical damage, cleaning the contactor with compressed air to remove dust and debris, and checking terminal tightness to ensure secure electrical connections. For contactors operating in harsh environments with high switching frequency, inspect contacts every 3 months. Replace the contactor if contact erosion exceeds 1mm depth or if mechanical operation becomes sluggish, indicating spring fatigue or armature binding.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC
Buy L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole Online in India
Purchase the L&T Larsen & Toubro MNX 12 Power Contactors 220-240V AC, 3 Pole online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.