ATEX Relays & Contactors | Explosion Proof Contactors in UAE
Ex Proof Relays & Contactors for Safe Hazardous Area Electrical Switching
Ex Proof Relays & Contactors are certified electrical switching components used to control, switch, isolate, and protect circuits in Hazardous Area installations. They support Explosion Proof, Ex Proof, Flame Proof, and Intrinsically Safe electrical systems used in oil & gas, petrochemical, offshore, marine, chemical, mining, power, utilities, and industrial automation environments.
At Atex Hub, we supply ATEX Relays & Contactors as part of our Ex Power Distribution & Electrical Components and complete Explosion Proof Electricals range.
Atex Hub supplies ATEX Relays & Contactors across UAE, Dubai, Abu Dhabi, Sharjah, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Europe, Africa, and worldwide.
What are ATEX Relays & Contactors?
ATEX Relays & Contactors are hazardous area electrical switching devices used inside certified Ex panels, motor starters, control systems, distribution boards, power panels, and automation circuits. Relays control low-power switching, signal logic, interlocks, alarms, and protection circuits. Contactors switch higher electrical loads such as motors, pumps, fans, compressors, heaters, lighting banks, and industrial equipment.
These components help automate switching operations while keeping electrical circuits protected inside certified hazardous area assemblies. When selected correctly, they support ATEX, Explosion Proof, Ex Proof, Flame Proof, Hazardous Area, and Intrinsically Safe system requirements.
ATEX Relays & Contactors help to:
- Switch electrical circuits safely in Hazardous Area locations
- Control motors, pumps, compressors, fans, lighting, and equipment
- Support Explosion Proof and Flame Proof power systems
- Provide control logic, alarm switching, and interlock functions
- Improve automation and process control reliability
- Support safe motor starter and power panel operation
- Support Intrinsically Safe circuits when designed correctly
- Meet ATEX and IECEx hazardous area requirements
Key Benefits of Explosion Proof Relays & Contactors
Explosion Proof Relays & Contactors improve electrical safety by supporting controlled switching inside certified hazardous area systems. They help automate power control, reduce manual switching, and improve equipment reliability in harsh environments.
- Safe Electrical Switching – Controls circuits inside hazardous area electrical systems.
- Motor Control Support – Switches motors, pumps, compressors, fans, and conveyors.
- Hazardous Area Safety – Suitable for gas, vapor, and dust-risk locations when certified.
- Explosion Proof Compatibility – Supports certified Ex electrical installations.
- Flame Proof System Support – Suitable for Ex d assemblies when selected correctly.
- Automation Integration – Works with PLC, SCADA, sensors, alarms, and control circuits.
- Reliable Interlocking – Supports process safety and equipment sequencing.
- Industrial Durability – Performs well in offshore, chemical, mining, oil & gas, and power facilities.
Types of ATEX Relays & Contactors
Different hazardous area control systems require different relay and contactor designs. The correct type depends on load rating, control voltage, switching function, protection method, enclosure type, and application.
ATEX Control Relays
ATEX Control Relays are used for low-power control logic, signal switching, alarm output, interlock control, and automation circuits in hazardous area panels.
- Supports control logic circuits
- Suitable for PLC and SCADA interfaces
- Helps switch signals and alarms
- Useful for interlock systems
- Supports field control operations
- Used inside certified Ex panels
Explosion Proof Power Contactors
Explosion Proof Power Contactors switch higher-current loads such as motors, pumps, heaters, lighting circuits, and industrial machinery in hazardous area electrical systems.
- Supports high-load switching
- Suitable for motors and pumps
- Helps control industrial equipment
- Works with motor starters and power panels
- Supports frequent switching operations
- Useful for process and utility systems
Ex Proof Motor Contactors
Ex Proof Motor Contactors control motors used with pumps, compressors, fans, conveyors, mixers, and rotating equipment.
- Supports motor start and stop functions
- Suitable for motor starter assemblies
- Helps control pumps and compressors
- Supports overload relay integration
- Useful for hazardous area machinery
- Supports local and remote control
Flame Proof Relay Panels
Flame Proof Relay Panels house relays and switching components inside certified Ex enclosures for safe control in gas hazardous areas.
- Supports Ex d flameproof applications
- Suitable for Zone 1 and Zone 2 when certified
- Protects relay circuits and terminals
- Supports control and alarm logic
- Useful for process control systems
- Provides strong enclosure protection
Intrinsically Safe Relay Interfaces
Intrinsically Safe Relay Interfaces support low-energy control and signal circuits used with sensors, transmitters, alarms, barriers, and monitoring systems.
- Supports Intrinsically Safe circuits
- Suitable for low-energy signal switching
- Helps interface field devices with control systems
- Useful for sensors and transmitters
- Supports PLC and SCADA systems
- Helps maintain safe IS circuit design
Key Uses of ATEX Relays & Contactors
ATEX Relays & Contactors support safe switching and automation across hazardous industrial facilities. They help manage control circuits, motor loads, alarms, interlocks, and power switching inside certified Ex electrical systems.
- Motor Switching – Controls pumps, compressors, fans, conveyors, mixers, and machinery.
- Control Logic – Supports automatic switching, sequencing, and interlocking.
- Alarm Switching – Activates alarms, indicators, warning lights, and safety circuits.
- Power Load Control – Switches lighting banks, heaters, panels, and equipment loads.
- PLC / SCADA Interface – Links field signals with automation and control systems.
- Motor Starter Operation – Works inside ATEX motor starters and control panels.
- Safety Interlock Support – Helps prevent unsafe equipment operation.
- Instrumentation Switching – Supports low-energy signal circuits when approved.
Key Features of Hazardous Area Relays & Contactors
Hazardous Area Relays & Contactors are designed for reliable switching, automation support, and safe operation inside certified Ex systems. Their correct use helps improve plant control and electrical safety in explosive atmospheres.
- ATEX Certified Design – Suitable for hazardous area switching applications.
- Explosion Proof Compatibility – Works inside approved Ex electrical systems.
- Ex Proof Power System Support – Supports switching in classified industrial areas.
- Flame Proof Options – Available for approved Ex d control assemblies.
- Intrinsically Safe Interface Options – Suitable for IS signal and control circuits when approved.
- Multiple Coil Voltage Options – Supports different control voltage requirements.
- Auxiliary Contact Options – Supports feedback, alarms, and interlock functions.
- Overload Relay Compatibility – Supports motor protection systems.
- Panel Integration – Works with ATEX motor starters, power panels, distribution boards, and LCPs.
- Wide Industrial Use – Suitable for oil & gas, chemical, offshore, mining, power, and automation systems.
Technical Specifications of ATEX Relays & Contactors
Technical specifications vary depending on relay type, contactor rating, coil voltage, contact arrangement, enclosure design, protection method, and project requirement. Always select relays and contactors according to hazardous area classification, load type, and system design.
| Specification | Typical Details |
|---|---|
| Product Type | ATEX Relay / Ex Contactor / Hazardous Area Switching Component |
| Application | Motor control, power switching, alarm switching, control logic, automation, interlocking |
| Component Type | Control relay, power contactor, motor contactor, auxiliary relay, timer relay, interface relay |
| Protection Methods | Ex d, Ex e, Ex t, Ex ia / IS support depending on assembly design |
| Certifications | ATEX, IECEx, CE, and project-specific approvals |
| Hazardous Zones | Zone 1, Zone 2, Zone 21, Zone 22 depending on certified assembly |
| Gas Groups | IIA, IIB, IIC depending on enclosure and system design |
| Dust Groups | IIIA, IIIB, IIIC depending on enclosure and system design |
| Temperature Class | T1 to T6 depending on component and enclosure rating |
| Rated Operational Voltage | 24V, 110V, 230V, 400V, 415V, 690V, or project-specific ratings |
| Coil Voltage | 24V AC/DC, 110V AC, 230V AC, or project-specific control voltage |
| Rated Current | Selected according to load type and contactor rating |
| Contact Arrangement | NO, NC, changeover, auxiliary contacts, multi-pole contacts |
| Load Type | Motor load, resistive load, inductive load, lighting load, control signal |
| Mounting Type | DIN rail, panel mount, enclosure mount, motor starter assembly |
| Enclosure Materials | Stainless steel, aluminium, GRP, cast aluminium, coated steel when supplied in assemblies |
| Ingress Protection | IP65, IP66, IP67, or project-specific rating when enclosed |
| Cable Entry Options | Metric, NPT, BSP, PG, or project-specific thread types when enclosed |
| Accessories | Auxiliary contacts, overload relays, timers, terminals, surge suppressors, labels |
Materials Used for ATEX Relay & Contactor Assemblies
Material selection affects enclosure life, switching reliability, corrosion resistance, heat performance, and maintenance needs. The correct material should match the hazardous zone, environmental exposure, and project specification.
| Material | Main Benefit | Common Application |
|---|---|---|
| Silver Alloy Contacts | Reliable switching performance | Relay and contactor contact points |
| Copper / Brass Conductive Parts | Good electrical conductivity | Terminals, coils, and internal connections |
| Stainless Steel SS304 / SS316 | Excellent corrosion resistance | Offshore, marine, chemical, and washdown enclosures |
| Cast Aluminium | Strong flameproof protection with reduced weight | Ex d relay and contactor enclosures |
| GRP / Coated Steel | Corrosion resistance or cost-effective protection | Control panels, relay boxes, and assemblies |
Hazardous Area Zones and Relay / Contactor Suitability
Hazardous area classification helps define how relays and contactors should be installed. Always use ATEX Relays & Contactors inside certified enclosures or approved assemblies that match the zone, gas group, dust group, temperature class, and protection method.
| Hazardous Zone | Area Description | Suitable Relay & Contactor Use |
|---|---|---|
| Zone 0 | Explosive gas continuously present | Intrinsically Safe low-energy relay interfaces only |
| Zone 1 | Gas likely during operation | Relays and contactors inside certified Ex d or Ex e assemblies |
| Zone 2 | Gas occasionally present | Ex Proof relay and contactor assemblies when certified |
| Zone 20 | Combustible dust continuously present | Dust-certified electrical assemblies |
| Zone 21 | Dust likely during operation | Ex t dust-protected relay and contactor assemblies |
| Zone 22 | Dust occasionally present | Certified hazardous area relay and contactor assemblies |
Temperature Classes
Temperature classes confirm that relay, contactor, and enclosure surfaces remain below the ignition temperature of surrounding gases, vapors, or dust. Selecting the correct class supports safe ATEX, Explosion Proof, Ex Proof, Flame Proof, Hazardous Area, and Intrinsically Safe installations.
| Temperature Class | Maximum Surface Temperature |
|---|---|
| T1 | 450°C |
| T2 | 300°C |
| T3 | 200°C |
| T4 | 135°C |
| T5 | 100°C |
| T6 | 85°C |
ATEX Relays & Contactors vs Standard Relays & Contactors
Standard relays and contactors may work in normal industrial panels, but they cannot be used safely in explosive atmospheres unless certified or installed inside approved Ex assemblies. ATEX Relays & Contactors support safe switching and control in classified zones.
| Feature | ATEX Relays & Contactors | Standard Relays & Contactors |
|---|---|---|
| Hazardous Area Use | Yes, when certified or enclosed correctly | No |
| ATEX / IECEx Certification | Available | Usually no |
| Explosion Proof Assembly Use | Suitable when approved | Not recommended |
| Flame Proof Panel Support | Available | No |
| Intrinsically Safe Relay Interface | Available when approved | Not suitable |
| Gas and Dust Zone Suitability | Designed for certified Ex systems | Not certified |
| Motor Control Support | Available | Available |
| Oil & Gas Use | Suitable | Not advised in hazardous zones |
Applications of Explosion Proof Relays & Contactors Across Industries
Explosion Proof Relays & Contactors are used wherever electrical circuits must switch safely in hazardous locations. They support motor control, automation, alarms, interlocks, and power switching across demanding industries.
Oil & Gas Industry
Relays and contactors control motors, pumps, compressors, alarms, interlocks, lighting, and process systems in refineries, gas plants, pipelines, LNG facilities, drilling sites, and terminals.
Petrochemical Industry
Petrochemical plants use ATEX Relays & Contactors around reactors, pumps, mixers, tank farms, loading bays, analyzer shelters, control rooms, and hazardous vapor areas.
Chemical Processing Industry
Chemical facilities use Flame Proof Relays & Contactors for dosing systems, transfer pumps, ventilation units, storage areas, control systems, alarms, and process machinery.
Offshore & Marine Facilities
Offshore platforms, vessels, ports, jetties, and coastal sites use corrosion-resistant relay and contactor assemblies where salt air, humidity, rain, and vibration affect electrical systems.
Power Plants and Utilities
Power plants use Ex Proof Relays & Contactors in substations, battery rooms, fuel handling zones, turbine areas, lighting networks, control systems, and instrumentation panels.
Mining and Dust-Prone Areas
Mining sites, cement plants, grain handling units, and powder processing facilities use dust-certified relay and contactor assemblies for conveyors, crushers, feeders, motors, and process equipment.
Industrial Automation
Automation systems use ATEX relays and contactors for PLC panels, SCADA networks, remote I/O, sensors, transmitters, motor starters, alarms, and field devices.
How to Select the Right ATEX Relay or Contactor
Selecting the correct ATEX Relay or Contactor improves switching safety, control reliability, and system performance. The product should match the hazardous zone, load rating, coil voltage, contact arrangement, protection method, enclosure design, and site environment.
Before selecting, consider:
- Hazardous Zone Classification – Identify whether the site is Zone 0, Zone 1, Zone 2, Zone 20, Zone 21, or Zone 22.
- Gas Group or Dust Group – Match the assembly with the gas, vapor, or combustible dust risk.
- Protection Type – Select Ex d, Ex e, Ex t, Explosion Proof, or Intrinsically Safe support as required.
- Load Type – Confirm motor load, lighting load, resistive load, inductive load, or signal load.
- Rated Current and Voltage – Match the relay or contactor rating with the connected circuit.
- Coil Voltage – Choose 24V, 110V, 230V, or project-specific control voltage.
- Contact Arrangement – Select NO, NC, changeover, auxiliary contacts, or multi-pole options.
- Motor Control Requirement – Use suitable contactors with overload relays when controlling motors.
- Panel Compatibility – Confirm fitment inside Atex Power Panels or certified Ex control panels.
- Cable Entry Requirement – Confirm compatibility with ATEX Cable Glands and sealing accessories when enclosed.
- Temperature Class – Verify the required T-Class for the hazardous location.
- Maintenance Requirement – Choose layouts that support safe inspection, testing, labeling, and replacement.
Correct selection improves circuit reliability, supports safer switching, protects equipment, and helps meet ATEX, IECEx, and international Hazardous Area standards.
Why Choose Atex Hub for ATEX Relays & Contactors?
Atex Hub supplies certified hazardous area electrical products for global industrial projects. Our range supports safe switching, power distribution, circuit protection, isolation, grounding, cable management, control, and instrumentation in demanding environments.
We supply ATEX Relays & Contactors as part of our Ex Power Distribution & Electrical Components range. Customers can also explore Atex Power Panels, ATEX Motor Starters, and Explosion Proof Electricals for complete Ex power and control systems.
Reasons to choose Atex Hub:
- Certified ATEX Relays & Contactors for hazardous area projects
- Options for control relays, power contactors, motor contactors, relay panels, and IS interfaces
- Suitable for motor control, alarm switching, interlocks, automation, and power switching
- Stainless steel, cast aluminium, aluminium, GRP, and coated enclosure options when supplied as assemblies
- Global supply across UAE, GCC, Europe, Africa, and worldwide
- Support for project, maintenance, and shutdown requirements
- Complete range of power panels, motor starters, distribution boards, enclosures, switchgear, and cable accessories
Certifications, Standards & Compliance
ATEX Relays & Contactors should comply with recognized hazardous area standards and project specifications. Certification confirms that the relay, contactor, or certified assembly is suitable for classified industrial locations and supports safer electrical switching.
- ATEX Directive 2014/34/EU – Defines European safety requirements for equipment used in explosive atmospheres.
- IECEx Certification System – Provides internationally recognized certification for hazardous area electrical equipment.
- IEC 60079 Standards – Covers design, selection, installation, inspection, and maintenance of Ex electrical equipment.
- IEC 60947 Low-Voltage Switchgear – Covers requirements for low-voltage switching and controlgear devices.
- CE Marking – Shows compliance with applicable European safety, health, and environmental requirements.
- ISO 9001 Quality Management – Confirms controlled quality processes for consistent manufacturing and supply.
Frequently Asked Questions
Q1: What are ATEX Relays & Contactors?
ATEX Relays & Contactors are hazardous area switching components used for control logic, motor control, alarms, interlocks, and power switching.
Q2: Where are Explosion Proof Relays & Contactors used?
They are used in oil & gas, petrochemical, chemical, offshore, marine, mining, power, utilities, and automation facilities.
Q3: What is the difference between a relay and a contactor?
A relay switches low-power control circuits, while a contactor switches higher electrical loads such as motors and lighting circuits.
Q4: Are ATEX Relays & Contactors suitable for Zone 1?
Yes, certified models or approved assemblies can suit Zone 1 applications when selected according to project requirements.
Q5: Can they support Intrinsically Safe systems?
Yes, approved IS relay interfaces can support low-energy signal and control circuits.
Q6: What coil voltages are available?
Common coil voltages include 24V AC/DC, 110V AC, 230V AC, and project-specific options.
Q7: Can contactors control motors in hazardous areas?
Yes, contactors can control motors when used inside certified Ex motor starter or panel assemblies.
Q8: Do ATEX Relays & Contactors need certified enclosures?
Yes, many relays and contactors must be installed inside certified hazardous area enclosures or approved Ex panels.
Q9: Does Atex Hub supply related Ex control products?
Yes, Atex Hub supplies motor starters, power panels, isolators, distribution boards, circuit breakers, enclosures, and cable accessories.
Q10: Does Atex Hub supply globally?
Yes, Atex Hub supplies across UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Europe, Africa, and worldwide.
Conclusion
ATEX Relays & Contactors provide safe electrical switching for hazardous area control and power systems. They support Explosion Proof, Ex Proof, Flame Proof, Hazardous Area, and Intrinsically Safe applications where reliable motor control, automation, alarm switching, and interlocking are essential.
At Atex Hub, we supply ATEX Relays & Contactors across Dubai, Abu Dhabi, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Europe, Africa, and worldwide. Customers can also explore our Ex Power Distribution & Electrical Components, Atex Power Panels, and Explosion Proof Electricals categories to build complete hazardous area power and control systems.
