Relays, Contactors & Solenoids
The Preeminent Source for All Your Relay Needs
Enhance the power of your electrical systems with our premium selection of relays, contactors, and solenoids. We have a large variety of relays in stock including Automotive, General Purpose, High Frequency & RF, Industrial, Low Signal, Reed, Safety, Timing and Solid State Relays.
Electromechanical relays are versatile electrical switches that use an electromagnet coil to mechanically operate a set of contacts. When a current flows through the coil, it generates a magnetic field that causes the contacts to open or close, allowing or interrupting the flow of current in another part of the circuit. Relays are indispensable devices that perform various functions in electrical and electronic systems. Their ability to switch, amplify, isolate, delay, and latch signals makes them essential components across industries, from home appliances to complex industrial automation.
Risk Mitigation & Investment Awareness
In today’s era of electrification, risk mitigation is paramount in ensuring the safety and reliability of electrical systems. This is where relays play a crucial role. Relays act as control devices, effectively managing and isolating electrical circuits to prevent overloads, short circuits, and other potential hazards. By automatically opening or closing circuits based on predetermined conditions, relays help in mitigating risks associated with electrical faults and failures. Their ability to interrupt power quickly in case of abnormalities not only protects equipment but also safeguards personnel and property from potential damage or accidents. Relays serve as essential components in modern electrification strategies, providing a layer of safety and control that is vital for the smooth and secure operation of electrical systems across various industries.
Connecting Customers to Relay Solutions
At Heilind, we’re very aware of the importance of Relay Technology as the world moves toward the “Electrification of Everything”. With lead-times continuing to be long, mitigating risk is a key factor in our thinking to help you meet your mission critical objectives. We’re investing in industrial and high-performance relays to support customers that are faced with these challenges. Please contact your sales person to review your needs and reserve your future needs today.
Featured Products
TE’s high performance CII relays provide enhanced switching and electrical specifications for demanding environments. The high performance relays are engineered to perform reliably in commercial, nuclear, harsh aerospace and military applications. These are available in multiple pole contacts with ratings that range from 1 to 60A with MIL qualifications on many versions. The high performance relays are available in many mounting and terminal configurations to fit your specific application.
Omron G9KB high power PCB DC relays offer bidirectional high capacity switching in a compact package ideal for energy storage systems, power conditioning, and electric vehicle charging applications.
The G9KB is rated for 600 volts DC and 50 amps and can be used bidirectionally, alternating between forward and reverse currents as needed. This eliminates the need for separate unidirectional relays, simplifying the design and reducing PCB area.
Ultra-compact 
relay modules from the TERMSERIES-compact with soldered relays, a smart all-around choice with a particularly low profile and extensive accessories.
They are extremely compact with only 6.4 mm width and 63 mm depth, 100% vibration-proof, and UL61010 certified. The TERMSERIES-Compact have a multi-voltage input with 24-230 V UC and 12-60 V UC available for the first time in an extremely compact design.
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Upgrade your electrical systems today with the finest relays, contactors, and solenoids available. Explore our wide range of reliable, high-performance products for all your electrical component needs.
Electromechanical relays (EMRs) are devices that switch electrical circuits mechanically through the use of a coil and one or more contacts. When voltage is applied to the coil, it creates a magnetic field that moves the contacts, either opening or closing them to control the flow of current in a separate circuit. EMRs are typically used for switching applications, motor control, signal isolation, and power distribution across industries like industrial automation, automotive, and home appliances.
Heilind supplies a wide range of electromechanical relays from several leading manufacturers. The categories of Electromechanical Relays include:
- Industrial Automation: Relays are commonly used in industrial automation systems for controlling motors, solenoids, valves, and other electrical devices. They play a crucial role in processes such as conveyor systems, packaging machinery, and assembly lines.
- HVAC (Heating, Ventilation, and Air Conditioning): Relays are utilized in HVAC systems for controlling fans, compressors, and heating elements. They help regulate temperature, humidity, and airflow in commercial and residential buildings.
- Automotive/EV: Relays are essential components in automotive electrical systems. They are used for controlling headlights, windshield wipers, power windows, and other functions that require switching high currents.
- Telecommunications: Relays are employed in telecommunications equipment for signal switching, routing, and amplification. They help manage the flow of data and ensure proper connections in communication networks.
- Power Distribution and Protection: Relays are utilized in electrical power systems for distributing and protecting power. They can isolate faulty circuits, control the flow of electricity, and provide overload or short-circuit protection.
- Medical Equipment: Relays are found in various medical devices and equipment, such as patient monitoring systems, diagnostic machines, and surgical instruments. They help control the operation of motors, pumps, and sensors.
- Consumer Electronics: Relays are used in consumer electronics products for switching power sources, controlling audio/video signals, and managing battery charging circuits.
- Renewable Energy Systems: Relays are employed in renewable energy systems like solar photovoltaic and wind power installations. They assist in controlling inverters, switches, and battery charging circuits.
- Railway and Transportation: Relays are critical components in railway signaling systems, traction control systems, and vehicle control systems. They ensure safe and reliable operation of trains and other transportation vehicles.
Enhanced Electrical Control: Relays act as a gateway, enabling precise control of electrical circuits. They allow low-power control signals to switch high-power loads, ensuring safe and efficient operation.
Electrical Isolation: Relays provide galvanic isolation, which helps protect control circuits from potentially damaging voltage spikes or fluctuations in the load circuit. This feature enhances safety, minimizes interference, and prevents damage to sensitive electronic components.
Versatility and Compatibility: Relays offer versatile compatibility with different voltage levels, making them compatible with a wide range of electrical systems. They can be easily integrated into new or existing systems, providing flexibility and scalability.
Longevity and Reliability: Designed to handle high electrical loads, they are constructed with robust materials capable of withstanding demanding operating conditions. Relays have proven track records of reliable performance, ensuring uninterrupted operation and minimizing downtime.
Wide Range of Applications: Relays find applications in various industries and sectors. From industrial control systems and power distribution to automotive electronics and telecommunications, relays are indispensable for ensuring smooth and efficient electrical operations. Their versatility makes them suitable for both low-power and high-power applications.
Easy Integration and Maintenance: Relays are relatively easy to install and maintain. They come in standardized packages and pin configurations, simplifying their integration into electrical systems.
Cost-Effective Solution: Relays offer cost-effective solutions for electrical control compared to alternative methods such as solid-state devices. They are often more affordable, especially for high-power applications, while providing similar or superior performance.
Relays for HVAC
Relays used in HVAC (Heating, Ventilation, and Air Conditioning) applications are critical components for controlling various functions such as switching, protection, and system control. Here are the types of relays commonly used in HVAC systems: Electromechanical Relays, Solid-State Relays, Pilot Relays, Control Relays, Overload Relays, Thermostatic Relays, & Safety Relays. Each type of relay has specific applications and advantages depending on the requirements of the HVAC system, such as load capacity, switching frequency, and the need for noise reduction or rapid response. Proper selection and application of these relays ensure efficient and reliable operation of HVAC systems.
| American Zettler: | American Zettler offers a range of relays specifically designed for HVAC applications. These relays are commonly used in heating and air conditioning equipment to switch heavier loads while maintaining a compact size. |
| Crouzet : | Manufactures a variety of relays including time-delay relays, power relays, and control relays that are used in HVAC systems. |
| Crydom (Sensata) : | Specializes in solid-state relays (SSRs) that are widely used in HVAC systems due to their durability and ability to handle frequent switching without mechanical wear |
| Deltrol Controls : | Offers a range of relays and contactors specifically designed for HVAC applications, including defrost relays, fan relays, and compressor relays |
| Omron Electric & Omron Industrial : | Offers a wide range of relays including general-purpose relays, power relays, and solid-state relays suitable for HVAC applications. |
| TE Connectivity : | Provides a comprehensive range of relays, including electromechanical, solid-state, and time-delay relays. Their Potter & Brumfield series is particularly well-known for HVAC applications. |
| WAGO : | With a wide range of options, including electromechanical and solid-state relays, WAGO products meet diverse operational needs while maintaining high standards of quality and durability. Designed to provide optimal performance, these relays ensure efficient and secure switching for control systems. |
| Weidmuller : | Weidmüller is known for its wide range of industrial automation and connectivity solutions, including electromechanical and solid-state relays well-suited for HVAC applications |
Relay Manufacturers
