Check out our improved category page
Refine search results with advanced filtering options, select how you want to view products, and more.
Relays are electromagnetic switches that operate by using a small control current to manage a larger electrical load. Originating in the 19th century, their use was pivotal in the development of the telecommunications industry. Today, relays continue to play a crucial role not only in the telecom industry but also across the industrial and automotive sectors.
Their versatility has expanded into computing and medical research, where precision and reliability are paramount. This makes relays indispensable in a variety of modern applications, from everyday devices to advanced medical equipment, underscoring their enduring relevance and utility.
Relays work based on electromagnetic force. The core of a relay is made of a coil of wire (commonly copper, which is low-resistance and facilitates power transmission), which becomes a magnet when it receives an electric current.
They work as a bridge between devices, receiving an input signal from the first one and transmitting an output to the second. The electromagnetic current generated by the electrical input from the first device on the relay causes the contacts to open or close, determining the transmission or the blockage of the electrical signal to the second device. For more information, check out our breakdown of relays and signal conditioning.
The primary function of a relay is to control a larger electrical load with a smaller initial input. This capability is crucial for safely activating high-power devices without exposing control mechanisms to high currents, which could lead to overheating, electrical faults, or even fires. Thus, relays are indispensable for ensuring operational safety and efficiency in various electrical systems and industrial applications.
There are different kinds of relays suited for different applications:
Whatever relays you are looking for, we offer a broad range from the most trusted manufacturers worldwide, such as Panasonic, Omron, TE Connectivity and our very own RS Pro.
When buying a relay, choosing the correct one is critical to ensure efficiency and reliability in your project. Begin by considering the load requirements, voltage, and current specifications to avoid underperformance or damage.
From there, you should understand the differences in relay types and their applications to match your needs accurately. This is because incorrect relay selection can lead to operational inefficiencies, safety risks, and increased costs due to premature failure.
Lastly, verify compatibility with your system’s voltage and current and consider environmental factors like temperature and humidity that may affect the relay’s performance. Additionally, it's important to know how to troubleshoot common problems with relays, as this knowledge can significantly reduce downtime and maintenance costs.
Relays are essential components in various industries, serving as critical interfaces that manage power, control operations, and enhance safety across numerous industries and applications, such as:
RS is a globally recognised and trusted supplier, distributor, and manufacturer of relays that are extensively used across Australia. With our vast range of relays, we provide bespoke solutions for a multitude of applications, ensuring you find the precise relay for your specific needs.
Whether you need to buy relays for industrial uses or innovative projects, RS delivers reliable, high-performance products consistently. For more details on delivery services and fees, please refer to our Delivery Page.
Refine search results with advanced filtering options, select how you want to view products, and more.