What Are Power Relays and Their Uses

Relays are common components found in electrical applications, serving as a form of switch that is able to manage a circuit. Relays often come in varying forms, each featuring different components that allow for diverse capabilities. Power relays in particular are those that feature an electromagnet for their circuit control, and they regularly rely on a power source such as a battery for operation. While power relays excel in high voltage applications, they can still perform in low voltage conditions as well. This makes them versatile in their use, so such components find their way into multiple industries and settings. To help you better understand the benefit of power relays, we will discuss their design and functionality further.

 In general, the makeup of a typical power relay consists of an armature, electromagnet, contacts, and a spring. With power provided by the battery source, the electromagnet will generate a magnetic field powerful enough to adjust the positioning of an iron armature. As the armature shifts toward the coil, it will reach the contact and close the circuit. To open the circuit, the armature will be pulled away from the contact. With this basic set of operations, power relays find use in audio amplification systems, telephone infrastructure, automotive electronics, computers, and much more.

In most applications, the relay’s duty is simply to relay a signal from one circuit to another, and a single assembly may feature a dozen or more power relays for one simple task. In automobiles, for example, upwards of twenty or more power relays can be installed, allowing for the functionality of windshield wipers, the car horn, the power train system, and more. Modern cars are highly electrified, featuring computers and other components that manage the engine timing, emissions, ignition, and much more. All of this is managed with the Engine Control Module (ECM), that of which relies on a power distribution center for power. A PCM power relay is a common variation that is used for transferring power to the ECM, ensuring standard functionality.

 Reverse power relays are a specialized type, acting as a directional protective relay in their ability to deter power from flowing in the reverse direction in a circuit. When implemented within a circuit, the reverse power relay monitors power, disconnecting systems like a generator when its output falls below a present value to deter power from entering the stator coil. Reverse power relays are able to detect when flow reverses, and that is when they will carry out the disconnection to protect the circuit. Depending on the application, one may need a powerful reverse power relay to guarantee the wellbeing of circuit components.

With the use of power relays in vehicles, telephones, computers, and other common systems, one can see how they hold great importance. If you have a system or application where you need power relays or replacement components, it is important that you begin the sourcing process to ensure little downtime. Luckily for you, Industrial Gamut is a leading distributor that can fulfill all your operational needs with competitive pricing and rapid lead times.

Owned and operated by ASAP Semiconductor, we present customers access to an unrivaled inventory containing over 2 billion items that cater to a diverse set of industry verticals and applications. Whether you require items that are new, used, obsolete, or hard-to-find, we guarantee the quality of each and every one of our offerings through our quality assurance practices and strict sourcing policies. If you happen to be facing a time constraint and need parts quickly, rest easy as we can expedite the shipping process for countless items using our expansive supply chain network. Get started today and let Industrial Gamut serve as your strategic sourcing partner.


Recent Twitter Posts

Semiconductor's Certifications and Memberships

Thank You for Visiting.

We hope that you will visit us again the next time you need industrial parts and make us your strategic purchasing partner.

Request for Quote

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.