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A power relay is a switch that uses an electromagnet to open or close a circuit. The basic design of a relay utilizes an electromagnet coil, an armature, a spring and one or more contacts. If the power relay is designed to normally be open, the circuit is not completed when in the off state.
Signal relays for low level current switching
A signal relay is composed of coil that is secondary molded, which provides high insulation performance between the coil and the contact. Signal relays mainly have c-contact structure due to their purpose to switch current. These are compatible with reflow mounting and surface mount devices. Our signal relays are used for load switching typically under 2A and offer contact reliability, even if for a small signal load, due to their gold-plated contacts and bifurcated crossbar structures. Signal relays are commonly used in industrial devices such as machine tools, molding machines, welding machines, mounters, security devices, gaming machines, and testing and measuring devices.
Why is a relay required?
Apart from switching a circuit with heavy load, on & off, automotive relay is required to
1. Conserve energy
2. Prolong the life of deviceA bad car AC relay remains a common problem for many years, make and model automobiles. We have a lot of car air conditioning articles posted on the site that aim at getting your mobile cooling unit working again.A quick and dirty way to test a car air-conditioning relay is to locate it and then swap it out with the same type of relay. Often car manufacturers use the same exact part number relay in many different locations. This applies to all the vehicles mentioned above.