A general relay is a common electrical control device that can receive a control signal and transfer electrical energy to another circuit by switching a mechanical circuit. Featuring simple structure, convenient use, and high reliability, general relays are widely applied in fields， such as machinery and automatic control, mainly for signal transmission and control in circuits.

We summarize the following roles of relays in control units:

1. Expanding the control range: When the control signal of a multi contact relay reaches a certain value, it can simultaneously switch,break or connect multiple circuits according to different forms of contact groups.

2. Amplification: Sensitive relays, intermediate relays, etc.Can control a high power circuit with a very small control quantity.

3.Integrating signals: When multiple control signals are input into a multi winding relay in a specified form, they are compared and integrated to achieve the predetermined control effect.

4. Automatic, remote control, and monitoring: Relays on automatic devices, together with other electrical appliances, can form a program control circuit to realize automated operation.

In summary, relays not only play a role as switches in control units, but also involve multiple aspects such as signal amplification, isolation, automatic control, and circuit protection. They are an indispensable component of modern electronic devices and control systems.

We manufacture various types of relays, such as 12V normally open 80A automotive relays, 40A automotive relays, Multi Contact Relay, sensitive relay, intermediate relay, Multi winding relay,A utomotive relay and other high current universal relays, which are widely used in remote control, telemetry, communication, automatic control, mechatronics, and power electronic equipment.