What is a Solid State Relay Used For?

Solid state relays are widely used, but different types have different applications. Do you know the related applications of solid state relays? The infinite creativity of human beings has made the leap from the traditional electromagnetic relay to the solid-state relay, which is a relay without mechanical motion and without moving parts. Compared with the previous relays such as electromagnetic relay, it has many advantages, such as zero noise, long life, fast switching speed, anti-interference, corrosion resistance and so on, so it has been widely used.

Up to now, solid state relays have been classified into various categories, including AC to AC SSR relay, DC to AC SSR solid state relay, single phase solid state relay and 3 phase solid state relay. The device type can be divided into installation type, panel type and circuit board type, and the components can be divided into ordinary type and enhanced type. It is these different categories that make solid-state relays can be applied in many fields, and the application of solid-state relays is more convenient for our life. In the following, atorelays.com will introduce some application fields of SSR.



  1. Household appliances. The type of solid state relay SSR is suitable for general household appliances are DC input control, AC zero turn-on, zero turn-off output contactless relay and AC control, AC zero turn-on, zero turn-off output contactless relay, such as the daily incandescent lamp, heater, motor is produced by using this kind of solid state relay.
  2. Coal mining, petroleum and other industrial and mining industries. The industrial solid state relay of AC input control, AC zero turn-on, zero turn-off output contactless relay is widely used in coal mine, petroleum and other industrial and mining industries, its application greatly promotes the development of industrial and mining industries.
  3. Computer field. This area is beyond the reach of traditional electromagnetic relays. Its DC input control, AC zero turn-on, zero turn-off output contactless three-phase relay and AC control, three-phase AC zero turn-on, zero turn-off output contactless relay are widely used in computer peripheral interface equipment. Its application has greatly improved the level of computer development.
  4. Industrial automation field. Mainly for all kinds of DC power supply actuator control, such as lighting equipment, intelligent instrument and small DC motor.

Solid state relay can also be used in CNC machinery, remote control equipment, medical equipment and so on, and has become the ideal replacement of relay family products. Although solid state relay has many advantages and is widely used, it still has some shortcomings. Therefore, we should pay attention to its development pace, strive for its further optimization and enhance its practicability.