Solid State Relay Circuit Example

Solid state relay is a type of switch to activate load by using without any mechanical parts.

Solid state relay circuit example. The most common application of solid state relays is in the switching of an ac load whether that is to control the ac power for on off switching light dimming motor speed control or other such applications where power control is needed these ac loads can be easily controlled with a low current dc voltage using a solid state relay providing long life and high switching speeds. In this there is only semiconductor devices used no mechanical coil relay is used to switching the connected load. Mechanical relays general purpose relays example of an electromagnetic relay emr an emr generates electromagnetic force when the input voltage is applied to the coil. Solid state relays ssrs representative example of switching for ac loads.

In this article we will briefly discuss the ssr solid state relay its construction operation schematics different types of ssr relays based on its switching property and input output forms we will also discuss the advantages disadvantages of solid state relay ssr comparing to electromagnetic. This article provides an introduction to the basic operation of solid state relays with a focus on the output devices in today s ssrs. Triac is used at the place of coil relay to switch on and off. There are many circumstances in which we need to control a high current voltage load based on the operation of a low power circuit such as when using the 5v output of a microcontroller to turn on a 10a 240v load.

The electromagnetic force moves the armature. What is solid state relay. Solid state relay ssr circuit using mosfets last updated on june 21 2020 by swagatam 46 comments ssr or solid state relays are high power electrical switches that work without involving mechanical contacts instead they use solid state semiconductors like mosfets for switching an electrical load. Construction operation applications types of ssr relays.