The complete guide on the working mechanism of the solid-state relay

How does the solid-state relay or the SSR work?

The electrical relays are hype in the electronic market since its invention. Crydom invented the Solid-state relays or SSR in 1971, which is considered as one of the significant steps in the revolution of the electrical industry in the relay technology.

Electrical relays play an integral role in human life. Everyone uses the electrical relay when they switch OFF or ON something. The traffic light signals also use the Solid state relay to work. The solid-state relay is accessible for maintaining a sleek and straightforward design but can be used for a wide range of applications.

The ethics of the solid-state relay
Many people might be new to the field, and hence directly starting with the concept can mislead the readers, and therefore we can start with ethics about the solid-state relay. The main difference between the SSR and electromechanical relay is the solid-state relays do not use any moving parts in their mechanism. SSR also uses physical contacts to complete their circuits. The SSR also uses the infra-red light-emitting diodes and LED couplers for their operation.

The five major types of the solid-state relay are

  • Transforming SSR
  • Optically-isolate SSR
  • Capacitor SSR
  • Hall effect SSR
  • Magnetically resistant SSR

The relation of galvanic separation with the solid-state relay

The galvanic separation process is the one in which two different electrical components are separated. The SSR relay does not use any physical connection to operate, and hence the infra-red light-emitting diodes are used for activation of the relays. Galvanic separation can make sure that no fault arises in the whole process, and therefore the users can connect the relay with multiple devices and separate the power regulation.

What is an optocoupler or an optoisolator?

The optocouplers play a crucial role in the working method of the SSR as they are the component for the light source, which plays a significant role in switching to occur. The transistor and resistor are arranged in such a way that the signal regulation energizes them. Once the maximum animation is reached, the optocoupler switches on the circuit, which allows full voltage through the output of the solid-state relay. The optocoupler works on two main components, where one transmit the signals, and the other receives the signals simultaneously to form a complete circuit.

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