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Why are solid-state relays advantageous over electromechanical relays?

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in Microcontroller by (14.6k points)
Why are solid-state relays advantageous over electromechanical relays?

(a) they need zero voltage circuit

(b) they need less current to be energised

(c) they need less voltage to be energised

(d) none of the mentioned

The question was asked in an international level competition.

My question comes from Interfacing with Motors topic in portion 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Right choice is (b) they need less current to be energised

Explanation: Solid-state relays are advantageous over electromechanical relays because their switching response time is much faster than electromechanical relays as solid-state relays are made-up of semiconductor materials. Also, solid-state relays required low input current for operation and small packaging make them ideal for microcontrollers.

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