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Relays
SSR, Solid State Relay
RLRL31
What is a solid state relay?
A Solid State Relay (SSR) is an electronic switching device that switches the flow of electricity when a small current is applied to its control terminals. SSRs consist of a sensor that responds to an appropriate input (control signal), a solid-state electronic switch that switches the load circuit, and a coupling mechanism from the control signal that activates this switch without mechanical parts. . The relay can be designed to switch alternating or direct current. It does the same function as the electromechanical relay, but with no moving parts
Solid state relays use power semiconductors such as thyristors and transistors to switch currents up to more than 100 amps. SSR relays can switch at very high speeds (on the order of milliseconds) compared to electromechanical ones, and have no mechanical contacts to wear out. When using this type of relays, its low tolerance to withstand momentary overloads must be taken into account, compared to electromechanical relays, and its greater resistance to the passage of current in its active state, so they will have a resistance in conduction that will imply a loss of power that will be transformed into heat. It is for this reason that they generally have a metal part to be able to attach a heat sink that reduces the temperature in the semiconductor. when performing high current switching.
And they do not produce electromagnetic interference EMI that disturb other equipment or sparks that produce electric arcs so they can be used in explosive environments.
As they are not mechanical, there are no rebounds in the commutation. unlike mechanical relays, as the reverse is usually preferable
