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A solid
state relay (SSR) is a solid state electronic
component that provides a similar function to an
electromechanical relay but does not have any moving
components, increasing long-term reliability. With
early SSR's, the tradeoff came from the fact that
every transistor has a small voltage drop across it.
This collective voltage drop limited the amount of
current a given SSR could handle. As transistors
improved, higher current SSR's, able to handle 100
to 1,200 amps, have become commercially available.
Compared to electromagnetic relays, they may be
falsely triggered by transients. |
