Solid State Relays:

Hey nice name. Sounds VERY professional indeed.

(Note: Most people here will engage discussion using their real names. With a post like this it is pretty hard to take you seriously).

As far as the advantages and disadvantages of these components. That is almost impossible to discuss. The number of types of mechanical relays alone would require a complete book to contrast their differences and uses. Then when you throw in the solid state types it VERY quickly gets down to serious questions like -- "What application are you considering?" -- "What power levels are required for the output stage?" -- "What kind of switching configuration is needed?" -- "What type of drive circuit or device must activate the relay?" -- "How much isolation is needed?".

With answers to some of these questions it will be possible to narrow the field of alternatives down so that a realistic discussion can be had on the relative merits of the two types to the specific application.

You know....a general question like you asked really seems to show that you have not done any preliminary work on your own to familiarize yourself with the 1000's of styles of relays. If you do this it may become obvious to you what types of components would be suitable to your usage.

Michael Karas