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Old 03-28-2010, 01:09 PM
Ben Solwitz Ben Solwitz is offline
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Solid State Relays are electronic switches, like a mercury relay, but all electronic. Silicon Controlled Rectifiers are solid state devices for controlling current, they limit the power going to resistive heating elements like those used in moly or kanthal a1 furnaces or annealers. Most people don't use them for a1 elements but you can get better element life because you can run the elements continuously at 50% or 60% or whatever instead of switching them between 0% and 100%.
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