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Old 07-03-2008, 11:46 AM
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theremart theremart is offline
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RE the difference

Quote:
Originally Posted by InTheField View Post
I also haven't seen the schematic, but would really like to...



A lot of folks use the terms interchangeably, but the term "thyristor" actually encompasses more than just SCRs. An SCR is a sub-type of thyristor... other sub-types include things like "diacs" and "triacs". (A "diac" is basically a diode for AC circuits. A "triac" is also bidirectional, but has an "on" gate.) An SCR is basically a PNP coupled with an NPN together in one setup. Once it's turned "on", it stays on until the current flow drops below a certain amount. So, when you go to the local electronics store be specific and ask for an SCR. If you ask for a "thyristor" and you get the wrong clerk, you may end up with a triac... which isn't what you want, but fits what you asked for!

take care...
Thank you for the info I have passed it on!
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