> My experience with triacs (the power component in the SSR) is that they d=
rop
> a considerable amount of voltage, like 2 volts. Multiply that by 15 amps =
or
> so, and you're talking real wattage. You need a good heat sink.
> Steel isn't very good.

The rough guide for SCR/Triac devices is 1W dissipation per amp load curren=
t.

And as Bob says, steel is not a good heatsink (although it will often do fo=
r many things).



--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.