If the SSR has an LED wouldn't you still need a few ohms to keep the pic =
from sourcing or sinking to much ma?

He is using this switch on a water based device....why not use a water =
block heat sink?  The water would cool the heat sink and be preheated for =
the distilling phase.  :)

Tim

>3-32vdc things are coming!  OK, so we need to limit the current
>for this thing as though it were an LED  20 mA
>(I understand this problem but just barely)

No you don't have to do that. Just hook it up and go.
>when required.  And then switch the entire thing off when to
>product tank is full.

Yes, it will burn up and fail "on" unless you put a good-sized heatsink
on it. The 40A is sort of a theoretical maximum, but it should be okay
at 10A with an adequate HS. You need to keep the metal base plate of
the unit as cool as practical, pick the number of degrees C/W from the
maximum temperature spec and the maximum ambient, and try to do better.


Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the =
reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m=20
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m=20

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