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Solid state relays

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Biggsy:
Assuming it's not cheaper, would the 10A version of the Fotek SSR DA have any advantage over the 25A version when used with low loads, such as 3A?  More efficient?

I have a one already (a 25A); I want to get another.  5A max in practice would be ok for one, 10 or 13A for the second.

For those who don't know: these devices are controlled via an internal LED (instead of the coil of a conventional relay).  The sensor nicks current from the load or "output".  I know that a heatsink is required for loads over 5A (or arguably 3A) from a practical experiment.

Diver300:
There is no advantage to a 10 A SSR over a 25 A one, apart from cost and size.

Just use the 25 A one that you have. It is certainly not worth getting a smaller one, unless you need to buy any more.

Biggsy:
Thanks Diver.  I'm getting another for another application.  The cheapest I can find (including postage) happens to be a 25A, so I'll go for that again.

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