I am looking into a solid state relay to solve my problem here. I think I have found something that might work, but I am a little concerned as to weather it will work bidirectionally (I need DC current to flow in either direction).
The relay I am looking at is here. It has a maximum current of 9A (I need 6.5), and it also has a reasonable price tag.
Can someone please tell me if it could possibly be the solution that I am searching for, I have scoured the datasheet, but I cant find any mention of polarity on the switched side of things. If it isn't the right relay, can someone please point me in the right direction.
Best Answer
The Solid State Relay linked in the question will not work for loads which could operate in either direction. For such purposes, search for SSRs specified for bidirectional DC or AC/DC loads (as distinct from just DC, AC or AC/Zero-crossing types).
While narrowing down to a specific such part will involve price, availability, voltage, package, size and perhaps other considerations, here are a few examples to illustrate that such relays do exist. Note how they are specified, to help extend the search for the ideal part:
Unfortunately Digikey does not seem to carry any bidirectional load SSRs specified for greater than 6.5 Amperes, so the search needs to continue elsewhere.
Alternatively, consider limiting the current across each SSR to below the maximum load current rating of the part.