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Main => Builders Discussions => Topic started by: navymustang on April 26, 2021, 05:43:34 PM

Title: Solid State Relays (SSR) and thier use
Post by: navymustang on April 26, 2021, 05:43:34 PM
I have recently purchased an 8-channel SSR to be controlled via an Arduino Mega 2560. I use mechanical relays all the time. I'm new to SSRs, so can someone tell me why you are only supposed to control A/C loads and not D/C loads with them?
Thanks
Title: Re: Solid State Relays (SSR) and thier use
Post by: mickc on April 26, 2021, 06:28:08 PM
You can control DC loads with them, if they are DC SSRs.

This explains it pretty well:
https://www.phidgets.com/docs/Solid_State_Relay_Primer#How_SSRs_Work (https://www.phidgets.com/docs/Solid_State_Relay_Primer#How_SSRs_Work)
Title: Re: Solid State Relays (SSR) and thier use
Post by: ame on April 26, 2021, 09:58:30 PM
Indeed. There are two types of SSR. The ones you have, and the ones you need.  ;D
Title: Re: Solid State Relays (SSR) and thier use
Post by: navymustang on April 27, 2021, 04:51:35 AM
MIc, thanks - great article.

And indeed, I have bought something I should not have. But being a good builder, I will find a use for it in the future.  :)