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5V/12V Relay at 30A

Started by SteveAndrews, Aug 16 2013 09:38 AM
relay relays

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#1 SteveAndrews

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Posted 16 August 2013 - 09:38 AM

I have been looking for a 5V triggered relay - for a Netduino Pro 2 - that can (pass?) 12V DC at 30 amps. I saw the SainSmart boards, but they are only rated to 10 amps. Any thoughts on where I might find such a relay or relay board? Also, am I asking the right question? :-)

 

Thanks!


#2 NooM

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Posted 16 August 2013 - 11:03 AM

30 amps is a lot (of heat) - so i dont think relays can handle this well, the traces on the pcb may just melt.

 

maybe some solid state relay can handle that, look at mouser.com or shops like that wich have tons of parts.

 

 

may i ask what your planning todo?


My PlayGround and some Code

#3 Paul Newton

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Posted 17 August 2013 - 08:00 AM

HI Steve,

 

I just googled "30A 5V Relay", I found this module on Amazon (UK) for £11.29.

It has an opto-isolator built in so that it can be driven directly from a micro-controller like the Netduino.

The relay contacts are rated at 30Amps 30VDC.

I have not used this part myself, but it looks like it would to the job.

 

The module above has screw terminals, depending on your application, you might be better off with blade connectors. Many of the relays I saw in my search had these.

Automotive relays might also be a good choice for you since there are lots of high current loads in a vehicle, but you will almost certainly need 12V to drive the coil.

 

There are always lots of things to consider!

Hope this helps - Paul


#4 SteveAndrews

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Posted 17 August 2013 - 08:08 PM

I search as well, for quite awhile, but I'm new to this and I didn't want to make a mistake on something I haven't learned yet.

 

That relay looks promising, thanks!


#5 SteveAndrews

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Posted 27 September 2013 - 08:57 AM

Just a follow-up. I ended up using the Sainsmart 4 relay board to pass 12V to two additional relays that can handle the load. Thanks everyone!


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