AC relay - run on DC?

Thread Starter

Man_in_UK

Joined May 13, 2008
180
I have an Omron MKS3PI-5 relay with an AC24V coil.

Will there be any bad effects on running it on 24VDC?

I realise I could just purchase a DC version but there is a valid reason to use the AC type.


Any help will be great
 

gerty

Joined Aug 30, 2007
1,305
I have an Omron MKS3PI-5 relay with an AC24V coil.

Will there be any bad effects on running it on 24VDC?

I realise I could just purchase a DC version but there is a valid reason to use the AC type.


Any help will be great
I have used ac 24volt coil relays on 12volt dc before. I used them for intermittant use and had no problem.
The major difference, that I'm aware of, is ac relays usually have a shading ring around the laminations, and a dc relay doesn't.
 

#12

Joined Nov 30, 2010
18,224
We had this discussion maybe a year ago. There is a reason to use relays the way they were built to be used. You want to hobby a bit? Go ahead. Building a satellite for NASA? Follow the rules.
 

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crutschow

Joined Mar 14, 2008
34,469
As Dodgydave said you need to reduce the voltage if you operate an AC coil on DC because of the lower impedance of the coil to DC versus AC. This is due to coil inductance. If you don't lower the voltage, the coil may burn out.
 

Thread Starter

Man_in_UK

Joined May 13, 2008
180
Cheers to everyone for giving me the answer.

I was going to give a detailed explanation as to why I asked such a question but I don't have time. Satellite's don't build themselves you know.

All I have to do now is try to work out what to do with this uranium!!!!!
 
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