Trigger 48V Relay With 12V Source?

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=147273
Printed Date: May 02, 2025 at 9:33 AM

Topic: Trigger 48V Relay With 12V Source?

Posted By: iceberg62
Subject: Trigger 48V Relay With 12V Source?
Date Posted: February 26, 2022 at 1:39 AM

I'm hoping someone can help me work through this issue. I'm trying to replace my 48v golf cart key switch with a latching push button. The key switch basically connects the 48v battery pack to the solenoid. Can someone walk me through how that would work? Would I need a 48v relay? Can I trigger a 48v relay with a 12v source?

I don't know what I'm talking about here but my guess on this would be to use a 48v relay:
1) 48v Batter to 12v reducer
2) 12v reducer to switch
3) Switch to 86
4) ground to 85 (Which ground? 48v battery ground or 12v reducer ground)
5) 30 - 48v in
6) 87 - 48v out

OR...Scrap this plan, there's a better way. If there is a better way, what is it?

Replies:

Posted By: audiokid1
Date Posted: February 26, 2022 at 11:26 AM

You may just try sticking with 48VDC components to eliminate the need for a voltage regulator or a 48VDC relay with 12V coils.

48VDC Latching Switch

48VDC Relay

Posted By: iceberg62
Date Posted: February 26, 2022 at 9:17 PM

I think I solved the problem. Use a solid state relay that allows low voltage to switch high voltage. So I can use a 12v switch to open and close the contact on the 48v side. I'd love any other ideas if anyone has them.