Can I use a 600V block with 12V and more Amps?

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=139045
Printed Date: April 28, 2024 at 10:11 PM

Topic: Can I use a 600V block with 12V and more Amps?

Posted By: mascip
Subject: Can I use a 600V block with 12V and more Amps?
Date Posted: June 02, 2015 at 8:53 AM

Hi, I'm thinking of using this Screw terminal block barrier double row on my boat.

Its specifications say: 600V and 15A.
Can I instead use it 12V and 60A?

I am guessing that as an approximation, the temperature depends on the power: 600V x 15A = 9000W, which is much higher than 12V x 60A = 720W. Hence, I think that using it with 12V and 60A is safe. Is it?

Replies:

Posted By: mascip
Date Posted: June 02, 2015 at 11:29 AM

A friend answered my question:

The resistance in the connections is calculated for 15A current (no matter what the voltage is) so it may overheat.

R I^2 means that the power will be solely dependent on the current, which will probably be mostly determined by other components in the system. So the current rating is the same, whichever voltage I apply.

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