Question about 12V DC power supplies
#1
06-26-14, 12:46 PM
Join Date: Jun 2014
Posts: 3
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Question about 12V DC power supplies
Hello,
It has been so long since I studied basic electricity that I cannot remember some of the most basic info. Perhaps someone here could assist. Can you safely use a 12 volt power supply rated at 30 amps to power a 12 volt 5 amp device? Does the 5 amp device only use 5 amps of the available power or will using a 30 amp power supply fry the 5 amp device?
Thanks for your help
It has been so long since I studied basic electricity that I cannot remember some of the most basic info. Perhaps someone here could assist. Can you safely use a 12 volt power supply rated at 30 amps to power a 12 volt 5 amp device? Does the 5 amp device only use 5 amps of the available power or will using a 30 amp power supply fry the 5 amp device?
Thanks for your help
#2
06-26-14, 01:17 PM
Group Moderator
Welcome to the forums.
You can use a larger current power supply to run a lower current item. It would be a good idea to fuse the line to the device at the maximum supply size that should be used.
So use an inline 5A fuse and you should be all set.
I work on a lot of mobile equipment and have a 13.8vdc @ 90amps power supply feeding my bench. I have a bank of circuit breakers that I can switch inline to protect the device I'm working on.
You can use a larger current power supply to run a lower current item. It would be a good idea to fuse the line to the device at the maximum supply size that should be used.
So use an inline 5A fuse and you should be all set.
I work on a lot of mobile equipment and have a 13.8vdc @ 90amps power supply feeding my bench. I have a bank of circuit breakers that I can switch inline to protect the device I'm working on.
