Looking for ideas for distributing different DC voltages

[EBRAddict]

I have a project box I'm putting into my car. My project uses the car voltage 13.8VDC, which feeds a battery backup module, which feeds a switching converter down to 5VDC which then feeds a couple relays controlled by a micro. I need multiple taps off each so there'd by 5 rails including ground. 5A is the current limit on the ground return.

Is there some off the shelf part with isolated rails and quick disconnects, or something similar to this?



Right now I'm using a piece of FR4 I've roughly routed out and drilled for separate rails. If I can't find anything off the shelf I'll just get a PCB made.

[EBRAddict]

Getting somewhere, I found these on Digikey/Mouser:



http://www.digikey.com/product-detail/en/keystone-electronics/1008/36-1008-ND/315144

[Codebird]

My project uses the car voltage 13.8VDC

Car voltage is 13.8V nominal - actual voltage from 9V (When the starter is running) to 25V spikes (Sudden load drop when the alternator is spinning at full speed). Plus noise from the ignition and all the motors. If you're doing an automotive project, make sure your DC-DC converter can handle such an unpredictable input.

I suggest you look at car or boat fuse boxes - they not only make good distribution boards, they give you a fuse on every line too.