High Current Bus bar to PCB mount Help

masa6614 · Nov 29, 2010

Hi,
I'm trying to get 200Amps onto a PCB, however space is somewhat limited and all the typcial connectors I see seem to be really oversized, and I just need one single connection, so I saw this online and thought it might work. However I cannot find out the part number or even the name of the part. I'm not sure if its a custom part, or they sell them with current ratings and various stud sizes. Does anyone know where I can get this L bracket with stud hole one one end and PCB solder pins on the other? Or any other better way to get this much power on the board easily?

Thanks alot.

IRstuff · Nov 29, 2010

> You really haven't given sufficient information about voltage, transient performance, switching characteristics, etc. to evaluate any sort of solution
> It's highly unlikely that you're going to get 200A through three pins; the current crowding would potentially generate so large an IR drop that'll swamp out your unspecified voltage requirements.

TTFN

FAQ731-376

masa6614 · Nov 29, 2010

Thanks. yeah, thats why I'm trying to find out more about that part or similar parts, where they can specify voltage/current ratings, max temp rises, etc. But I currently cant even find anything or what a part like that is called and who manufactures it, Im currently thinking of using 'power taps'(

http://www.erni.com/powertapfront.htd

) , but wanted to look into other options.

My application would be 24Vdc nominal, with a maximum steady state current of 200Amps.

IRstuff · Nov 29, 2010

That means that you can only tolerate ~5%*24V/200A or 6 milliohm in the entire circuit, a nontrivial exercise.

TTFN

FAQ731-376

MikeHalloran · Nov 29, 2010

Maybe you can just laser cut copper plate to the shape of the circuit you intended to etch into the PCB.

I.e. copper 'foil' thick enough to carry that kind of current will probably be thick enough to be self-supporting. You might need a separate sheet of FR4 to support the components.

Mike Halloran
Pembroke Pines, FL, USA

drawoh · Nov 30, 2010

masa6614,

Take a look at Automation Source Technologies. They make pancake motors. Their armatures basically are PCBs with very thick tracks.

They may be willing to help you.

JHG

masa6614 · Dec 6, 2010

Thanks for the suggestions, i'm looking into these from amphenol, their RADSOK products, they seem to go up to 70 Amps. Just not sure how to get that little cylinder insert to come out of the busbar, maybe you've got to buy their busbars.

http://www.amphenol-aerospace.com/new/pdf/pds-205_pcb.pdf

IRstuff · Dec 6, 2010

Perhaps, you should be looking at their full catalog for that product line.

http://www.amphenol-industrial.com/new/catalogs/SL-391/lo/SL-391.pdf

TTFN

FAQ731-376

mcgyvr · Dec 7, 2010

Don't forget to get pricing before you go too far with the Radsok products. Amphenol thinks very highly of that connector (and many of their other products too). I can almost guarantee you will see the price and move on.
You could have the part you posted in your first post fabricated for much..much less.

200A and "space is limited" on a PCB just doesn't sound like a good idea.

MikeHalloran · Dec 7, 2010

Just noodling around with an online via calculator, I'm guessing you'd need copper 'foil' with a minimum thickness around 37 mils. Can you even get anything like that? Can your board maker deal with it?

Mike Halloran
Pembroke Pines, FL, USA

masa6614 · Dec 7, 2010

i know,
for the output connector I was gonna use two D-subminiature connectors with 8 #8AWG contacts (

http://www.conec.com/catalogs/c1/io...ination-d-sub-connectors-2w2-3w3-5w5-8w8.html

) to distribute the power out to various places, but to get the power onto the board, I've got a single source, and so thought I could save connector space by not having to have a bunch of pins, but only a single point. And i'm doing my best to limit the board power dissipated to less than 20W, ignoring all these connector's contact drops, though i'm sure they'll start really adding up. And at the moment cost isnt too much of an issue til someone higher up says to find something cheaper.

drawoh · Dec 8, 2010

MikeHalloran said:
... I'm guessing you'd need copper 'foil' with a minimum thickness around 37 mils. ...

This is why I suggested looking into pancake motors. The pancake motor sitting on my desk has armature tracks that appear to be around .010" thick. They can probably go thicker.

JHG

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

High Current Bus bar to PCB mount Help

masa6614

Electrical

IRstuff

Aerospace

masa6614

Electrical

IRstuff

Aerospace

MikeHalloran

Mechanical

drawoh

Mechanical

masa6614

Electrical

IRstuff

Aerospace

mcgyvr

Mechanical

MikeHalloran

Mechanical

masa6614

Electrical

drawoh

Mechanical

Similar threads

Part and Inventory Search

Sponsor