Help finding a resistor

[Gimi]

Hi. Just need if possible for anyone to find this resistor PR801 where to get it from ? Thank you

[stj]

Re: Help finding a resistor

everything you need is there.
1206 is a package style,
0.01ohms - very low that, it wont come cheap.
1% tolerance
D - ??? dont know that reference.

what is it on? i may be able to get one from a scrap pcb

[Gimi]

Re: Help finding a resistor

Hi. Thanks for the replay .it's from a dell e6230 motherboard

[Gimi]

Re: Help finding a resistor

Hi. Would this eBay part number be correct:112368746577? Thank you

[stj]

Re: Help finding a resistor

maybe, i would try RS first.
but before you do, what is wrong with the old one?
these things dont fail - they are only killed by something else!

[Gimi]

Re: Help finding a resistor

Got this from a friend to try repair. Is making a short , when battery and power supply both attached then power supply dies. Tested a few things and this shows the problem (hopping this is the one anyway lol). Thanks and will try rs.

[stj]

Re: Help finding a resistor

0.01ohms is supposed to look like a short!

[mariushm]

Re: Help finding a resistor

That's a current sense resistor... it has 4 terminals because two terminals are supposed to connect to the big traces carrying current and the 2 thinner traces are going to an opamp or something that would measure the voltage drop across the resistor.

Here's some examples of such resistors:










Depending on the circuit board footprint you probably could use plain 1206 resistors .. just make sure you get the ones with the proper orientation (terminals on the long side or the narrow side)

Here's a start link for you in UK (also check http://cpc.farnell.com with smaller selection but selling as little as 1pcs of some parts and cheaper or free shipping in UK) : http://uk.farnell.com/c/passive-comp...6-3216-metric-


Also ... make sure the resistor is actually bad, because you may confuse it for a short due to having so low resistance. Use the REL button on your meter to take out the resistance leads and then measure the resistor when it's desoldered from the board.
It should measure 0.1 ohms.

Later edit: You should also be able to squeeze 0805 resistors on the footprint, just may have to put a couple of blobs of solder on the pads to solder the smaller resistor well. Then you'd have a much wider selection.