Can someone help me identify this SMD??

[PeterPumpkin]

Would some kind soul out there help me identify this component?


http://www.members.optusnet.com.au/b...images/smd.jpg

From what i can make out, the values on it are "AE 84A G".

It came out of a USB hard drive which had it's power input damaged and it must have shorted this component. From what i read this is a polarised capcitor but i'm not sure, and am totally confused by the values on it too.

Thanks!!

[kikkoman]

Re: Can someone help me identify this SMD??

I'm pretty sure this is a 1 or 2A Schottky diode.
that logo points to General Semiconductor who were acquired by Vishay.
i couldn't find a datasheet with these exact markings and Vishay has several '84A' schottkys ranging from 30V to 1000V and between 1 and 2A.
it might be used as a reverse protection diode. in this case, i suggest you simply go with the higher current rating and the voltage depending on the circuit.

you should be able to replace with any similar rated schottky.

[PeterPumpkin]

Re: Can someone help me identify this SMD??

Thanks Kikkoman,

I love this place! It's the first time I've heard the term Schottky. I even have trouble pronouncing it!!

Just did a quick search on eBay for the component. Would it be better if i got a 1a 30v or a 1a 40v to replace it? Or is neither advisable??

[kikkoman]

Re: Can someone help me identify this SMD??

yea, you can learn lots of stuff here.

basically, a schottky diode is a fast diode with low voltage drop.

can you post a picture of the damaged board? it would help determining how exactly it is used and if other components could be fried.

in case your HDD case has a 5V and/or 12V power supply (as most cases do) either voltage rating has enough reserve.
you should definitely use a part with a higher current rating though (1A might even be too low for a 2.5" HDD).

[stj]

Re: Can someone help me identify this SMD??

it's a "shot"-"key" diode.
probably

[PeterPumpkin]

Re: Can someone help me identify this SMD??

Ok, this is the motherboard.



The hard drive is a 3.5 inch one. You can see the burn marks near the bottom left of the pic. It was plugged into an external USB box. When it was found not to be working, we plugged it into another usb case, but it didn't power up. So i tried it on a 3rd usb case, and it cause one of the chips on the usb case to light up light a lamp! It was very pretty, but killed the case...

I'm could also get 3a "shot keys" but am still unsure which i should use. I'm basically willing to give anything a gamble because the drive is dead as it is and if i make it worse, will just shop around ebay for a similar hardrive to get its mb. Just trying to retrieve data off the thing is all..

Man, I've learnt there are 3 certainties in life. Death, taxes and problems with computers!!

[boxy]

Re: Can someone help me identify this SMD??

84A is a Vishay SS2PHx 2A Schottky rectifer. Unfortunately you can't tell what the reverse voltage rating is from this number, but a SS2PH5, 6, 9 or 10 will do here (multiply the number by 10 to get the voltage).

Funny, I've got a reel of 3000 samples of them in a box in our lab. If you want to come up to the UK to pick some up feel free, but that drive is dead unless you caused a short with a screwdriver or something and are lucky.