Need help identifying and replacing component

[phlox]

Hey all, so i just received a cheap ebay 12v DC Temperature controller which in my haste i connected it up wrong and fried a component marked q1. now the relay is not switching anymore..any ideas?

http://www.ebay.com/itm/272036158854?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

link to the device

 

[Minder]

Q usually indicates a transistor.
Does it have any identifying marks or how many leads?, If not the only hope is to try and reverse-engineer it and attempt to come up with a sub.
There is only Four terminals!

 

[phlox]

the only markings i can now see are a " J " and it has 3 legs on one side and a tag at the top.

i found the schematic if that would help

in the second pic bottom left corner above the hole is Q1


[Mod edit ... 3 legs]

 

[phlox]

i actually just found a pic on google showing the component where by i could read the markings.

Its an S8050 NPN Transistor

Now i just need to find a replacement.. Thank you for your help.

 

[Alec_t]

Almost any general-purpose NPN switching transistor can replace Q1.

 

[Minder]

With those existing resistors, you could even drop a 2n7000/2n7002 in there that should work.
M.

 

[phlox]

hey thanx all, i found an replacment ( PMSS3904) from an old LCD Monitor PSU and the specs are basically the same except the replacement can go a bit higher in voltages but i replaced it and all is good.

Thanks for all the help.