Hi.
Please i need your help to identify this SMD component. Im sure is it a kind of MOSFET, but i need to know if it is P or N channel.
Marking on it says:
B20
P03
ECA3126
I searched it for hours, but no luck, did not even find out manufacter. Looks like noone knows that logo.
TIA

 

Is this from an ASUS netbook? If it is, then which model? If it isn't , then where is it from? Why do you think it's a Mosfet?
Can you take a better picture ? The logo looks like a "μ" with a small "o".

Does it have an big exposed pad on the back?

 

Yes it is from ASUS K50AF placed near power suply conector. There are two of them.
There is no big exposed pad on back.
I try make better picture. The logo is like M, but not with V in middle but a U.
I think is it MOSFT, because in most notebooks they are in this place. And on PCB are only 3 pads. 4 pins on one side are together, on other one single pin and last 3 together. So im sure is it an transistor.

 

Well, that's a hard one. Have a look here, I may have overlooked it. http://how-to.wikia.com/wiki/Howto_identify_integrated_circuit_%28chip%29_manufacturers_by_their_logos/all_logos

What is the exact pinout?
Is the 3pin and 4pin terminals shorted ?

 

Pins 1,2,3 are sorted, making one pin on board, pin 4 is alone and pins 5,6,7,8 are sorted making one pin on board. That is what make me think is it a transistor.
Something like this http://www.aosmd.com/pdfs/datasheet/AO4452.pdf
Thanks for the page with logos, this logo is not there. Maybe some new manufacter.

 

Problem solved.
Have no idea what it is, but it can be replaced with P-Channel Enhancement Mode FET AO4407 from AlphaOmega.
Im not proud of way how i maked it, but it works

4407 datasheet http://www.aosmd.com/res/data_sheets/AO4407.pdf