Smd code to part number

[esinior]

Hi i have a smd part with probably mark "QO 11" or "Q0(zero) 11" on it, and its package is SOT89, i doubt its KTB1260 PNP transistor, but in measuring with diode mode of multimeter it shows number 1.4 between emitter and collector pins and its not open circuit, and .59 from collector to base and .8 from emitter to base , and these numbers doesn't match a pnp transistor, i couldn't find any part number and datasheet for it, does anybody have information for that part number?
I've attached pics of this part
Thanks

[lotas]

https://monitor.net.ru/forum/threads/669255/
https://www.digikey.com/en/products/detail/maxlinear-inc/SPX1431M1-L-TR/2472297

[truclacicr]

It would help to see the part on a photo of the full PCB, or at least the surrounding area.

[esinior]

It would help to see the part on a photo of the full PCB, or at least the surrounding area.

It's a component on the PFC (power factor correction) section of a SPS (switching power supply) and i think it could be a shunt regulator too, but it's named Q on the board, I send pics of board and daughter board

[lotas]

SPX1431M1-L/TR (TL431)

[esinior]

SPX1431M1-L/TR (TL431)

Thanks for your helpful reply, but its smd code due to datasheet is "N011" and my code is "Q011" probably, do u have any comment about it?

[sam_sam_sam]

I did a quick google search and found a part marking with “Q011” but unfortunately this device package has 5 pin but your device is a 4 pin so it not the same part

[lotas]

https://monitor.net.ru/forum/threads/669255/
https://www.digikey.com/en/products/detail/maxlinear-inc/SPX1431M1-L-TR/2472297

[esinior]

https://monitor.net.ru/forum/threads/669255/
https://www.digikey.com/en/products/detail/maxlinear-inc/SPX1431M1-L-TR/2472297

Thanks a lot, i think it's true number, I will test it, middle pin is connected to GND as expected

[esinior]

https://monitor.net.ru/forum/threads/669255/
https://www.digikey.com/en/products/detail/maxlinear-inc/SPX1431M1-L-TR/2472297

Circuit workd with SPX1431
part is correct Thanks for your help

[lotas]

Circuit workd with SPX1431
part is correct Thanks for your help

Ok!