Identification of SOT-23 device

Question

I have a small SOT-23 (3 pins, transistor-like) device that burned out (shorted between 2 pins). I need to identify it so i can replace it.

It belongs to an Asus mainboard and after it burned down the SSD1 interface (on the left) 1 stopped working (no damage to the HDD).

The marking on it seems to be 018 ⊃

Any help would be apreciated.

Can you remove that component and then use your multi-meter to tell us what voltage each pin has? (aka where is each pin connected. To 5V? GND?) — Christianidis Vasilis, Commented Mar 15, 2021 at 0:22
@ChristianidisVasileios How would you be able to tell that? Pins don't have voltage when removed from a circuit, you can tell resistance and which may be connected together, but I'm not sure how you can identify which is GND and Supply...? — Ron Beyer, Commented Mar 15, 2021 at 2:13
I meant the pins on the PCB, not on the component. Remove the component, and measure the voltage on the PCB. — Christianidis Vasilis, Commented Mar 15, 2021 at 9:58
@ChristianidisVasileios I cannot desolder it right now I've been looking at some similar mainboard schematics and it could be a N-MOSFET 2N7002K I't a common SOT-23 around that area — Angus, Commented Mar 18, 2021 at 14:37
It probably is either a mosfet or a BJT transistor, its base being the right pin, and the top and bottom left the source and drain — Christianidis Vasilis, Commented Mar 18, 2021 at 14:40

vivier · Accepted Answer · 2023-11-19 11:42:23Z

3

The marking is "01B" in fact if you zoom more and the marking format is typical from Onsemi (dot below and sideways character for traceability).

Then this is probably a LP2301BLT1G / T3G from Leshan Radio Company (Onsemi and LRC are associated in China (source) ).

Picture from LCSC:

answered Nov 19, 2023 at 11:42

vivier

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