How to determine whether the screen printing is M2W chip model?

[zhangxiansheng]

I am currently trying to fix a board and I found this SOT23 component labeled M2W, but I can't find this IC model.

Using a multimeter to measure this chip, it is found that

• the junction voltage between pin3 (positive) and pin1 and pin2 (negative) of this chip is 0.7 V,
• there is a voltage of 0.2 V between pin1 and pin2, and
• there is also a voltage of 0.2 V between pin2 and pin1.

Please help confirm the chip model or recommend a chip model with similar performance.

[zhangxiansheng]

I was told to suspect a BFR31 from Phillip Semiconductor, but I replaced a BFR31 chip onto my circuit board and found that it was not working properly

[zhangxiansheng]

[fangfang]

Hi @zhangxiansheng .

Unfortunately, We can't confirm the part number depends on the information you provided.

Sorry for the inconvenience may cause.

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-----------------------------------------------------------------------------