SOT23 with marking code A2SHB

[4cx10000]

What would you do if you are searching for a SOT23 transistor with marking code A2SHB and by using alltransistors.com you get 11 possible to choose from?  Which one would you pick? It probably needs some circuit investigation but still ...

[gamalot]

It’s Si2303DS

[fzabkar]

I try to find an image:

https://www.google.com/search?q=Si2303DS&tbs=isz:m,itp:photo&tbm=isch

[amyk]

P-channel version of the very common Si2302DS (A2SHB).

[4cx10000]

Thank you all! My apologies for the typing error in the marking code! It should be A2SHB. Take a moment to check out all the hits for the A2SHB at alltransistors.com and as you see there are in total 11 and 7 with all capital letters. So ... there are 7 possible choices.

[sleemanj]

There is no real way to know exactly which part it is, they are all various manufacturer variants of the "2302" and mark the package the same.

Unrealistically you could characterise the part, and see if it meets the specification of some specific manufacturer's part more closely.

You could decap the part and see if the die has any clues under microscopy, it proabably doesn't though.

The only real way to know, is if you purchased a whole unopened labelled reel of them yourelf, and even then... you got to trust the vendor.

[4cx10000]

Thank you sleemanj!

Vice words! It is not that easy to find the original transistor or an equivalent with the help of a marking code with five characters which are the same for a number of other with same package. This Mosfet is in a high power portable rechargeable led work light and on a small bord containing components for charging a 7,4 volts 8800 mAh Li-ion battery as well as some stuff for a USB connector.

I have one working board though where I was able to see the transistor, which probably was wiped off the other pcb from a previous repair attempt, and the marking code. So … I guess I will have to take some measurements on the working board and that will hopefully reveal in more understanding in which Mosfet to chose. However, I may give it a go with a SK2302AA or Si2302DS as amyk suggested.