Help me identify this mosfet.

[jurgis1991]

[img src="https://ibb.co/y8nSZBV"][/img]

Dose anyone know where to get datasheet for this mosfet ?
It is used in makita cordless fan.For controlling speed(PWM).

[Doctorandus_P]

Do this in a few steps:

1). Search for a few sites with SMD marking codes.
2). Type the code on your FET into a few of those sites.
3). Compare results.

[fzabkar]

AOI4144, Alpha & Omega, n-ch MOSFET, 30V, 55A, 8mOhm Rdson:
https://media.digikey.com/pdf/Data%20Sheets/Alpha%20&%20Omega/AO(D,I,U)4144.pdf

[jurgis1991]

Thanks for the help.How did you found out what device it was ?

[PA0PBZ]

If you google for "I4144 mosfet" it's on top of the hits.

[Audiorepair]

I googled for 14144 Mosfet when this post first appeared, and found nothing.

Now I realise the part is actually I  4144   where I is the letter "I", not the number 1.

[PA0PBZ]

I googled for 14144 Mosfet when this post first appeared, and found nothing.

Now I realise the part is actually I  4144   where I is the letter "I", not the number 1.

Yes, that's the difference between not finding anything and having it done in 10 seconds, been there, done that 

[Audiorepair]

One might think that manufacturers would try and avoid using letters such as I and O in their nomenclature, especially since devices are nowadays so much smaller and difficult to identify, particularly when they are burnt or blown up.

[fzabkar]

How did you found out what device it was ?

I recognised the logo, so that helped a lot.