Need help to identify a component (diode?)

[Askic]

Hello guys,

can you please help my identify components with numbers 53 and 59? They could be a diodes?
This component 53 is connected in parallel between source and drain of a P Channel A2179 Mosfet.
I wonder what is their purpose here.

Thank you!

[sam_sam_sam]

Re: Need help to identify a component (diode?)

This might help you

http://www.s-manuals.com/smd/53


Zener Diodes

https://cdn.badcaps-static.com/pdfs/...57602c93cc.pdf

Google search—> SMD diode “53”





Someone else would have to answer this question for you

“ I wonder what is their purpose here. ”


I hope this helps you

[R_J]

Re: Need help to identify a component (diode?)

The thumb nail picture is too small, there seems to be other markings (above the 59) on the devices? Since there are 3 in parallel I would almost suspect they are capacitors?
What is the board from? any numbers on the board? Can you tell how the circuit is used? is the mosfet just used as a switch?

[Askic]

Re: Need help to identify a component (diode?)

Thank you sam sam sam.
R_J this is from Fujitsu H700 laptop board. I have no schematics, but I can guess that Mosfets are used for protection since thea are in close proximity of the batery. There is a current sensing resistor there.

[dicky96]

Re: Need help to identify a component (diode?)

It looks like a Tantalum capacitor to me too.