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04-01-2021, 03:05 AM
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#1 |
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Senior Member
Join Date: Sep 2018
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Need help to identify a component (diode?)
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! |
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04-02-2021, 03:25 AM
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#2 |
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Badcaps Veteran
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Re: Need help to identify a component (diode?)
This might help you
http://www.s-manuals.com/smd/53 Zener Diodes http://www.s-manuals.com/pdf/datashe..._fairchild.pdf Google search—> SMD diode “53” https://html.alldatasheet.net/html-p...UPA2719GR.html https://www.digchip.com/datasheets/p...A2719M-pdf.php Someone else would have to answer this question for you “ I wonder what is their purpose here. ” I hope this helps you
__________________
9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had  CAPs POOFAll of the mosfet that are taken out by bad caps
Last edited by sam_sam_sam; 04-02-2021 at 03:56 AM.. |
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04-02-2021, 10:43 AM
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#3 |
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Badcaps Veteran
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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? Last edited by R_J; 04-02-2021 at 11:05 AM.. |
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04-02-2021, 11:32 PM
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#4 |
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Senior Member
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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. Last edited by Askic; 04-02-2021 at 11:59 PM.. |
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04-10-2021, 04:15 AM
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#5 |
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Sun Seeker
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Re: Need help to identify a component (diode?)
It looks like a Tantalum capacitor to me too.
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