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Some help please to identify a transistor

Discussion in 'Datasheets, Manuals and Component Identification' started by fire ant, May 5, 2021.

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  1. fire ant

    fire ant

    2
    0
    May 5, 2021
    Hello everyone,
    I'm new to electronics and started to delve into the learning more about it.
    I used to work on cars and got some equipment that needs repairs
    Its a portable ignition system and the coil is not getting grounded.
    I think I found the problem at a transistor it has power and signal but not grounding
    The code printed on it is, $ in a circle right after there is a 34 and below that it says D835.
    I cant figure out the replacement part for it.
    Can I get help finding what would be a replacement part. Also where to purchase it?
    Thanks everyone in advance.
    Alex
     
  2. Minder

    Minder

    3,076
    657
    Apr 24, 2015
    There is a 2SD835 device.
    Could be this one.
     
    Martaine2005 and narkeleptk like this.
  3. narkeleptk

    narkeleptk

    43
    11
    Oct 3, 2019
    Snip from datasheet, in case you need to find a substitute,
    Clipboard01.jpg
     
  4. Minder

    Minder

    3,076
    657
    Apr 24, 2015
    That is the one, most likely it.
     
    Martaine2005 likes this.
  5. bertus

    bertus Moderator

    1,753
    675
    Nov 8, 2019
    Hello,

    That could be the one.
    On the transistors the 2S is often ommitted.

    Bertus
     
    Minder likes this.
  6. fire ant

    fire ant

    2
    0
    May 5, 2021
    Thanks everyone. I'm off to look for it .
    Just in case how or where do you look for a substitute part?

    Thank you
     
  7. narkeleptk

    narkeleptk

    43
    11
    Oct 3, 2019
    I like mouser personally, many others like digikey. There are other places but I guess these are 2 of the most common.
     
  8. Harald Kapp

    Harald Kapp Moderator Moderator

    11,413
    2,619
    Nov 17, 2011
    Search for "transistor cross reference". You'll get many hits, e.g. this one.
    Once you've located a possible replacement, check the datasheets. Not every component listed a cross reference may be suitable in reality.
    Common parameters to look for are the max. ratings. If the replacement has higher ratings (e.g. higher VCE, higher gain etc.) chances are it is suitable. If any rating is lower, you'd have to double check this rating against the application, which is difficult if not impossible if you don't have at least a schematic, better yet an annotated schematic with measurements.
     
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