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Thread: MPS2111 datasheet/info needed.

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  1. #1

    Default MPS2111 datasheet/info needed.

    All I know that this is the bipolar transistor with built-in resistors. I'd like to know value of these resistors and hFE of transistor, so I can assemble an replacement.

  2. #2
    Join Date
    Aug 2004
    Location
    Ash Fork, AZ - 60 miles south of the Grand Canyon, off of Route 66.
    Posts
    803

    Default

    This doesn't seem to be an easy part to find. I found the following information on http://an.hitchcock.org/repairfaq/sam/strbfaq.htm.

    "The MPS2111 (Q3) is a PNP transistor which has an internal resistor network in its base-emitter circuit. These devices are sometimes called 'digital transistors' since they can be used as simple buffers or inverters without additional input components. The values of the series and shunt resistors are both 10K for this particular part."

    At another place I found this circuit for a strobe light for a model rocket.

    Flash_Strobe.jpg

    Between the two you should have enough information to sub a transistor and a couple of 10K resistors.
    73, Martin, K7MEM
    Ash Fork, AZ
    [URL]http://www.k7mem.com[/URL]

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  3. #3

    Default

    Thanks, I've seen that schematics at another place "Kodak max flash", but it had no info about it, thanks!

  4. #4
    Join Date
    Jan 2011
    Location
    Houston Texas
    Posts
    5,739

    Default MPS2111 PNP with 10K resistors

    Quote Originally Posted by 4L4AGU View Post
    All I know that this is the bipolar transistor with built-in resistors. I'd like to know value of these resistors and hFE of transistor, so I can assemble an replacement.
    The Resistors are 10K

    Maybe this will help you.

    http://LCSC.Net/KA9JLM/MPS2111.pdf

    Have a great day.

    73
    "Theory only works perfect in a vacuum." KA9JLM Don

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