Transistor Equivalent

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Med-Tech
    Member
    • Jan 2024
    • 26
    • Germany
    #1

    Transistor Equivalent

    Hello, quick question. I am looking for an equivalent Transistor for a 9Bt. Not been able to find anything of use online, therefore I m reaching out to you all. I have found this 9bt is a MMBTRA109SS.

    Thanks for looking and assistance.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30977
      • Albion
      #2
      search local sources,
      those are usually called "digital transistors" or "pre-biased transistors"
      a common type starts with DTA
      the datasheet says the 109 is using 47k and 22k resistors
      Attached Files

        Comment

        • truclacicr
          Badcaps Veteran
          • Apr 2019
          • 298
          • australia
          #3
          9B* = PMMT591A

          https://www.mouser.com/datasheet/2/916/PMMT591A-2938678.pdf

          https://www.amazon.ca/pcs-Transistor-PMMT591A-SOT-23-SOT-23-3/dp/B0973VVTWT           (photo)
          Last edited by truclacicr; 06-09-2024, 06:47 PM.

            Comment

            Previous template Next

            Related Topics

            Collapse
            • MirceaL
              Equivalent for A965 transistor
              by MirceaL
              Hi Guys,

              I am currently working on fixing an active subwoofer and found 2 bad transistors. One is A965 and the other one is C1815.

              C1815 is easy to find but A965 not so much , at least where I live (Romania).

              Can anyone help me identifying an alternative / equivalent for this , A965, transistor ?
              Is there an online tool / engine that I can use that could help in this ?

              Thank you
              Mircea
              01-13-2023, 01:29 PM
            • Nevillet
              2SB633 PNP transistor equivalent suggestions Marantz PM310
              by Nevillet
              Hi All,
              I have a 30+ year old Marantz PM310 that is blowing fuses. It appears that one of the output transistors (Q732) is shorted (Q731 is fine). It's a 2SB633 which does not seem available from the usual suppliers. Is there a more modern equivalent which would do the job?

              The complimentary NPN (Q729 & Q730) is a 2SD613.

              I have attached the service manual.
              Many thanks.


              https://www.badcaps.net/forum/attach...1&d=1629738387...
              08-23-2021, 11:22 AM
            • magneh
              Behringer Eurolive B205D repair - help identifying transistor
              by magneh
              Hello
              Got this speaker from a friend , defective. Power led comes on and off , in a loop.
              Disassembled, got the board out, and after a bit of measuring I found a low resistance on a 5v6 line. With a bit of current I found a transistor heating up on that line (labeled T1 and 113 as on pic).
              After removing this guy, I got a value of 0.7 in diode mode on that 5v6 line, which before had 0.02 or something like that.

              I tested powering it up without the IC, and the speaker turns on and stays on, and works fine

              Still, I need to replace this transistor....
              06-18-2025, 02:34 AM
            • elsomer
              help to identify transistor msi ms-15ck1
              by elsomer
              hi people, i need some help to identify a transistor(q14) that is missing on the board, so the gpu has no voltage i think that q14 activate the phases for gpu, but i dont have schematic or boardview, but i think its the same transistor than q15 and q16, thanks...
              1 Photo
              02-17-2025, 05:30 PM
            • rddube
              Help with blowing transistor NAD T752 receiver
              by rddube
              Hello everyone,

              I guess I need help from the masters to try and find what is frying a 2SC5669 transistor on the left channel of this front center Amp for a NAD T752.

              Was working perfectly and all of a sudden I heard a pop, and then a glow from the amp. Not only did the 2SC5669 burn a leg, but R520 which is a 220 ohm resistor partially burned - it now measures 110 ohms.

              I bought this amp second hand fairly cheap as it was not working, it went into protection mode. I finally traced it down to the same transistor Q510, the one that just popped. It was shorted...
              09-01-2022, 05:19 AM
            • Loading...
            • No more items.
            Working...