What component is this?!?!?

Discussion in 'Electronics Resources' started by llaadd, May 15, 2011.

  1. llaadd

    Thread Starter New Member

    Apr 27, 2007
    3
    0
    Hi,

    I have a broken switch for a drill which will cost more to replace then to buy a whole new drill so thought I'd try to fix!

    The switch has a capacitor (separate from the circuit board), resister and what looks like a transistor but I am not sure, one of the middle pins looks like it's been cut off and is not used, and it has this written on it (the ST at the start looks like a logo):

    Code ( (Unknown Language)):
    1. ST  TS8
    2. 2080
    3. F022
    It's the black componend in the middle I'm trying to figure out!

    [​IMG]

    Any advise would be much appreciated.

    Thank you.
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    Could be an SCR or Traic if the drill ha speed control.

    Posting the drill picture with the connection details will help
     
  3. llaadd

    Thread Starter New Member

    Apr 27, 2007
    3
    0
    hi, this is how I understand it, the black strips along with the metal contacts on push button make a variable resister. There is one normal resister which works fine.

    [​IMG]

    The red lines in image blow are where each side of the disassembled switch connects.
    The Green circles are the AC inputs
    The Blue circles are the AC outputs.

    The outputs from the switch just go to the motor.
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    It's an SCR or Triac, remove it and to check it.
    Gate is connected to variable resistor tracks. other two a K & A, or MT2 & MT1

    This is what I found from ST SCR data . Voltage is 800V and current could be around 16Amps.
    Other option is a triac of the same specs.

    I am sure it's one of them, but I would vote for a triac first

    By the way try to resize ur images to 800 by 600. It makes easier for us folks.

    See the data I have and let others also decide what it could be
     
    Last edited: May 16, 2011
Loading...