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testing a 2sd1525 darlington ?

Discussion in 'Hobby Electronics' started by mark krawczuk, Sep 7, 2007.

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  1. hi, any body know how to test a 2SD1525 darlington transistor , with a
    digital multimeter ?
    mark k
  2. Phil Allison

    Phil Allison Guest

    "mark krawczuk"

    ** See:

    See diagram called " Equivalent Circuit" .

    With your DMM on ohms, testing from B to E in either direction should read
    2100 ohms ( +/- 15%).

    With your DMM on " diode test", the C- E diode should tests like any
    silicon diode with a very high resistance ( Mohms) in the reverse direction.

    If all that is OK, the devise is likely OK.

    Unless you bought a fake.

    ........ Phil
  3. hi, thanks, mine is buggered, it came outa a fan speed controller from a
    car, in one test it measured something like 35 million ohms, and the otehr
    way 7 million ohms.

    any idea where i can get a replacement , dick smith and jaycar dont have
    mark k
  4. Phil Allison

    Phil Allison Guest

    "mark krawczuk"

    ** An auto wrecker - for another controller.

    Not even Farnell have a similar part to the 2SD1525.

    ........ Phil
  5. Jonno

    Jonno Guest

    Set up a pair as a darlington configuration?
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