testing a 2sd1525 darlington ?

"mark krawczuk"

See diagram called " Equivalent Circuit" .

With your DMM on ohms, testing from B to E in either direction should read

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

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 anything. mark k

"mark krawczuk"

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

....... Phil

Set up a pair as a darlington configuration?