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Old 20th Mar 2018, 12:21 am   #6
MotorBikeLes
Nonode
 
Join Date: Dec 2012
Location: Kirk Michael, Isle of Man
Posts: 2,346
Default Re: Telequipment D54 ?

Like WME-Bill, I have tested many of these in the past. For a failed dual FET, I select a pair, I wrap some silver plated copper wire round one, carry it to the second and wind there - gives good thermal equivalence. -- I have a CT71 curve tracer, but there are many simple test circuits that will provide FETs characteristics. Don't forget with a faulty dual FET, one half may still be good to provide correct data.
BFW0265 -- I have not tested any, but it appears that they were UC products, under type No. KEM103. I MAY have one somewhere. They were used in the type JD plug-ins as used on D53, D53S, DM53A as well as your D54.
BFW1052. IDss range 8 - 11, -VGs, range 0.9 - 1.5. UC734 a good candidate, maybe also UCS2410 or BF245B.
If you buy a few plastic encapsulated BF245A,B and C, you can probably select something for any job. Similarly, a good range on metal clad BW10,11 and 12s will cover a wide range.
Les
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