May i ask you what the difference between BD139, BD139-10, BD139-16?

[Peter BENSCH]

Unfortunately, it is easy to overlook the information on this in the data sheet, table 4: the suffix after the - indicates the hfe range:

• BD139: 25/40...250 (full range)
• BD138-10: 63...160
• BD139-16: 100...250

Does it answer your question?

Regards

/Peter

[VICTOR1]

HI Peter,

Thanks for the answer but it is BD135-16 & BD136-16, not the BD139-16 & BD139,

i am afraid i purchase the wrong materials..

just want to clarify the BD139, BD139-10 & BD139-16, seems it is same parts....but not logical show with difference items, is these same components with difference packing only? Thanks.

[Peter BENSCH · Accepted solution]

Well, I don't really understand your issue.
BD135 (npn) and BD136 (pnp) can work up to 45V.
BD139 (npn) and BD140 (pnp) can work up to 80V.
The suffix denotes the hfe range (current gain of a bipolar junction transistor) as mentioned before, i.e. a selection of devices.
Clear now?
Regards
/Peter

[VICTOR1]

mm.., thanks for the explanation.~