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Old 21st January 2013, 09:00 PM   #1
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Default Suggestion for TO-220 PNP BJTs?

Does anyone have a suggested TO-220 PNP BJT for use as part of a compound (Sziklai) pair in an output stage? Something available at Mouser or Digikey. I do not need an NPN compliment in this application.

Thanks.
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Old 21st January 2013, 09:09 PM   #2
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Maybe BD244?
It is an easily-obtainable and common device.
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File Type: pdf BD244.pdf (38.3 KB, 21 views)
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Old 21st January 2013, 09:47 PM   #3
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MJE2955 (PNP) & MJE3055 (NPN) (60V, 10A) are probably the best known TO220 power devices.

MJE15033/MJE15032 (250V 16A 50W), TO220.

In TO-126 MJE350 & MJE340 are good for 300V, but only 500mA.
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Old 21st January 2013, 11:41 PM   #4
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You don't say whether it's the driver or output transistor or what power level, Hi-fi or G.P. you want. There are some big chips in TO220 cases (BD912, MJE2955 etc.) but you wouldn't use them as drivers and vice-versa. The MJE150xx series are excellent drivers for medium-high power as well as 2SA1837 (TO220F).
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Old 22nd January 2013, 12:52 AM   #5
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Senior moment. How fast is a BD244? Maybe I've forgotten how to read a data sheet but I don't see anything in that Fairchild sheet about speed.

G
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Old 22nd January 2013, 03:27 PM   #6
wg_ski is offline wg_ski  United States
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It's a TIP42, if that means anything to ya.
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Old 22nd January 2013, 07:27 PM   #7
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Thanks for the suggestions. This is for an output stage, but a fairly low power one. I think the 2SA1837 looks like the best place to start.
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Old 23rd January 2013, 06:09 AM   #8
sajti is online now sajti  Hungary
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Or 2SA1930...

Sajti
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Old 23rd January 2013, 07:45 AM   #9
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Quote:
Originally Posted by wg_ski View Post
It's a TIP42, if that means anything to ya.
It does but I have only your word for it. It's not that I don't trust you but shouldn't the datasheet be more complete? I've heard of reading between the lines but there aren't even lines.

G
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Old 23rd January 2013, 09:10 AM   #10
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D44H11 and D45H11 ?

http://www.onsemi.com/pub_link/Collateral/D44H-D.PDF

Last edited by powerflux; 23rd January 2013 at 09:13 AM.
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