Basically I need some 2n3055 to3 cased (preferably)style Bipolar (hello philthy) trasistors with a higher voltage rail around 80 to 100 vdc Suggestions ?
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Pass Transistors
May 04, 2011
12 Replies
**Depends on the application.
Trevor Wilson
www.rageaudio.com.au
Do a parametric search.
?? 100% natural
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I don't have one of those in the junkbox O do have some 2n3773
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You don't keep it in your junkbox:
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Hear that woooosshhhhh ?
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Try MJ15003. Vce 140 V Ic max 20A Jaycar have them for around $8 TO 3 case. Essentiallly a big 2n3055.
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Thanks , depends if the junkbox has any there is around 35 years collection of good crap in the container :)
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What's your application ?
atec77 wrote:
Posted at www.usenet.com.au
Large 48v linear power supply , now running quite well although I had to buy a voltage reg :( junkbox let me down
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You used to be able to get 100V versions of 2n3055's. I used some in an amplifier back in the seventies.
You could try 2n3442's or whatever they evolved into/replaced them.
"fred"
** Motorola brand 2N3055s ( in Aluminium TO3 packs) were usually capable of *sustaining* 120 to 140 volts with the base and emitter shorted. But this was not much use in practice as the collector current had to be kept to no more than a few mA at such high voltages. The Safe Operating Area (SOA) specs allowed up to 1.5 amps at 60 volts Vce for 1 mS.One of the best available NPN power transistors is the MJ15024 - it has a SOA spec of 2 amps at 80 volts Vce for 0.5 second - with an upper limit of
100mA at 250 volts.By comparison, power MOSFETS walk all over these devices.
.... Phil
I measured several claiming to be 100v capable 2n3055 , a large variance in the performance was of concern as I think some are cheap asian copies , I found sufficient junkbox transistors to do it and they fitted the heat-sinks I already had
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