You could try trawling the list this site gives on a search..........
2N3773 Transistor Datasheet. Equivalent transistors for 2N3773 - Parameters and Characteristics. Electronic Component Catalog.
I've heard that the 100v SOAR performance was 100% guaranteed with 2n3773s though, and that's a rarity.
2N3773 Transistor Datasheet. Equivalent transistors for 2N3773 - Parameters and Characteristics. Electronic Component Catalog.
I've heard that the 100v SOAR performance was 100% guaranteed with 2n3773s though, and that's a rarity.
The 2SC5200 is a good match electrically, but not mechanically as the cases are very different.
How about the MJ15003? It also comes in a TO3 and the pins are the same. It's billed as Vceo 140V, Ic 20A, Pd 250W, hfe 25-150, fT 2Mhz. The numbers for the 2N3773 are 140V, 16A, 150W, 15-60, fT not stated. Looks like a good match. 😀
The MJ802 could also work. Its only 100V, but the rest looks good at 30A, 200W, 25-100, 2Mhz. If your circuit runs off 40V or below rails you will be OK.
How about the MJ15003? It also comes in a TO3 and the pins are the same. It's billed as Vceo 140V, Ic 20A, Pd 250W, hfe 25-150, fT 2Mhz. The numbers for the 2N3773 are 140V, 16A, 150W, 15-60, fT not stated. Looks like a good match. 😀
The MJ802 could also work. Its only 100V, but the rest looks good at 30A, 200W, 25-100, 2Mhz. If your circuit runs off 40V or below rails you will be OK.
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check out 1) and 4) (the TO-3 versions) by post#1 about
http://www.diyaudio.com/forums/soli...istor-families-audio-power-output-stages.html
possibly a re-design is necessary (independend of the application resp. the kind of use - please note the higher values for Ft).
http://www.diyaudio.com/forums/soli...istor-families-audio-power-output-stages.html
possibly a re-design is necessary (independend of the application resp. the kind of use - please note the higher values for Ft).
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Is really necessary to replace the transistor?
At Farnell India you can find good 2n3773 from many manufacturers:
Transistors - Bipolar - (BJT) Single | element14 India
Regards,
At Farnell India you can find good 2n3773 from many manufacturers:
Transistors - Bipolar - (BJT) Single | element14 India
Regards,
DigiKey will sell them for $3.04 and has 811 of them. Are you asking for improved devices?
G²
The 5200 gets no where near the cold, nor the hot, SOAR performance of the 3773.
It cannot be a replacement where SOAR has been used by the designer.
It cannot be a replacement where SOAR has been used by the designer.
For SOAR performance, check out the MJ21194. The datasheet gives 2.5A, 80V for one second.
Other numbers are Vceo 250V, Ic 16A, Pd 250W, hfe 25-75, fT 4MHz. Might be the one to go for, but the high-ish fT _could_ be a problem in some circuits (strange as it may sound).
Other numbers are Vceo 250V, Ic 16A, Pd 250W, hfe 25-75, fT 4MHz. Might be the one to go for, but the high-ish fT _could_ be a problem in some circuits (strange as it may sound).
That may not be the transistor's fault. Just replacing it with something "better" may not improve how it sounds. It may make surprisingly little difference what transistor(s) are in there.
It's in the datasheet, 100% tested.
No other transistor can match this 150W @ 100Vce for a 150W device.
It is unique.
There is no substitute, there is no alternative.
There are second source. The alternative manufacturers use the SAME type name 2n3773.
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95% of MJ21196 and nearly that many MJ21194 would also pass a 1.5A/100V SOA test. It's just not guaranteed - nor is it even required in an audio application for which the 3773's VCE capability is suitable. If you need a replacement, just use a 15024, 21194, or 21196. It will work, not oscillate and not blow up. Second source 3773's are probably not up to the standards of the original Motorola device anyway.
FWIW - some of the Jap devices really sandbag the specs on their devices. Back in the day, the original Toshiba 2SD424 would routinely pass the 2.5A/100V 2N6259 SOA torture test. There were others as well - probably the 2SD555. The 424 was rated 70V/1A for I s/b. The real capability of the C5200 is probably pretty high as well. The QSC designs put up to 7X their I s/b ratings on them when the second tier supply kicks in. You don't see them dropping like flies, and you see a lot of copies. Obviously, 50V at 1A is bull****.
FWIW - some of the Jap devices really sandbag the specs on their devices. Back in the day, the original Toshiba 2SD424 would routinely pass the 2.5A/100V 2N6259 SOA torture test. There were others as well - probably the 2SD555. The 424 was rated 70V/1A for I s/b. The real capability of the C5200 is probably pretty high as well. The QSC designs put up to 7X their I s/b ratings on them when the second tier supply kicks in. You don't see them dropping like flies, and you see a lot of copies. Obviously, 50V at 1A is bull****.
thanks ----
as did not have a 2N3773 -
which is quite impressive ==140 volt /30 amps--- npn
I simply clipped in the nearest size I had --- TIP 41 C ---100 volt/6amp npn
--WORKS well ---no problem( simple dimmer 12volt circuit)
appreciate your input
regards
as did not have a 2N3773 -
which is quite impressive ==140 volt /30 amps--- npn
I simply clipped in the nearest size I had --- TIP 41 C ---100 volt/6amp npn
--WORKS well ---no problem( simple dimmer 12volt circuit)
appreciate your input
regards
A simple 12V dimmer circuit???? Let me guess - driven by a 555 chip? If so, pretty much ANY NPN transistor that can handle the lamp current would work. Why was a 3773 specified? Because the designer had one laying around and it would handle almost any imaginable load.
quite true --- that 2n3773 is powerful
---would take 6-8 weeks to order from USA --
so necessity = mother of find the closest power transistor
works very well --( with heat sink ) any auto 21 watt bulb x2 --
----
-- it is very cleverly simple --no 555 chip- IC or multiple components!-- ONLY one pot -one TIP 41-----
----- that's it ! assemble in minutes--( 2.2 k OHM var pot)--superb result--
---would take 6-8 weeks to order from USA --
so necessity = mother of find the closest power transistor
works very well --( with heat sink ) any auto 21 watt bulb x2 --
----
-- it is very cleverly simple --no 555 chip- IC or multiple components!-- ONLY one pot -one TIP 41-----
----- that's it ! assemble in minutes--( 2.2 k OHM var pot)--superb result--
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