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Old 4th June 2014, 03:56 PM   #1
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Join Date: Aug 2012
Default Genuine Toshiba transistors in India

genuine Toshiba transistors for sale available in India.
After using 2sc5200 1943 pairs i have decided to move more rugged transistors which can deliver almost double the current of what 2sc5200 1943 can deliver
Finally I have bought 100units of 2SC5949 100 units 2SA2121 from toshiba distributor.

I do have

Nichicon Muse KZ 100uf/100V

Elna Silmic 2 100uf/35V

( 100% genuine ) since got from distributor

Im willing to sell my excess stock if anybody interested from India please let me know.
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Old 4th June 2014, 04:01 PM   #2
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Location: The Jurassic Coast, England. GB
The 5200 is far superior to the 5949. Higher current and voltage rating.
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Old 4th June 2014, 04:07 PM   #3
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how come? I didnt see that in SOA... even on the toshiba website it states that 5949 and 2121 are meant for 140W amplifier where as 5200 is for 100W
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Old 4th June 2014, 04:15 PM   #4
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toshiba 2SC5949 2SA2121 better than 5200 1943?
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Old 4th June 2014, 11:58 PM   #5
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Originally Posted by JonSnell Electronic View Post
The 5200 is far superior to the 5949. Higher current and voltage rating.
ohh here you go...
the voltage rating from 230 to 200v is fine becoz we dont use them at that extreme level but the current rating is important here as it can deliver higher current than the 5200.
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Old 8th June 2014, 12:20 AM   #6
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It's all very impressive looking at maximum ratings - the ones you never want to approach in use. The more important facts are in the combined V/I ratings. That's what you see on the SOA graph describing the dynamic behaviour limitations and not just limits in isolation shown by maximum, no-current figures such as Vceo.

Look at the maximum DC current allowable within the graph's boundaries at a realistic Vce for your design and you'll see how wimpy the 5200/1493 pair really are at say, 60V. 2nd breakdown line then limits current to 1.8A for 5200 but 5949 holds up better at 2.5A. Obviously, pulsed current ratings are higher but they will be proportional given the physical assembly details - die size etc. If you then de-rate for likely operating case temperature, you'll see that regardless of Vceo and Icmax, the 5200 can't even make 1A at 60Vce. Read the notes on Toshiba's datasheets but note their original 2SC5200/A1493 are now obsolete. The N suffix types are smaller package, like 2SC5198/A1941 etc.

In the real world, the choice is down to cost. One is dirt cheap and everywhere with plenty of variations and counterfeits - the other is unusual and more expensive. So maybe you just opt to use more but cheaper transistors like everyone else?

As you have already started a thread with this same general topic, why not use and keep the replies together in the one thread or you just get the same stuff back time and again from different people who don't have the time to follow you around checking what you have or haven't already been advised .
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