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Old 6th January 2011, 08:55 AM   #1
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Default Power transistors

Are these transistors any good? For example SymAsym, etc
http://www.semelab-tt.com/pdf/bipola...20MG6331-R.pdf
http://www.semelab-tt.com/pdf/bipola...20MG9411-R.pdf
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Old 6th January 2011, 10:47 AM   #2
AndrewT is offline AndrewT  Scotland
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the spec reads as good.
SOA 3Adc @ 100Vce is indeed mighty.
I wouldn't class it as 60MHz fT more like 40 to 50MHz, comparable to other manufacturers.

Probably worth trying a complementary pair of samples and report to us and Semelab.
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Old 6th January 2011, 11:16 AM   #3
CBS240 is offline CBS240  United States
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Pretty hefty BJT's. Competitive. A nice beefy driver stage might be in order to maximize potential for these.
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Old 10th December 2011, 11:11 AM   #4
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Does anyone have a SPICE model for the MG6331 transistor?
Thanks
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Old 12th December 2011, 02:30 AM   #5
djk is offline djk
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SEMELAB|MG6331-R|TRANS,AUDIO,NPN,260V,18A,TO-3P | Newark.com

"SOA 3Adc @ 100Vce is indeed mighty."

SOA is only 1A at 100V.

http://www.farnell.com/datasheets/866305.pdf
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Last edited by djk; 12th December 2011 at 02:35 AM.
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Old 12th December 2011, 02:54 AM   #6
mt490 is offline mt490  Australia
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The specs for the semelab and magnatec brand transistors seem to be very different despite the similarities of the part numbers and parent company.
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Old 12th December 2011, 03:30 AM   #7
djk is offline djk
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This is the highest SOA device in plastic I have ever seen:

http://www.onsemi.com/pub_link/Colla...MJL21195-D.PDF
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Old 12th December 2011, 10:24 AM   #8
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by djk View Post
and the datasheet shows the knee in the SOA plot @ ~2.5A and 60Vce. giving 150W dissipation. Clearly not a 300W device.
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Old 12th December 2011, 12:31 PM   #9
Pingrs is offline Pingrs  United Kingdom
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Originally Posted by AndrewT View Post
and the datasheet shows the knee in the SOA plot @ ~2.5A and 60Vce. giving 150W dissipation. Clearly not a 300W device.
The OPs data sheet (doc 9096) reads ~2.3A at 140V. The Farnell one (doc 8684) is odd- nine divisions/decade on the log/log graph? So which do you trust?

Brian.
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Old 12th December 2011, 12:40 PM   #10
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These are the most powerfull I have found in plastic, MG6333 and MG6332:
http://www.farnell.com/datasheets/866313.pdf
http://www.farnell.com/datasheets/866312.pdf
But the Cob is 800 pF!
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