Power transistors

[Josip_Del]

Are these transistors any good? For example SymAsym, etc…
http://www.semelab-tt.com/pdf/bipolar/MG6331%20MG6331-R.pdf
http://www.semelab-tt.com/pdf/bipolar/MG9411%20MG9411-R.pdf

 

[AndrewT]

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.

 

[CBS240]

Pretty hefty BJT's. Competitive. A nice beefy driver stage might be in order to maximize potential for these.

 

[tommy1000]

Does anyone have a SPICE model for the MG6331 transistor?
Thanks

 

[djk]

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

 

[mt490]

The specs for the semelab and magnatec brand transistors seem to be very different despite the similarities of the part numbers and parent company.

 

[djk]

This is the highest SOA device in plastic I have ever seen:

http://www.onsemi.com/pub_link/Collateral/MJL21195-D.PDF

 

[AndrewT]

SOA is only 1A at 100V.

http://www.farnell.com/datasheets/866305.pdf

and the datasheet shows the knee in the SOA plot @ ~2.5A and 60Vce. giving 150W dissipation. Clearly not a 300W device.

 

[Pingrs]

and the datasheet shows the knee in the SOA plot @ ~2.5A and 60Vce. giving 150W dissipation. Clearly not a 300W device.

The OP’s 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.

 

[tommy1000]

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!

 

[homemodder]

Also to be kept in mind that these transistors come in 2 diffirent versions with the r rated part having higher vce ratings. What is not clear is whether those curves shown in the farnell datasheet are for the normal or r rated version. From the original semelab datasheet it is quite clear that the r rated version can do around 2.5A at 100vce which would make it mighty indeed but Im not sure whether it is possible from a TO3P package.

 

[AndrewT]

Looking at the post1 link to datasheet (9096).
I see two SOA diagrams. One for 6331 - R and the other for 6331. Both are specified as 300W devices with 0.42C/W.
The 100ms and DC curves are almost identical. The 10ms curve is slightly more generous towards the R version.
datasheet 8684 shows SOA

Ta 25degC, single pulse, no heatsink, natural cooling

That would be an acceptable way to specify for short single pulses. I doubt anyone would class DC and 100ms as short. Even 10ms could be argued as short or medium or a long pulse.
But I ask, why would TT show such a plot?

 

[djk]

I wonder if this 400W rated plastic part is a double die?

On Semiconductor offers a double die version of the MJ21194.

 

[dawsoo]

Mens, MAG6331 and MG6331 is different trannies....

Standard SOA version called "MAG6331" = rebrand Sanken 2SC6145?
High SOA version caled "MG6331" = dual chip or thin waffer chip?