NJW3281 NJW1302 Sustained Beta from OnSemi

jackinnj · 17th December 2007, 04:09 PM

anyone have a chance to compare this -- seems that they were introduced in September but I didn't see a press release:

http://www.onsemi.com/pub/Collateral/NJW3281-D.PDF

Charles Hansen · 19th December 2007, 03:29 AM

I just received an e-mail from the product line manager at On Semi. Here's what he had to say about these parts:

"Our roadmap for the coming year is centered on the TO-3P package we are getting ready to introduce. This portfolio of devices uses the same die as our TO-264 parts. The lower cost TO-3P package will hopefully allow us to capture more of the cost competitive mid-range consumer business without sacrificing performance"

Leolabs · 20th December 2007, 12:43 AM

Quote:

"The lower cost TO-3P package will hopefully allow us to capture more of the cost competitive mid-range consumer business without sacrificing performance"

"Without sacrificing performance",how???

jackinnj · 20th December 2007, 01:08 AM

Quote:

Originally posted by Leolabs

"Without sacrificing performance",how???

Ain't no metal can (TO-3) -- just the plastic case -- seems that there are some other things at work, however. Steel ain't so cheap anymore.

I like TO-3, just becuz I rebuild amplifiers and the holes are already there.

CBS240 · 20th December 2007, 04:25 AM

Still comes up a bit short on SOA when compared to a typical mosfet device such as 'this' with the same case style. Over 30V with 10A DC from a plastic TO3P

taj · 20th December 2007, 04:50 AM

I'm a bit confused. What's the difference between the MJW (1302/3281) and NJW series? Just TO-247 vs. TO-3P? I don't see much difference between the two in terms of physical footprint. Is there an electrical difference?

Obviously the NJW is smaller than the MJL series TO-264 package, but doesn't the MJW series already provide the size advantage they're after?

Or is there more to it than I'm seeing?

..Todd

KSTR · 20th December 2007, 01:12 PM

OnSemi case codes:

NJW: TO3P
MJ: TO3
MJD: DPAK4
MJE: TO220/225
MJF: TO220-ISO
MJL: TO264
MJW: TO247
NJL: TO264-5 (with integrated t-comp diodes)

An effective difference in parameters other than Vcbo/Vceo seems to be in the 0302 vs 1302 (0281 vs 3281, resp) varietes, the "0"-version are smaller die (less Pd) and have less capacitance. For same number devices vs. case style (NJW, MJL, MJW) I see no significant differences (besides Vcbo/Vceo)

- Klaus

megajocke · 21st December 2007, 01:59 PM

Did anyone else notice that the Rth(j-c), power dissipation, thermal derating and maximum power dissipation don't add upp for many of the ONSemi plastic parts? (MJL21193, MJL3281...)

Rth(j-c) is stated as 0.7K/W and thermal derating as 1.43W/K. This would suggest a power rating of 180W. Or a typo as this is the same values as stated for the 250W metal cans.

Strange is that the mjw3281a datasheet says 0.625K/W (this works out to 200W) but the MJL3281 in the bigger TO264 says 0.7K/W. I have a hard time believing that the smaller package has better thermal properties...

I wonder too what is the advantage of TO3-P vs. TO247. Maybe it is cheaper in some way. Or maybe it's just the japanese transistor looks they are after :P

K-amps · 21st September 2008, 10:56 AM

250vce vs 230vce and also better hfe across most of the load spectra.... At a $1.48 a pop at Digkey... I ain't complaining. Sustained beta's for me!

AndrewT · 21st September 2008, 11:07 AM

I thought To3p was a generic title for all large plastic packages.
Now, it seems that ONsemi are saying that To3p is different from To247 and different from To264.

What exactly is To3p?

17th December 2007, 04:09 PM	#1
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	NJW3281 NJW1302 Sustained Beta from OnSemi anyone have a chance to compare this -- seems that they were introduced in September but I didn't see a press release: http://www.onsemi.com/pub/Collateral/NJW3281-D.PDF

20th December 2007, 04:25 AM	#5
CBS240 diyAudio Member Join Date: Aug 2005 Location: K-town	Still comes up a bit short on SOA when compared to a typical mosfet device such as 'this' with the same case style. Over 30V with 10A DC from a plastic TO3P __________________ All the trouble I've ever been in started out as fun......

21st September 2008, 10:56 AM	#9
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	MJW vs NJW 250vce vs 230vce and also better hfe across most of the load spectra.... At a $1.48 a pop at Digkey... I ain't complaining. Sustained beta's for me!

21st September 2008, 11:07 AM	#10
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I thought To3p was a generic title for all large plastic packages. Now, it seems that ONsemi are saying that To3p is different from To247 and different from To264. What exactly is To3p? __________________ regards Andrew T.

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19th December 2007, 03:29 AM	#2
Charles Hansen diyAudio Member Join Date: May 2003 Location: Colorado	I just received an e-mail from the product line manager at On Semi. Here's what he had to say about these parts: "Our roadmap for the coming year is centered on the TO-3P package we are getting ready to introduce. This portfolio of devices uses the same die as our TO-264 parts. The lower cost TO-3P package will hopefully allow us to capture more of the cost competitive mid-range consumer business without sacrificing performance"

20th December 2007, 04:50 AM	#6
taj diyAudio Member Join Date: Feb 2005	I'm a bit confused. What's the difference between the MJW (1302/3281) and NJW series? Just TO-247 vs. TO-3P? I don't see much difference between the two in terms of physical footprint. Is there an electrical difference? Obviously the NJW is smaller than the MJL series TO-264 package, but doesn't the MJW series already provide the size advantage they're after? Or is there more to it than I'm seeing? ..Todd

20th December 2007, 01:12 PM	#7
KSTR diyAudio Member Join Date: Jul 2007 Location: Central Berlin, Germany	OnSemi case codes: NJW: TO3P MJ: TO3 MJD: DPAK4 MJE: TO220/225 MJF: TO220-ISO MJL: TO264 MJW: TO247 NJL: TO264-5 (with integrated t-comp diodes) An effective difference in parameters other than Vcbo/Vceo seems to be in the 0302 vs 1302 (0281 vs 3281, resp) varietes, the "0"-version are smaller die (less Pd) and have less capacitance. For same number devices vs. case style (NJW, MJL, MJW) I see no significant differences (besides Vcbo/Vceo) - Klaus

21st December 2007, 01:59 PM	#8
megajocke diyAudio Member Join Date: Jan 2003 Location: Solna	Did anyone else notice that the Rth(j-c), power dissipation, thermal derating and maximum power dissipation don't add upp for many of the ONSemi plastic parts? (MJL21193, MJL3281...) Rth(j-c) is stated as 0.7K/W and thermal derating as 1.43W/K. This would suggest a power rating of 180W. Or a typo as this is the same values as stated for the 250W metal cans. Strange is that the mjw3281a datasheet says 0.625K/W (this works out to 200W) but the MJL3281 in the bigger TO264 says 0.7K/W. I have a hard time believing that the smaller package has better thermal properties... I wonder too what is the advantage of TO3-P vs. TO247. Maybe it is cheaper in some way. Or maybe it's just the japanese transistor looks they are after :P

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