Anything better than 2sk1058,2sj162 pair?

birdyman · 15th January 2010, 03:56 PM

It is hard to search for good Audio Mosfets-may be because of my lack of experience or knowledge

I am looking for better mosfet sub on rail voltage of +- 80v amp.
Thank you in advance

Rikard Nilsson · 15th January 2010, 04:40 PM

Toshiba 2SJ201 and 2SK1530 are a very good choice in my opinion.

jacco vermeulen · 15th January 2010, 04:57 PM

J162/K1058 can't properly handle 80Vdc rails.

If you prefer to stick to Lateral MOSFETs you're better off with Exicon ECX10N20/ECX10P20, TO247 package equivalents of the 200V Hitachi J56/K176.
Can be ordered direct from Profusion in the UK.

birdyman · 15th January 2010, 05:15 PM

They can't handle 80V rail. now I know because I smoked few. Thanks for quick reply

Lumba Ogir · 15th January 2010, 06:11 PM

birdyman,
2SK2220/2SJ351. You won`t find any better.

wahab · 15th January 2010, 08:20 PM

Quote:

Originally Posted by Lumba Ogir

birdyman,
2SK2220/2SJ351. You won`t find any better.

these are almost the same devices as the 2SJ162/2SK1058,
the only difference is current drain increased from 7 to 8 A ,
and a slight increase of 20 V VDS for the 2220/351 parts,
and 40V for the 2221/352...

kf_tam · 15th January 2010, 09:44 PM

Quote:

Originally Posted by jacco vermeulen

J162/K1058 can't properly handle 80Vdc rails.

If you prefer to stick to Lateral MOSFETs you're better off with Exicon ECX10N20/ECX10P20, TO247 package equivalents of the 200V Hitachi J56/K176.
Can be ordered direct from Profusion in the UK.

Dear Jacco,

Would you kindly tell me why the K1058/J162 can't handle 80V? The datasheet says max 160V. I have 8 pairs of these and therefore it would be good to know the safe max. voltage. Thanks!

Lumba Ogir · 15th January 2010, 10:04 PM

wahab,
the 2SK2220/2SJ351 is a more closely matched pair due to improvement of the P-channel device. Look at the value of Crss.

wahab · 16th January 2010, 12:22 AM

well, all the other parasistic parameters , Ciss and Coss are no better, and even worse
on the 2220/351....all in all, i would stick with the 162/1058 if ever they are cheaper..
myself i use the now obsolete TO3 variant of these devices, and i can tell you,
they are very rugged and very good sounding..

jacco vermeulen · 16th January 2010, 09:48 AM

Quote:

Originally Posted by kf_tam

why

Basic power supply reason, the rail voltages will fluctuate due to variations in the mains plus transformer regulation.
Hong Kong mains power is 220Vac with +/-10% bandwidth, so mains voltage can range between 198Vac and 242Vac.
Common regulation numbers for toroidal transformers are 4.5% for a 500VA, 4% for a 750VA, 3.5% for a 1000VA.

On fast transients, output voltage can be close to rail voltage with the opposite output device opened, Vds close to 2*Vrail.
J162/K1058 can handle a max Vds of 160Vdc, so rail voltage level should not go above 80V.
Using a 500VA in Hong Kong boils down to nominal rail voltages of +/-70Vdc.
(70 + 14.5% makes 80)

15th January 2010, 03:56 PM	#1
birdyman diyAudio Member Join Date: Jan 2010	Anything better than 2sk1058,2sj162 pair? It is hard to search for good Audio Mosfets-may be because of my lack of experience or knowledge I am looking for better mosfet sub on rail voltage of +- 80v amp. Thank you in advance

15th January 2010, 04:57 PM	#3
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	J162/K1058 can't properly handle 80Vdc rails. If you prefer to stick to Lateral MOSFETs you're better off with Exicon ECX10N20/ECX10P20, TO247 package equivalents of the 200V Hitachi J56/K176. Can be ordered direct from Profusion in the UK. __________________ Looks like Sponge Bob has killed another thread.

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15th January 2010, 04:40 PM	#2
Rikard Nilsson diyAudio Member Join Date: Aug 2008	Toshiba 2SJ201 and 2SK1530 are a very good choice in my opinion.

15th January 2010, 05:15 PM	#4
birdyman diyAudio Member Join Date: Jan 2010	They can't handle 80V rail. now I know because I smoked few. Thanks for quick reply

15th January 2010, 06:11 PM	#5
Lumba Ogir Banned Join Date: Apr 2005 Location: Stockholm	birdyman, 2SK2220/2SJ351. You won`t find any better.

15th January 2010, 10:04 PM	#8
Lumba Ogir Banned Join Date: Apr 2005 Location: Stockholm	wahab, the 2SK2220/2SJ351 is a more closely matched pair due to improvement of the P-channel device. Look at the value of Crss.

16th January 2010, 12:22 AM	#9
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	well, all the other parasistic parameters , Ciss and Coss are no better, and even worse on the 2220/351....all in all, i would stick with the 162/1058 if ever they are cheaper.. myself i use the now obsolete TO3 variant of these devices, and i can tell you, they are very rugged and very good sounding..

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