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Old 19th August 2015, 07:59 PM   #1
paul79 is offline paul79  United States
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Default Help with Mosfet Subs....

Hello everyone!

I am needing one of each:

2SK400/2SJ114 (TO3P)

Would 2SK1529/2SJ200 be ok to use as subs? These are drivers in an Accuphase amplifier...

Better would be a modern substitute, but I fear that one does not exist within these parameters. I can get the 2SK1529/2SJ200

Thanks for any help.
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Old 20th August 2015, 02:58 AM   #2
paul79 is offline paul79  United States
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Old 20th August 2015, 08:56 AM   #3
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I find UTsource reliable and trusted. 2SJ114 Encapsulation to 3P Transistor MOSFET to 247 | eBay
1pcs 2SK400 Encapsulation to 3P Transistor MOSFET N Channel 200V VBRDSS | eBay
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Old 20th August 2015, 02:46 PM   #4
paul79 is offline paul79  United States
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Allot of feedback claiming they sell fake parts... Not saying all their parts are, but I can't risk this with a $5K amp with $250 worth of nos outputs. Both parts being black (the original J114 is green color) is another red flag.

Thanks for the suggestion though.

Last edited by paul79; 20th August 2015 at 02:49 PM.
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Old 20th August 2015, 03:03 PM   #5
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It's only the early Hitachi p-channel devices (all 2SJnnn) that had a green case. For many years the later production used black for both n-channel and p-channel.
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Old 20th August 2015, 03:50 PM   #6
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I tend to agree with the OP and share his fears because my last sets of Mosfets and bipolars from UT were not original parts as pictured on their website and Ebay. What was delivered were either unbranded or Chinese branded copies which could have been just substitute types marked accordingly- not strictly fakes but effectively useless as replacements for repair work where reputations actually matter.

The feature of these Hitachi parts is, like the IRFP240/9240, they have a high Rds which as Bob Cordell has written, is more suited to audio than the super-low Rds switching types common now and and often supplied as fakes from other Ebay sources when obsolete audio parts are ordered.

If I had doubts, I'd substitute those IR parts as a complete set in preference to risk taking with copies of the original type of unknown quality.
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Old 21st August 2015, 05:49 AM   #7
bluevas is offline bluevas  Indonesia
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How about 2SK413 2SJ118 for substitute? I have two pairs.
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Old 21st August 2015, 09:30 AM   #8
AndrewT is offline AndrewT  Scotland
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Quote:
2SK400/2SJ114
what type of mosFETs?
Lateral or vertical?
Quote:
2SK1529/2SJ200
are vertical.
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Old 22nd August 2015, 03:16 AM   #9
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They are vertical Mosfets. Hitachi's TO3P latfets are in higher number series.
2SK400 PDF Datasheet - Hitachi, Ltd. - Datasheets360.com
MOSFETs for amplifier | Renesas Electronics
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Old 24th August 2015, 02:42 PM   #10
paul79 is offline paul79  United States
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Thanks guys.... To confirm, the 2SK413/2SJ118, IRFP240/9240, and the 2SK1529/2SJ200 should all work to sub for the 2SK400/2SJ114?

Thanks again for the help
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