2SJ162/2SK1058 - fake or real? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th February 2003, 11:42 PM   #1
diyAudio Member
 
seangoesbonk's Avatar
 
Join Date: Jan 2002
Location: Vancouver, BC, Canada
Question 2SJ162/2SK1058 - fake or real?

I just bought 2 pairs of Hitachi Lateral Mosfets 2SJ162 and 2SK1058... I hope.

As you can tell, I am suspicious. Why? Because of the price, markings, and shape of the 2SK1058.

1) The 2SK1058 is shaped differently than the diagram in the datasheet.

2) The markings are different from a picture I that I saw.(I have only seen the one pair, mind you)

3) The price was too good to be true!

Is it possible? Did I stumble upon the fabled free lunch?

Here's is the pic of the pair I've seen:
Attached Images
File Type: jpg latfet.jpg (28.3 KB, 2187 views)
__________________
My girlfriend's sub is bigger than mine...
  Reply With Quote
Old 12th February 2003, 11:51 PM   #2
diyAudio Member
 
seangoesbonk's Avatar
 
Join Date: Jan 2002
Location: Vancouver, BC, Canada
The front:
Attached Images
File Type: jpg hit_front_80.jpg (10.6 KB, 2057 views)
__________________
My girlfriend's sub is bigger than mine...
  Reply With Quote
Old 12th February 2003, 11:54 PM   #3
diyAudio Member
 
seangoesbonk's Avatar
 
Join Date: Jan 2002
Location: Vancouver, BC, Canada
The back:
Attached Images
File Type: jpg hit_back_80.jpg (11.7 KB, 1899 views)
__________________
My girlfriend's sub is bigger than mine...
  Reply With Quote
Old 12th February 2003, 11:59 PM   #4
diyAudio Member
 
Join Date: Aug 2001
Location: Melbourne/Australia
I hope they are not fakes, because they look just like
the batch I bought!

I bought mine from a local distributor that I was directed
to from Hitachi, so I would hope they are real.

Regards,
Tim
  Reply With Quote
Old 13th February 2003, 12:03 AM   #5
diyAudio Member
 
Join Date: Aug 2001
Location: Melbourne/Australia
Not sure about the 2SK1058. When I said mine looked the same
I was refering to the first pic (2SJ162 and 2SK1058 in same package).

Regards,
Tim
  Reply With Quote
Old 13th February 2003, 12:06 AM   #6
diyAudio Member
 
Join Date: Feb 2002
Location: Vancouver, BC, Canada
Send a message via ICQ to ThingyNess
The one on the right appears to be in a TO-264 case instead of the standard TO-3P case that most of the japanese semi manufacturers use.

I can't see hitachi switching case styles and keeping the same part number, as there are pretty significant differences in the lead spacing between TO-3P/TO-247 and TO-264 if I remember correctly, not to mention the different package outline that could "break" some designs using them.

There are "generic" chinese made clones of some japanese semis, such as the 2sa1302/2sc3281, but they don't have the Toshiba logo on them, and don't really "pretend" to be real devices. The TO-264 packaged device you have there DOES have a real Hitachi logo on it, so it's either a real device (seems unlikely, but you never know), or a fake.

Out of curiosity, did you buy those locally, Sean? I've been meaning to get some and was thinking about hitting pacificsemi up for a few.

One way to check of course would be to crack a complementary pair open and have a look at the dies -- if they're very similar, they hopefully will be real.

However, if they are real, you can be happy that you have at least one in the TO-264 package, as it's superior to the TO-3P in terms of thermal resistance and current handling (larger/thicker leads)

Edit: It's interesting to note that the lettering on the TO-264 packaged one actually looks like the known good ones, and the one in the correct TO-3P package style looks like it has odd lettering compared to the samples you posted above. Weird!

- Rick
  Reply With Quote
Old 13th February 2003, 02:42 AM   #7
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default here's a test you can do

it doesn't seem that the usual stockists have them in -- check www.findchips.com.

the Vgs(t) of the Hitachi devices is very low -- there's a test you can do yourself to compare it with a regular MOSFET -- take look at the charts in the PDF and you'll see.

Fabled saying at my graduate school alma mater <b>TANSTAFAL</b> -- "There ain't no such thing as a free lunch".
  Reply With Quote
Old 13th February 2003, 02:46 AM   #8
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Default PDF

Which PDF ?
Cheers.
__________________
AM
  Reply With Quote
Old 13th February 2003, 02:49 AM   #9
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default the PDF on Hitachi's website

there's a Vgs vs I(d) graph in the PDF

btw, wherabouts in India?, I am going there again in the winter.
  Reply With Quote
Old 13th February 2003, 06:35 AM   #10
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Default South India.

Hi Jackinnj,
I live in South India - in Chennai to be exact.
Have you been to this part of the country ? Want any 'tourism suggestions' ?

I get what you mean about the Vgs. Yes the Hitachi ones have very low Vgs - looks like a bjt base emitter voltage.
I bought some locally for about US$6.5( a pair). I have not tried them out yet. They look quite like the originals that I bought in Hong Kong a long time ago.

Cheers.
__________________
AM
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fake 2SK1058 or 2SJ162? ShinOBIWAN Solid State 18 13th November 2014 12:18 AM
2SJ162-E and 2SK1058-E 1965GTO Vendor's Bazaar 5 7th August 2012 06:05 PM
Anyone know where to get 2SJ162/2SK1058 fossil2k Solid State 8 17th March 2008 12:07 PM
2sk1058/2sj162 Fs sandyhooker Swap Meet 3 12th March 2008 04:50 PM
2sk1058 / 2SJ162 - 4 of each - aus only mikefromaus Swap Meet 0 24th January 2008 01:27 PM


New To Site? Need Help?

All times are GMT. The time now is 03:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2