WANTED: Hitachi's J49,J50,K134,K135
Mark Zenier
Henry Leschner <scient...@yahoo.com> wrote:
>Hi,
>can anybody tell me where I can find Hitach's compnents (JEDEC TO 3)
>with following inscriptions on it...:
>
> J49 Japan 7A1
> J50 Japan 7D3
>K134 Japan 7B1
>K135 Japan 8M1
There's a 2S on the front of the number that they don't bother putting
on the front. So these are 2SJ49 2SJ50 2SK134 2SK135 .
Here's some stuff I saved on them. Siemens has spun of the semi divison
as Infineon, or something like that.
>Xref: zenier sci.electronics.components:25146
>From: "Ian J. Smith" <i...@lucent.com>
>Newsgroups: sci.electronics.components
>Subject: Re: Any replacement for 2SJ49, 2SK134 ?
>Date: Mon, 07 Jul 1997 09:29:34 +0100
>X-Mailer: Mozilla 3.0 (X11; I; SunOS 5.5.1 sun4m)
>From - Fri Mar 7 13:38:16 1997
>From: ha...@hrz.th-darmstadt.de (Norbert Hahn)
>Newsgroups: rec.audio.tech
>Subject: Re: Looking for MOSFET transistors
>Date: Wed, 05 Mar 1997 20:15:51 GMT
>wgri...@neo.lrun.com wrote:
>>This might not be the correct news group to ask and if it isn't maybe
>>someone could point me in the right direction.
>>I'm looking for a source for the Hitachi brand or equivalent of:
>>2SK 135 2SJ 50
>>These were widely used in pro audio mosfet power amps and have been
>>discontinued from production. I have tried Hitachi and their
>>authorized vendors.
>This question comes up once in a while.
>Good news!
>Hitachi has stopped to manufacture these MOSFETs, however they continuee
>to produce the wafers. These are bought by Siemens in Germany and putt
>into a TO-3 package. Due to a different package they are called BUZ 900
>(old 2SK135) and BUZ 905 (old 2SJ50)..
>Because the TO-3 package is expensive you have to pay more. Due to
>better cooling of this package the maximum power that can be dissipated
>is higher, max voltage and current is not changed, however.
>Later,
>Norbert Hahnn
>University at Darmstadtt
>Germanyy
>Article 50705 of sci.electronics.design:
>From: Kendall Castor-Perry <ken...@rather.not>
>Newsgroups: sci.electronics.design
>Subject: Re: Current Source
>Date: Sat, 9 Aug 1997 10:56:32 +0100
>In article <5sg2nv$5...@fridge-nf0.shore.net>, Winfield Hill
><hi...@rowland.org> writes
>[snip discussion about threshold tempco in FETs]
>>
>>I'm interested in learning more about those special FETs. Could you
>>provide any part numbers? I realize they may be extinct now.
>>
>They were introduced by Hitachi in the mid-70's and became very popular
>for audio amplifier design. I don't know why, but Hitachi seemed to
>lose interest in marketing them in recent years.
>However, several companies do replacements for these so-called 'lateral
>MOSFETs', in some cases by buying die from Hitachi and assembling
>themselves. The only company I have info on is Exicon (believe Semelab
>to be another). Their best listed TO3 and TO264 parts are
>16A/200V/250W.
>The UK distributor who reps Exicon and is possibly part of the same
>company also do a nice line in higher powered assemblies in which the
>chips are bonded to internal heat spreaders in a big package with
>isolated mounting base and a low thermal resistance. They are pricy but
>look useful if you need such a thing.
>The transfer characteristic graphs clearly show useful negative tempco
>over the whole operating range. I don't think they have a web site but
>I'm happy to fax the data out, or you can fax Exicon on 44 1702 543700.
>Kendall Castor-Perry
Mark Zenier mze...@eskimo.com mze...@netcom.com Washington State resident
hay@yahoo.com Wes.
number
e.g.
2SJ49
2SJ50
2SK134
2SK135
Wes.
Remove space between wes & hay to reply via e-mail
My Home Page www.geocities.com/Area51/Station/3975/
Henry Leschner <scient...@yahoo.com> wrote in message
news:38AD6623...@yahoo.com...
> Hi,
> can anybody tell me where I can find Hitach's compnents (JEDEC TO 3)
> with following inscriptions on it...:
>
> J49 Japan 7A1
> J50 Japan 7D3
> K134 Japan 7B1
> K135 Japan 8M1
>
> Thanks!
>
Sammy Gordon
amp projects. You can buy these from MCM usually but they are popular
and often sold out.
On Fri, 18 Feb 2000 19:25:05 GMT, mze...@netcom.com (Mark Zenier)
wrote:
>In article <38AD6623...@yahoo.com>,
>Henry Leschner <scient...@yahoo.com> wrote:
>>Hi,
>>can anybody tell me where I can find Hitach's compnents (JEDEC TO 3)
>>with following inscriptions on it...:
>>
>> J49 Japan 7A1
>> J50 Japan 7D3
>>K134 Japan 7B1
>>K135 Japan 8M1
>