Diode help.

[Mark McGrath]

I`m looking for 1N4999 diodes.I can find plenty datasheets but no one with the bits apart from a guy on ebat.com.
I can look for substitutes but having difficulty finding out what the package is called.It`s a tin can about 3/8" dia x 3/8" high with two legs sticking out the base.
These are on an old Stewart Warner power supply board and I really need to keep the same layout.
Anybody got any suggestions?

[The Artful Bodger]

Google finds them easy enough, try this guy http://www.mikes-hobby-shop.com/servlet/the-2876/1N-4999--SHOTKY/Detail he even shows a picture of them.

[Fasttrack]

Looks like a TO-5 package... don't think I've seen a diode in a can like that before.

[Mark McGrath]

Google finds them easy enough, try this guy http://www.mikes-hobby-shop.com/servlet/the-2876/1N-4999--SHOTKY/Detail he even shows a picture of them.

I have spent all afternoon on google and only got datasheets.
Can you do me a link to compare the google page?
Thanks for that.

[macona]

Looks like a TO-5 package... don't think I've seen a diode in a can like that before.

I have seen them. A lot of times they get pushed into a heat sink. But usually not pc mount like that. Odd.

[J Tiers]

it's a car alternator press-fit package..... The side wire is added to allow PC mounting.

Mark:

Are you sure you need that one and no other?

it's a 3A 200V rectifier.... listed by Microsemi as silicon, although it is fairly low voltage drop.

I suspect others could be found to fit the same footprint reasonably well. There are a couple of packages for 3A diodes at least one of which is slim enough to probably work if "hairpinned".

A 1N5402 through 5407 part may work, for instance. 200A instead of 300A peak surge, but......

Lead diameters might be an issue, but perhaps not.

[Mark McGrath]

Jerry,I`m just replacing like for like.The package was causing me more of a problem than the electrics.
I found a comparable one in the same package which was a MR1033 and google couldn`t find a supplier of these either.
I`ve ordered 10 from the site that Bodger linked to.
I`m more interested now,in why Google did not show me that page.I looked at every single result Google would give me for all sorts of combinations but all I got was datasheets or sites promising datasheets.Couldn`t get an image of the package I needed either.
I suspect that Google is zoning results as it tends to show you more what it thinks you want to see than what you actually want to see.
It also ignores what you type in and substitutes it`s own assumptions sometimes.
Very frustrating.
I`m repairing and old Stewart Warner scanner on a profile cutting table.It`s a model LCT30 if anyone has any info on them it would be appreciated.
Thanks for all the suggestions and help guys.

[kf2qd]

Make sure the shaft that everything rotates on is not bent. Bent shafts is common and will drive you nuts. (unless you are there already)

I grew to really hate those things. Was easier to go CNC and do away with dirty templates and black bugs crawling around on the templates.

Have a good HB pencil, a sharpie used to work, but I don't know if they have changed the ink...

[Mark McGrath]

Just a word of praise to Mike Smith from Mikes Hobby Shop whom the Artful Bodger pointed me to.
Not only shipped the diodes here with no fuss but also sourced and supplied four long obsolete GE relays at minimal cost for me as well.
A name well worth remembering.
http://www.mikes-hobby-shop.com/servlet/the-2876/1N-4999--SHOTKY/Detail