Source for transistor outline dimensions needed

Hi Dave:

I tried everything I could think of, I'm not sure who sets the standards, and I am an IEEE member and then some. Yes, I use "asdhjkfashjdf" frequently.

Bob H

That would be JEDEC Publication 95. The sections are available for download after registration.

On 3/28/2009 5:39 PM hr(bob) snipped-for-privacy@att.net spake thus:

Dayum!

I tried every trick I could think of:

"standard semiconductor packages" * "standard transistor outlines" "transistor outlines" to-3 to-220 ieee iso

and a bunch more. Nada. Zip. Zero.

Who the hell is the keeper of those standards? I woulda thought it would be an ISO standard, or perhaps IEEE.

• By the way, you do know, don't you, that you can tightly restrict a Google search by putting the search phrase in quotes, right?

Googling for "jedec transistor dimensions TO-5" gave me e.g. this

They give a drawing with dimensions of TO-5. I guess that most, if not all, of case types can be found out that way. Any drawbacks?

Regards, H.

Don't the device manufacturers give that information ?

Yes, get a data sheet for one. The major semi manufacturers all publish detailed dimensions.

Graham

JEDEC.

What device are you using ? Try using some common sense.

Graham

They do. Usually on the data sheet of the device in question.

Graham

I have a number of known good, but unknown types of transistors, scrapped from working electronics that I did not want to keep or pass on to Goodwill. I googled on the codes on the transistors, but got too many replies. I thought if I could figure out which TO-XXX the cases were, I would narrow my search somewhat. I don't know the case sizes by just looking at them as I normally do not worry about the TO- XXX case when replacing known transistors. I will try the JEDEC site.

Bob Hofmann

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I went there, 18000 pages. I just want outlines for commonly used transistors in tv sets.

Bob Hofmann

I am located far from the problem, but from what I have read in the last few years, Goodwill and similar organizations have become the dumping ground for unusable, unrepairable, electronic trash which costs them money to recycle.

Many of them have stopped accepting anything electronic that can not be sold for enough money to cover the cost of legally getting rid of the parts that come with it that are of no value.

Quite simply, unless you are willing to volunteer the time to sort it for them and dispose of the nonsaleable stuff, the only sane policy is to refuse any donations of electronics.

Geoff.

There are only a few relatively popular ones. Some Japanese or European devices may have non-JEDEC specified cases. And some manufacturers, notably Motorola at one time had 'in-house' case designs.

Graham

Please consider alternatives to Goodwill for electronics donations; its good that you are diverting materials from the recyclers, but Goodwill has become unresponsive and uninterested in serving the customer that seeks surplus electronics and is denying most electronics donations in many regions and those areas where it is still handled, the sale prices have often become excessive for materials that are often unserviceable.

Our local daily paper has a free-to-run swap and donation section and is a popular route for electronics donations; craigslist is another alternative and many areas have local citizen web presence free classified adverts.

I encourage everyone with interest in maintaining a vibrant electronics reuse ethic to write to your area Goodwill management offices to complain and request a sane policy towards electronics donations.

Regards,

Michael

If you follow the links, it's easy to drill down to just the one-page pdf for a given type; downloading the entire volume isn't required. Nonetheless, the answer to "who sets the standards" is JEDEC.

On 3/30/2009 8:27 AM Geoffrey S. Mendelson spake thus:

There are places that do exactly that.

F'rinstance, my favorite recycled-goods vendor, Urban Ore in Berkeley, has tons of electronic equipment, all sold "as-is" with no guarantee of working or not. Much of it does work; a lot of stuff is "vintage" (like old tube-operated equipment), so you takes your chances with it. In any case, they move a lot of stuff through their store.

Obviously they need to get rid of a lot of electronic crap that doesn't sell. Turns out that at least here (Alameda County), there are funded programs which handle consumer electronics waste. There's a place in Berkeley where I can take any electronic stuff--computer monitors, PCs, TVs, etc.--for disposal, for free, no questions asked.

Too bad this isn't the case everywhere.

Indeed, and I have _volunteered_ to do sorting, create lists of important material types, suggested methods of handling and distribution that are known to work and were used at Goodwill until a change of management, but in all cases have been ignored. Just about _everything_ electronic that has appeared as donations at our local Goodwill distribution center is wanted by experimenters and would be cheerfully taken in a 'free bin' as opposed to being a liability and expense to the organization for disposal.

Michael

On Sat, 28 Mar 2009 18:39:36 -0700 (PDT), "hr(bob) snipped-for-privacy@att.net" put finger to keyboard and composed:

- Franc Zabkar

On Tue, 31 Mar 2009 09:39:16 +1100, Franc Zabkar put finger to keyboard and composed:

You might like to get a copy of NTE's paper catalogue:

Otherwise you can use their web site. Every (?) datasheet appears to have dimensioned drawings:

For example, this transistor crosses to a TO-5 2N3866 part:

- Franc Zabkar

Franc - Thanx - Bob Hofmann