What caps is this?

Siemens. At least from the trademark. Possibly 1 UF at 40 VDC

Jeff

--
?Egotism is the anesthetic that dulls the pain of stupidity.?
Frank Leahy, Head coach, Notre Dame 1941-1954

http://www.stay-connect.com

Siemens logo.

John

Type?

Nice photo. Dimensions would have been helpful.

My guess(tm) is Tantalum. It's not ceramic as it appears to be polarized. It's not metalized film, for the same reason. It's too small for electrolytic. That leaves tantalum.

Siemens sold their cazapitor division to EPCOS:

I couldn't find anything on the site resembling that capacitor.

I recall using similarly packaged caps back in the 1970's from Kemet. I couldn't find any Epoxy B packaged tantalums on the Kemet site, but there are similar packages with what looks like the right lead spacing. See:

and look for "Tantalum Molded Radial" on Page 7. If you have a Digikey or Mouser printed catalog, you might want to skim through the pages and see if there's something similar. I'm too lazy to do it right now.

--
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

"Paul Conners"

** Looks very much like some German made " long life " electros I see in audio equipment made by Quad in the UK in the late 1970s and 1980s. Normal electros, airtight sealed in a plastic housing.

Funny thing is, they nearly all failed ( high ESR or open) after 10 to 15 years.

.... Phil

Thank you Canon! (A620, handheld.)

7 mm H, 4 mm W & D.

Being molded plastic, does this automatically rule out electrolytic?

5751600535A31/$file/F3296_ProductSelection.pdf#page=3>

Resemblance? Color?

The originals are black and beveled at the front corners. None of these are. Other than physical, not much to go on...

Thanks.

[Groan...] Just when I was convincing myself that they were poly-somethings.

Yeah, I suspect the electros on this PCB causing all sorts of problems. Just hoping that all the "traditional" form-factor caps I'd replaced were all the bad ones. Now this non-standard fare...

Thanks, Phil.

PC

7,3 x 4,2 x 4,7 mm The Siemens type was "B 45 181"

Yes. There was an odd old rule "3 Ohm / Volt" for minimal impendance to drive normal tantals. These claimed to be "schaltfest", somewhat better quality.

MfG JRD

If you think one/some are faulty, make a note of value/voltage and break one open - the difference between an alu' foil electro and a tant' should be easy to see.

Possibly, because I've never seen any electrolytics in Epoxy-B molded packages. However, Phil Allison indicates that they might be electolytics, so I can't be 100.0% certain. Worse, the original photo shows a silk screen component outline that's somewhat larger than the Siemens capacitors. I'm fairly sure that anything 7x4x4mm would be tantalum, but the larger outline size could easily have been either tantalum or electrolytic.

A Kemet substitution might be problematic as they don't have a packages that's an exact match. Sorry for the diversion.

If you don't want to crack one open to see what's inside, and finding an exact substitute seems to be a problem, then replacement with a simple dip tantalum 1uf 50v should both fit and work. I don't have any problems with substituting tantalum for aluminum electrolytic because of the lower ESR of tantalum. However, going the other way will probably not work.

--
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

They are tantalum:

The German electronics news group was the resource that broke the case...

Thanks to everyone who contributed.