Tantalum capacitor scrap - Page 14

Thanks so much for all the info Burt!

There are two sizes of the larger ones with 3 leads. Super hard to read all these little guys!
Looks like the two larger:
476 6k
475 10k

smaller 2 leads types:
k5u 105m
k5k 104
k1k 103

Originally Posted by bigburtchino

Red - Hard to say with 100% accuracy, but with just your markings I would say all are made by KEMET. The 476 6K and 475 10K are KEMET T396 Tantalum capacitors.

Based on the marking info. only the K8U 105M, K5K 104, and K1K 103 are also made by KEMET, but are not Tantalum capacitors. They are ceramic radial capacitors similar to this one.

Big is absolutely right these are NOT Tantalum Capacitors.

That makes sense, because the small ones didn't seem to be the right shape. The larger ones looked similar to other tantalum epoxy I had but that third lead and odd shape threw me. Thanks Burt

Originally Posted by ScrappinRed

That makes sense, because the small ones didn't seem to be the right shape. The larger ones looked similar to other tantalum epoxy I had but that third lead and odd shape threw me. Thanks Burt

Yes the larger ones look like a thicker egg drop shape capacitor but indeed the inside of the capacitor is the same as regular Epoxy Capacitors.

ScrappinRed: Not to hijack thread: But if you are gutting that board.. be sure to pull those socketed PROMS and/or possibly E-Proms (The ones with stickers may have a window underneath)

Ok. Back to Tantalum Talk!

Originally Posted by bigburtchino

Red - I always use a magnet as one method of identifying tantalum capacitors. Almost all tantalum capacitors seem to have some magnetic properties, Tantalum is not a magnetic metal (does not generate a magnetic field), it is a paramagnetic metal, it will react to magnetic fields. Most tantalum capacitors (95%+) that I have encountered have a strong magnetic pull. I suspect most of the "magnetic pull" has to with the manufacturing process and the other materials used to make tantalum capacitors. Many TC's have a pure nickel wire welded to a tantalum wire on the anode portion of the capacitor. The cathode connection can also be a nickel, or kovar wire both of these type of leads and the glass‑to‑metal seal are highly magnetic. Quoting a NASA document that specifies the material requirements for building spacecrafts, "Non‑magnetic tantalum capacitors are difficult to find". So I use a scrappers best tool, a magnet to help quickly ID tantalum capacitors. They do make non-magnetic TC's, so I'm not saying all TC's are magnetic, just most of them are!

Red - Can you check the three lead TC's with a magnet, confirming as I'm sure they will also be magnetic. Now for "$hits & giggles" check the ceramic capacitors on your circuit board, are they magnetic?

Absolutely 100% True.

bigburtchino, that was very helpful for me. I was going to waste my time and others, photoing some caps asking if the were good or not. Now I know for certain they are not. Mike

Originally Posted by Smb

Good day, using a scrapper sound the best way. I am mew to this i tried scrapping a pc board and alot of very tiny brownish capacitors stuck to magnet. Marking next to these are c then number also cb, L, yellow and black square one i know from above pictures but there is also a square black one positive marking but that has a d and number marking on board. If Anyone can help thank you. I have 1437 grams of the square black and yellow ones and 356 grams ( tear drop?) ones.

Can you please provide us a picture of what type you are speaking about. This would be the easiest way to check if it is Tantalum or Not.

Originally Posted by kane333

Here's a Video showing how to help identify SMD (Surface Mount Device) and other Tantalum Capacitors. It's a bit lengthy video but informative. Hope this helps.

This is a good video -- And is correct.

Originally Posted by Flinthills

I hope that when he's not doing a video he uses a pair of needle nose pliers instead of a screwdriver to remove the SMD's. For me, pliers are about 5-10x faster. Plus you don't waste anytime chasing down SMD's that take flight with the help of a screwdriver. Additionally, you don't have to pick them up to deposit in your SMD bin. Removal and pick up is one step.

This is a very informative video - But, he mentions that SMD's are the main capacitors in new electronics.

This is incorrect - SMD's are the most plain and common Tantalum Capacitors - But, Tantalum Hermetics, Wets & Silvers are on High Grade Boards - Mainly Military for every one Tantalum Hermetic Capacitor you find it is the same as finding
15 Tantalum SMD Capacitors.

should have waited to post. have a question on these. are they wet tant? or just electrolytic. they came out of the housings shown, looked through all pics couldn't find similar:

Originally Posted by jiffy117

should have waited to post. have a question on these. are they wet tant? or just electrolytic. they came out of the housings shown, looked through all pics couldn't find similar:

I do not believe these are Wet Tantalum Capacitors - However it is very weird because they most definitely look like wet capacitors other then the two wires sticking out of the top.

The Black capacitors are SMD;s the yellow ones are not

Originally Posted by jiffy117

The silver capacitors came out of the black and yellow housings shown. I've searched quite a bit, can't even find who makes them. Thanks for the answer, I only have what is shown, so wasn't about money, more curious. I have designed many circuit boards, but never sourced or learned about these guys.

Can you please send us pictures of the type of capacitors you are describing here.