Found Silver & Tantalum - Page 5

Are they paying you for recovered capacitors to reuse them, or are they paying for the scrap metal?

Ahhhh, Tantalum. It has been a complete mystery trying to lock down a quick reference, or ideal identification system for me. It seems tantalum is almost E-Waste's best kept secret. I had never really heard of it at all previous to my business venture in CED's. And once I did, I was confused from the start,lol!it was a real conformt knowing others were having the same luck. I have never had so many people point at something and say"that's tantalum",and then have another group point at the very same thing, and say no,lol! It is almost like it was intended to be that ways as an Industrial prank. The thing I notice the most is, the inconsistent ways it is marked on component, and the way they make capacitors exactly the same, (aluminum cans etc.), but some are and some not. I just take the bigger sized,or obvious positive charged ones, and throw them all in a tote. The trick is, realizing the possibilities, and not giving away these items that are in your possesion, and not ignoring the full value of recycling these precious items. Tantalum, or Luminum,or whatever. Carpe diem my friends

Originally Posted by ScrappinRed

You've also got gold on those three transistors...

That's true. I have a quart fruit jar full of them. Accumulating them was a waste of time. At my age, it's doubtful I'll be able to hang on to enough stuff to make a refinery trip worth while. Even if I did, I don't think they would be high grade enough to make that trip. Not to mention that I had to leave something "shiny" on the board to be able to sell it.

I have come across what is to me, a new twist in the quest for Tantalum capacitors. These TA have a different metal "welded" to both leads. Both ends are recessed. These are M39006 series capacitors. Specifically, M39006/01-3054. Per photo, these puppies are almost 3" long! With a weight of 15.6 grams each, certainly worth my time to pluck them off the host board. I've had many similar boards that had 3" long capacitors around the perimeter but these were the first that were TA. To the right of center are two more TA. The long (1") skinny one also has recessed ends with welded leads on both ends. It's a M39003 series.

I'M not 100% on this but your M39006 capacitors, should be "wet" tantalum capacitors. Similar to the Vishay-Sprague 285D Wet Tantalum Capacitors, Sintered Anode TANTALEX®, is a wet tantalum capacitor, hermetically sealed with extended temperature rating. Axial through-hole tubular metal case, with Tantalex components.

Military specification MIL-STD-39006 was generated to define qualification testing (based on MIL-STD-202 tests) for the various families of wet tantalum that were developed.

Are there any other marking's? Is the case diameter about 0.50 in. (1/2")? I haven't found any like yours, but you have a good find there, maybe the largest I have seen here at SMF.

Some pictures of KEMET Tantalum capacitors:

KEMET trademark used to identify KEMET products.


KEMET T396


KEMET epoxy dipped tantalum capacitor


KEMET T350 epoxy dipped tantalum capacitor

which ones are the gold tipped transisters if you dont mind?

those 3 inch ones are magnetic on the positive end correct?...thanks

thanks for your reply!

which ones are the gold resisters...in the first photo?

Transistors - marked Q1, Q2, and Q3 on circuit board.

Originally Posted by gus4113

those 3 inch ones are magnetic on the positive end correct?...thanks

Both ends are magnetic.

Originally Posted by bigburtchino

I'M not 100% on this but your M39006 capacitors, should be "wet" tantalum capacitors. Similar to the Vishay-Sprague 285D Wet Tantalum Capacitors, Sintered Anode TANTALEX®, is a wet tantalum capacitor, hermetically sealed with extended temperature rating. Axial through-hole tubular metal case, with Tantalex components.



Are there any other marking's? Is the case diameter about 0.50 in. (1/2")? I haven't found any like yours, but you have a good find there, maybe the largest I have seen here at SMF.

Am I correct that the wet ones have a silver(Ag) case? These do not have a Ag case. They are a bit under .375" diameter. There is other markings present. However, they are in my outside work area and it's about 25 degrees with rain and winds gusting to 40 mph. Brrrrrrrr! So, maybe tomorrow on those other markings. The Octopart description only states, "CAPACITOR MIL TANTALUM"

Ok, so now I have one of the capacitors in front of me. First line = M39006, second = 01-3054, third = JAN with a 2 in a circle, fourth = 56289, fifth = 8337c sixth line = 70UF100V and lastly in very small font is 341520.

At work so I don't have my notes, so going on memory only. Wet tantalum capacitors have cases made of silver or tantalum as the "wet" electrolyte is a sulfuric acid solution.