Electronics > Repair
Low-leakage tantalum capacitors for detonating explosives
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tggzzz:
To anybody that reads this "Repair" sub-board, that headline to an article states the blindingly obvious.

The only surprise is that it hasn't been suggested before  :-DD

Even after reading the article, I like the concept :)
tszaboo:

--- Quote ---Use is foreseen storing ignition energy in remote detonation systems for mining and demolition.
--- End quote ---
One would think the use is: using it at it's voltage rating as an ignition source.
tggzzz:

--- Quote from: tszaboo on July 04, 2024, 11:46:47 am ---
--- Quote ---Use is foreseen storing ignition energy in remote detonation systems for mining and demolition.
--- End quote ---
One would think the use is: using it at it's voltage rating as an ignition source.

--- End quote ---

Doesn't even have to be at the rated voltage :( A 15V tant on a 13V line is sufficient. C911 (of course!) took out R965.
David Hess:
Just had a epoxy dipped solid tantalum capacitor fail in my Tektronix PG506.  It gradually overheated, cracked, and started oozing molten metal, and it is not the first time this PG506 has done this.  Last time I was watching it when it happened, and I changed all of the similar solid tantalum capacitors.  Now I have more to change, and need to check the regulator circuits.

Tantalum capacitors might fail in this way when the power supply has current limiting.
tszaboo:

--- Quote from: tggzzz on July 04, 2024, 12:31:47 pm ---
--- Quote from: tszaboo on July 04, 2024, 11:46:47 am ---
--- Quote ---Use is foreseen storing ignition energy in remote detonation systems for mining and demolition.
--- End quote ---
One would think the use is: using it at it's voltage rating as an ignition source.

--- End quote ---

Doesn't even have to be at the rated voltage :( A 15V tant on a 13V line is sufficient. C911 (of course!) took out R965.

--- End quote ---
I was making a revision in a board, where the 25V rated tantalum on a 24V rail was catching on fire in the ATE in about 1% of the cases. Nice green flames.
I don't use tantalum for ATEX for some reason.
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