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Why are good capacitors so expensive, and why don't they make these any more?

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coppercone2:
https://twen.rs-online.com/web/c/passive-components/capacitors/single-layer-ceramic-capacitors/?applied-dimensions=4294826632,4294880097

thats likely one of the best through hole capacitors money can buy.
gotta put together a kit >:(

TimFox:
So that’s what they’re calling them now.
Those are “disc ceramic capacitors” in 20th-century English.
Under that name and Ceramite brand, I used that exact series for RF purposes before retirement, and they worked very well.
A factory engineer gave me the power dissipation ratings for the different sizes, but I have lost the values.

HalFET:

--- Quote from: TimFox on December 31, 2023, 11:25:06 pm ---So that’s what they’re calling them now.
Those are “disc ceramic capacitors” in 20th-century English.
Under that name and Ceramite brand, I used that exact series for RF purposes before retirement, and they worked very well.
A factory engineer gave me the power dissipation ratings for the different sizes, but I have lost the values.

--- End quote ---
Yeah, and the issue with that is also that the heat dissipation capacity of ceramic capacitors can actually change quite a bit depending on the exact construction, so it's a pretty good idea to only use figures from the manufacturer itself for that specific series. Something simple in a packaging step that has no appreciable electrical performance effect can have a tremendous effect on the ability to get heat out of the device, we ran into some serious issues with this when working in rarefied atmospheres because a manufacturer changed a packaging step (laser welding vs. ultrasonic welding) and it meant that the heat transfer to the component leads became less efficient, so we could no longer guarantee that all the devices on the board stayed within the specified temperature range in fault cases.

coppercone2:

--- Quote from: TimFox on December 31, 2023, 11:25:06 pm ---So that’s what they’re calling them now.
Those are “disc ceramic capacitors” in 20th-century English.
Under that name and Ceramite brand, I used that exact series for RF purposes before retirement, and they worked very well.
A factory engineer gave me the power dissipation ratings for the different sizes, but I have lost the values.

--- End quote ---

careful they have disk MLCC

those are SLCC

its a monolithic structure vs a cuban sandwich

Roehrenonkel:
Hi MathWizard, happy new-year,
 
may i point the gentlemen to my add:
https://www.eevblog.com/forum/buysellwanted/fs-(deeuww)-mica-caps-(nos-tht)/msg4052422/#msg4052422
...still have thousands of mica-caps.

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