Hearted Youtube comments on DENKI OTAKU (@DENKI-OTAKU) channel.
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Thanks for the video 🙂
If you want a tip for another funny explosive experiment, find an old AT/ATX PSU for 120V AC, and plug it into 240V AC. The bang is really loud, as the primary capacitor pops.
That's a pretty neat ATX PSU BTW, that you have there! Such a long row of solid polymers (and wet elyts just next to them). In the PSU's that I'm used to seeing, I get a wet elyt for +12V and two more for 3.3V and that's about it.
For some reason, the solid poly capacitor technology is limited to low double digit voltages. Only some hybrid models reach higher double digit volts, and although they do have a fairly nice ESR, their capacitance in the higher voltage range is abysmal. Thus, for the SMPS primaries in 120V/240V PSU, your only choice is a wet elyt. Still you shoud pay attention to brand and model, fit for the purpose/application.
Solid polymer caps are a no-brainer for SMPS/VRM secondary positions, or in general for voltages of 12V and below (maybe up to 24V with no big problem). But they do also have marginal downsides:
1) they are sensitive to moisture. Moisture increases their risk of failure.
2) they have a non-trivial leakage current. Which doesn't matter for power filtering applications, but makes them unsuitable for timing / filtering and general signal applications, where the capacitor may need to be charged by resistors in the kiloOhms or above (currents below a milliAmp) and needs to be relied on to act properly.
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