Capacitor voltage ratings
Posted: Fri Jul 06, 2018 7:41 pm
I bought a stack of ceramic capacitors ages ago, surplus stuff. They were rated at 6.3V. Though I just hooked up one to my power supply and ran it at 50VDC and it did not fail. Even shorted it out times and then measured the value again fine. So I wonder if they just put 6.3V because they did not know the voltage..
On the other hand, I really have wondered if manufacturers are just charging more for higher rated voltages when they are exactly the same part as the lower voltage ones..
Take for example
6.3V £2.12p
https://www.mouser.co.uk/ProductDetail/ ... fZPonTM%3d
10V £2.42
https://www.mouser.co.uk/ProductDetail/ ... N1Qn2VI%3d
Then we get onto stacked caps..
16V £3.46
https://www.mouser.co.uk/ProductDetail/ ... YelHGS4%3d
Then other brands...
25V £7.24
https://www.mouser.co.uk/ProductDetail/ ... 4elw%3d%3d
Actually using such capacitors in my new power supply design.. Though as I need about 25VDC for the main input capacitors, I'm using the lower value.
But really, as anyone seen any information about all this anywhere ? I think manufacturers do do these tricks..
Though I don't really get how a supposed 6.3V , and run at 50VDC without blowing it up.. Course is possible these caps are actually higher voltage than the surplus place had them listed at.... Or it is possible there manufacturers just do a huge run up capacitors, or the same spec, and just list them at various prices when possibly they all could be much higher voltages than they quote..
On the other hand, I really have wondered if manufacturers are just charging more for higher rated voltages when they are exactly the same part as the lower voltage ones..
Take for example
6.3V £2.12p
https://www.mouser.co.uk/ProductDetail/ ... fZPonTM%3d
10V £2.42
https://www.mouser.co.uk/ProductDetail/ ... N1Qn2VI%3d
Then we get onto stacked caps..
16V £3.46
https://www.mouser.co.uk/ProductDetail/ ... YelHGS4%3d
Then other brands...
25V £7.24
https://www.mouser.co.uk/ProductDetail/ ... 4elw%3d%3d
Actually using such capacitors in my new power supply design.. Though as I need about 25VDC for the main input capacitors, I'm using the lower value.
But really, as anyone seen any information about all this anywhere ? I think manufacturers do do these tricks..
Though I don't really get how a supposed 6.3V , and run at 50VDC without blowing it up.. Course is possible these caps are actually higher voltage than the surplus place had them listed at.... Or it is possible there manufacturers just do a huge run up capacitors, or the same spec, and just list them at various prices when possibly they all could be much higher voltages than they quote..