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Thread: Caps, inductors, transformers affect on performance and reliability?

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    Default Caps, inductors, transformers affect on performance and reliability?

    Caps, inductors, and transformers are major electrical component in PSUs, but their spec is barely mentioned in reviews or discussions.
    Cap specs like leakage current, ESR, ESL or inductor core materials, transformer structure etc...
    Are they considerable factors when talking about performance and reliability? Not mentioned because they are just minor factors?

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    Thoughts from one who is no expert in this field:


    Performance is measured directly, but reliability is harder to predict; a capacitor placed near a heatsink comes to mind and may have reliability issues even if of top specs.

    Newer topologies can be less harsh on the switching transistors.

    The primary capacitor might receive too much voltage when the supply is driven off a rectangular wave UPS, there are so many factors at play; one reason the military sometimes use old, proven technology.

    The main transformer and inductors rarely fail, so are not normally of concern when it comes to reliability.

    Specs cannot always be trusted, capacitors of similar specs may have differing reliability, depending on the manufacturer.
    Last edited by ashiekh; 4 Weeks Ago at 12:15 PM.

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    Quote Originally Posted by rgbodosk View Post
    Are they considerable factors when talking about performance and reliability? Not mentioned because they are just minor factors?
    Design of the Circuit, normal operation temperature and current for example.
    Thosa are MAJOR Factors that tend to be overlooked.

    ANd thus: A good Circuit with not so great caps can last longer than a circuit with good quality caps, if the good caps are treated very badly and the not so good caps very well.
    Quote Originally Posted by ashiekh View Post
    a capacitor placed near a heatsink comes to mind and may have reliability issues even if of top specs.
    Near a Heatsink isn't enough, it has to be right next to it. 2mm away can be enough for it to be cold enough...

    But there is an even worse position:
    Between secondary Heatsink and the Secondary...

    This sounds bad and it was. There was an older FSP Design from mid-2000s that had this design. ANd also had other Problems as well...

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    rgbodosk (4 Weeks Ago)

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