Capacitor Choice

Discussion in 'The Projects Forum' started by emmy, Aug 10, 2006.

  1. emmy

    Thread Starter Member

    Aug 9, 2006
    22
    0
    Hi,

    I have been reading different articals on choice of capacitors.

    I am using a charge voltage of DC24-26Volts with an output of 2Amps.

    I will be charging some caps to hold firing current.
    This will be a short burst of via a SRC or some such device.

    Anyway I have been given several different answers on voltage rating for the Caps.

    Some say as close to operating voltage as possiable some suggest doubling the operating and rounding up.

    Is there any rule of thumb that should be followed ?
    or will any cap do ?
    I will probally be using 2 X 4700uF in parallel which will hold enough energy for the task.

    Thanks
    Emmy
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    Using a higher voltage rating than you absolutely need gives you a safety margin and may help extend the operating lifetime of the cap. By all means, double the voltage rating.
     
  3. emmy

    Thread Starter Member

    Aug 9, 2006
    22
    0
    Thanks,

    50 or 63V it is

    Emmy
     
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