Note lifetime is at full rated ripple current, which for one of those big coke cans is typically 15 amps & up, and lowering ripple also increases lifetime.
If current draw is essentially steady, such as for preamps or class-A amplifiers, choke-input filters can reduce ripple by ~10x.
If current draw is essentially steady, such as for preamps or class-A amplifiers, choke-input filters can reduce ripple by ~10x.
As @DSP_Geek pointed out re the lifetime; for the expense: the ripple current rating as well as the overall robustness. They are much larger than a leaded or snap-in capacitor of the same ratings - this translates into a much higher thermal mass/radiant area and the resultant ability handle higher currents on a prolonged basis. The temperature rise due to self heating is significantly reduced over another, smaller capacitor and it will have greatly increased durability and a much longer effective lifetime over a much smaller equivalent leaded one even though the "on paper" specifications are the same. They are designed for continuous, high current operation such as large computing or industrial power supplies as opposed to light duty consumer power supplies or audio applications.
Hal
Hal