Capacitor manufacturers offer capacitor series that are specifically targeted on camera flash applications. For example, Rubycon has the FW series, and NCC has the PH series. These have working voltages of about 300V to 330V and a typical capacitance of 100μF to 150μF, so at first glance these seem to be standard high-voltage electrolytic capacitors. Nevertheless, they are designated for camera flash applications.
What makes these capacitors particularly suitable in terms of ESR, construction, etc. ?
Best Answer
Camera flash capacitors are constructed to have low resistance, and more importantly, low inductance, so that they can deliver their energy to the flash tube as quickly as possible — which means achieving a fast risetime on the pulse of current. The internal connections are also made more robust in order to avoid localized heating as a result of the high current.