Electronic components Capacitors together with resistors, inductors, and memristors, belong to the group of “passive components” for electronic equipment. the condenser is a passive two-terminal, Electrolytic Capacitor – Aluminium Electrolytic. Capacitor charging power supplies and other laser electronics. An electrolytic capacitor (occasionally abbreviated e-cap) is a polarized capacitor whose anode or positive plate is made of a metal that forms an insulating oxide layer through anodization. the capacitor is a component which has the ability or “capacity” to store energy in the form of an electrical charge producing a potential difference (Static Voltage) across its plates, much like a small rechargeable battery. This oxide layer acts as the dielectric of the capacitor.