Suntan Silver Mica Capacitors
Mica capacitors are currently used in some low power RF designs, and pulse (snubber) applications, but advances in ceramic capacitor performance have slowly eroded mica’s traditional edge in these areas over the years. Perhaps more importantly, mica capacitors tend to be bulky—a result of the relatively low dielectric constant. For example, a 300 pF dipped mica capacitor may be as much as 16 times larger (in volume) than a good 300 pF MLC (NPO) capacitor. This low volumetric efficiency is a serious drawback in many applications such as portable electronic equipment. Some chip mica capacitors are available, but they tend to be expensive. Mica capacitors are still indispensable in high-power RF transmitter applications. In the latter case special rectangular, cylindrical, and button-style cases are used. Another niche is high-voltage applications that are a result of mica’s high dielectric breakdown and corona resistance.
Suntan Silver Mica Capacitors are available with values that range from 1–22,000 pF, voltages are in the range 50–1000V for standard dipped mica capacitors. Mica capacitors exhibit very little voltage dependence, have high Q or conversely small power factors that are quite independent of frequency. With all these advantage, our mica capacitors are ideal for high requence and RF applications.
