ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 1
(2) Mica Capacitors. A MICA CAPACITOR is made of metal foil
plates that are separated by sheets of mica (the dielectric).
The whole assembly is encased in molded plastic. Figure 42,
view A, shows a cutaway view of a mica capacitor. Because the
capacitor parts are molded into a plastic case, corrosion and
damage to the plates and dielectric are prevented. In addition,
the molded plastic case makes the capacitor mechanically
stronger. Various types of terminals are used on mica
capacitors to connect them into circuits. These terminals are
also molded into the plastic case.
FIGURE 42. TYPICAL MICA CAPACITORS.