Classification of capacitors
By the nature of the work, there are three types of capacitors: constant, tuning
(half-variables) and variables.
Constant capacitors are classified by type of dielectric and
rated voltage.
USSR capacitors classification
The capacitor notation system consists of three elements:
- The letters К are a constant capacitor; КП - a variable capacitor; КТ - tuning capacitor; КН - nonlinear (varicond)
- Numbers indicating the material of the dielectric and the group according to the operating voltage (see table)
- Numbers indicating the type of capacitor
Classification of capacitor designations by the second element.
| Second element | Content |
| 1 2 3 4 10 15 20 21 22 23 31 32 40 41 42 50 51 52 53 54 60 61 70 71 72 73 77 |
Vacuum Air Gaseous Dielectric Solid Dielectric Ceramic for voltages up to 1.6 kV Ceramic for voltages above 1.6 kV Quartz Glass Glass-ceramic Glass Enamels Mica Low Power Mica Small High Power Paper for voltages up to 2 kV Paper for voltage over 2 kV Paper Electrolytic aluminum foil Tantalum Electrolytic Foil Volumetric Electrolytic Foil Foil Semiconductor Oxides Oxide Metal Aerial Vacuum Polystyrene Foil Metal Film Fluoroplastic Lavsan Polycarbonate |
The marking of USSR-made capacitors can be either alphanumeric,
containing an abbreviation for the above parameters, or color.
Large capacitors are marked in the following order:
type, rated capacitance, multiplier, tolerance, rated operating voltage.