1. Main components of aluminum electrolytic capacitors.

     Aluminum electrolytic capacitor includes anode and cathode foils separated by capacitor paper, impregnated by capacitor electrolyte, which performs as a cathode.
          Anode is an aluminum foil plate, the area of which after electrochemical etching by 50-300 times exceeds the area of the plain foil, and on which surface Al₂O₃ film is electrochemically formed. The oxide film thickness is directly proportional to the constant voltage, applied to the foil during oxide forming. Al₂O₃ performs as a dielectric in aluminum capacitors
          Cathode is an aluminum foil plate, the capacitance of which exceeds the anode capacitance.

2. Distinguishing features of aluminum capacitors produced by OJSC "Elecond".

K50-15 type. A distinguishing feature of this type is an extended operating temperature range: from -60 °Ñ to +125 °Ñ. For this parameter K50-15 type has no domestic alternates. Quality testing, conducted by OJSC "Elecond", showed that at +125 °Ñ the guaranteed service life of K50-15 type was minimum 1,300 hours (1,000 hours according to specifications) and minimum 10,000 hours at +60 °Ñ. K50-15 type is available in general purpose, military and specialized military series.
K50-17 type. The type is suitable for operation in pulse circuits and can be applied in laser as well as medical and welding equipment. Pulse frequency - 1/10 Hz max. Pulse quantity - 100,000 min. K50-17 type is available in general purpose series.
K50-27 type. The type is characterized by high rated voltage (400 and 450 V) and min 10,000 hours of operating life at +60 °Ñ; it is successfully used in converters, secondary power supplies, general purpose and military devices. K50-27 type is available in general purpose and military series.
K50-37 type distinction lies in high charge, accumulated on the plates. Major application fields are medical equipment, cash requesters, railway transport, power supplies, laser systems, welding equipment etc. This type is available in general purpose and military series.
K50-68 type design in full meets the requirements of the customers. The type is mainly used in audio and video equipment, car industry etc. The type is available in general purpose and military series.
K50-74 type. It is a capacitor with rigid snap-in terminals. The type is widely used in converters, being under load of low frequency (up to 300 Hz) rectified ripple current or high frequency (from 10 kHz up to 100 kHz) ripple current. K50-74 type is applied in audio and video equipment, cash requesters and is available in general purpose series.
K50-76 type. is a compacted, polar, fixed capacitor with axial wire leads. Its distinction lies in an extended range of working temperatures (from -60 °Ñ to +125 °Ñ); long operation period at high electric loads.
K50-77 type is a new trend in domestic capacitor production; this type has no alternates in Russia. The type is used in power converters, frequency converter units, rectifiers etc. K50-77 type is a preferred capacitor for electric motor cars and among domestic aluminum electrolytic capacitors it has the highest value of electric power. The operating temperature range is -40 °Ñ … +85 °Ñ. The type is available in military series.
K50-80 type is a low impedance screw capacitor. Its distinction lies in an extended range of working temperatures: -60 °Ñ to +100 °Ñ. The type is designed for power electronic devices and is available in military series.
K50-81 type is a radial low impedance capacitor. Its distinction lies in an extended range of working temperatures: -60 °Ñ to +100 °Ñ. The type is designed for power electronic devices and is available in military series.
K50-83 type. is a low impedance capacitor with radial wire leads. Design is compacted. The distinction is an extended range of working temperatures: -60 °Ñ to +100 °Ñ.
K50-84 type. is a low impedance radial screw capacitor. Design is compacted. The distinction is an extended range of working temperatures: -60 °Ñ to +100 °Ñ.
K50-85 type. is a compacted, polar, fixed capacitor with axial wire leads. Its distinction lies in an extended range of working temperatures -60 °Ñ to +125 °Ñ; long operation period at high electric loads.
K50-86 type. is a polar, radial screw capacitor with a compacted design in isolated case. Range of working temperatures: from -40 °Ñ to +85 °Ñ.