General information about electrical connectors

Connectors, or, as it is also called in the specialized literature, an electrical connector is an article by means of which an electromechanical connection of one or more conductors is performed. At the same time, the electrical circuits must be de-energized. The most familiar option is the socket and the plug. The number of contacts is unlimited.

Today, contacts are made of inexpensive metals with good electrical conductivity (composites, aluminum or copper and their alloys). Often they are covered with precious metals (platinum group metals, gold, silver) for better current conductivity. In the Soviet era, such components were made of gold, silver, and platinum in order to improve the quality of signal transmission, especially in electrical connectors intended for the military industry. Now they (connectors) are just sprayed, to prevent contacts from oxidation.


  • Automated, robotic production processes.
  • Video and audio equipment.
  • The military industry.
  • Space, deep-water vehicles.
  • Equipment for medicine.
  • Research laboratories for various purposes.
  • Radars.
  • Telecommunication systems.
  • The nuclear industry.
  • Experimental physics and many other spheres, including home and life.

In all species contact groups consist of always round (almost always) pin (metal) and an elastic plate. Many professionals call this group “dad” (pin) and “mother” (plate). In order to connect/output an electro signal, almost to all connectors there are cables that are inserted into the connectors through the cable entry, which is a special input. In order to prevent undesirable bends and wire breaks, many types have special cushioning tubes.

The connectors are equipped with a special “key” – a groove that will help prevent the wrong connection of different parts, showing the only correct connection.

Separation by types according to several parameters


  • High-voltage connector (more than 50 volts).
  • Low-voltage connector (less than 50 volts).


  • Feeding.
  • Video/audio.
  • Signal connector.
  • Computer.
  • Others.

Frequency range

  • High-frequency.
  • Low-frequency.

Type of installation

  • The wire.
  • Panel.
  • Panel.

Current strength

  • High-current.
  • Low-current.

Electrical connection to the terminals

  • By soldering.
  • Crimping.
  • The terminal screwя.

General characteristics

  • Allowable voltage, current.
  • Number of contacts.
  • Contact resistance.
  • Pressure contact.
  • Electroconductivity.
  • Operating frequency range.
  • Operating frequency range.
  • Insulation resistance.
  • Dimensions.
  • Number of connection/disconnect cycles.
  • Operational conditions, mechanical, climatic.
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