The selection of electrical connectors contains the use of environmental conditions, electrical parameters, mechanical parameters, the choice of termination methods. Specific electrical parameters include requirements for electrical parameters, rated voltage, rated current, contact resistance, shielding, safety parameters, mechanical parameters, mechanical life, connection methods, installation methods and shape, environmental parameters, termination methods and so on. The following mainly introduces the development of electrical connectors with four characteristics and the three key technologies used in the development.

I. The development of electrical connectors has the following four characteristics

1, toward miniaturization, high density, high speed transmission direction of development;

2, towards high performance, high frequency technology;

3, high voltage, high current connectors are also in great demand in the market;

4, the connector also towards anti-interference technology, modular technology and lead-free technology.

II. High-speed electrical connectors in the development of the three key technologies used

1, in order to reduce crosstalk adopted by the differential signal, noiseless signal and grounding layer technology;

2. In order to adjust the connector leads, which can change the difference in delay due to unequal physical distances between the connector input and output;

3, in order to obtain the maximum transmission efficiency, the value of the characteristic impedance of the connector should match the characteristic impedance of the transmission circuit.