The basic properties of the terminal connectors can be divided into three categories: namely, mechanical properties, electrical properties , and environmental performance. Another important mechanical properties of the mechanical life of the connector . Mechanical life is actually a durability (durability) indicator. It is engaged with a separation of one cycle , to engage in a prescribed cycle after the separation of the connector terminal connection can complete its normal function ( such as the contact resistance value) as the basis for evaluation.

Terminals

1 . Mechanical properties on connectivity , the insertion force is important to mechanical properties. Insertion force insertion and extraction force is divided into ( pull force known as separation force ) , the two requirements are different. There are in the standard minimum and maximum insertion force required separation force , which indicates that , from the use point of view , smaller insertion force ( LIF to have low insertion force and the insertion force ZIF no structure ) , while if the separation force is too small , it will affect the contact reliability . Connector insertion force and mechanical life and contact structure ( positive pressure size ) contact area coating quality ( coefficient of sliding friction ) as well as contacts arranged dimensional accuracy ( degree of alignment ) related.

2 . The main electrical performance electrical performance of the connector terminals including contact resistance, insulation resistance and dielectric strength.

① the contact resistance of the electrical connector to be of high quality with a low and stable contact resistance . Connector contact resistance from a few milliohms to tens of milliohms range.

② measure insulation resistance between the insulation performance indicators electrical connector contacts and the contact member and the housing member , of the order of hundreds to thousands of megohms megohm range.

③ said electric strength or resistance, voltage, medium voltage, tolerance is the ability to characterize the connector between contacts or contacts with the housing rated test voltage .

④ other electrical properties.
Attenuation of electromagnetic interference of the evaluation of the connector EMI shield effect of electromagnetic interference of the attenuation of electromagnetic interference shielding effect of the evaluation of the connector , generally in the frequency range of 100MHz ~ 10GHz test .

RF coaxial terminal blocks concerned, there is the characteristic impedance , insertion loss, reflection coefficient , voltage standing wave ratio (VSWR) and other electrical indicators . Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signal , the emergence of a new class of high-speed signal connectors connectors that , accordingly, the electrical properties , in addition to the characteristic impedance , but also there are some new electrical indicators such as crosstalk (crosstalk), propagation delay (delay), time delay (skew) and so on .

3. Environmental performance of common environmental performance , including temperature , humidity , salt spray , vibration and shock .

Temperature currently connectors maximum operating temperature of 200 ℃ ( except for a small number of special high-temperature connector ) , the lowest temperature of -65 ℃.