Rectangular connectors mainly have the following categories:

1. In the past, it was mainly CA, CB, CD type rectangular connectors produced by enterprises affiliated to the Ministry of Electronics Industry.

2. The CH-type rectangular connectors produced by enterprises affiliated to the Ministry of Electronics are mostly used now.

3. J-shaped rectangular connectors mainly produced by enterprises affiliated to the Ministry of Aviation and Aerospace.

4. Rectangular connectors produced according to the national military standard (GJB).

5. Rectangular connectors produced according to the International Electrotechnical Commission Standard (IEC).

Electrical properties:

1. Contact resistance: The micro-rectangular connector using twist pins can better ensure its contact reliability due to its multi-point contact.

2. Rated voltage: If the micro-rectangular connector works at a higher voltage than the rated voltage for a long time, the insulating material will fail and damage the connector.

3. Rated current: The value of rated current has been determined during product design. Excessive current will cause excessive heat generation and easily damage the insulator and cause failure. The use current cannot be arbitrarily increased during use. To achieve high reliability, attention should be paid to derating. Use, generally according to 75 ~ 85% of the rated current to consider.

4. Insulation resistance: Insulation resistance is related to the material selected and the environmental conditions used. Generally, it will decrease under conditions such as high temperature or humidity.

5. Dielectric withstand voltage: refers to the ability to withstand instantaneous peak voltage breakdown caused by instantaneous on and off, etc. between mutually insulated contact parts and between parts such as the casing, etc., and the material of the insulator, the ambient temperature (temperature). High unfavorable), humidity (high humidity unfavorable), atmospheric pressure (low air pressure unfavorable) are all related, and should also be used according to the regulations of the micro-rectangular connector manufacturer.