A circular connector is a connector whose basic structure is a cylindrical shape with a circular insertion surface. In the interconnection classification, it belongs to the fifth category and is used for interconnection between devices. The broad classification includes low frequency circular connectors, RF coaxial connectors, audio connectors, etc. The cylindrical structure of circular connectors is inherently robust, stronger than any other shape.

一, the characteristics of circular connectors.
Small size and high reliability. The plugs and sockets of circular connectors are mostly screwed, and the number of terminals ranges from 2 to 100 to meet the needs.

二. the basic structure of the circular connector.
1. Contacts.
The contact piece is the core component of the circular connector to realize the electrical connection function. Generally, a contact pair is formed by a female contact piece and a male contact piece, and the electrical connection is realized by the insertion of the female contact piece and the male contact piece.

Most of the accessories have general-purpose parts and standard parts, and are mainly divided into structural accessories and installation accessories. Structural accessories such as positioning pins, retaining rings, connecting rings, sealing rings, guide pins, positioning keys, cable clamps, gaskets, etc.

3. Insulators.
The insulator is also called a base or a mounting plate, and its function is to discharge the contacts at the required positions and intervals to ensure the insulation performance between the contacts and between the contacts and the housing.

4. Housing.
Also known as the housing, it is the outer cover of the circular connector that provides mechanical protection for the decoration of the insulating mounting plate and pins, provides alignment of the plug and socket when they are inserted, and secures the connector to the device.