Electrical connectors (hereinafter referred to as the connector) can also be known as plugs and sockets are widely used in various electrical circuits, plays the role of connecting or disconnecting the circuit. Improve the reliability of the connector is first and foremost the responsibility of the manufacturer. However, due to the connector of a wide range of wide range of applications, therefore, the correct choice of the connector is to improve connector reliability is an important aspect. Only joint efforts by producers and users, in order to maximize the function of the connector. The connector has a different classification. In accordance with the frequency diversity, high-frequency connectors and low-frequency connectors; even machine in accordance with the shape of sub-circular, rectangular connected machine; in accordance with the zoning, PCB with connectors, cabinets, connectors, audio equipment connectors. power connectors, special-purpose connector.

The following discusses the low-frequency connectors (frequency 3MHZ below) the choice of methods. Electrical parameters require that the connector is to connect the electrical wiring of electrical and mechanical components. Therefore, connector electrical parameters is to select the connector first thing to consider. Rated voltage, also known as operating voltage, it mainly depends on the insulating materials used in the connected machine, contact the spacing between pairs. Certain components or devices in less than its rated voltage may not be able to complete their proper function. The rated voltage of the connector is in fact the maximum recommended operating voltage for the production of plant should be understood. In principle, the connector can work less than the rated voltage. I tend to the pressure of the connector (the electric strength) indicators, in accordance with the use of the environment, the level of security requirements to a reasonable selection of the rated voltage. In other words, the same pressure indicators, depending on the use of environmental and safety requirements, you can use different maximum operating voltage. It is also more in line with the objective to use.

The rated current of the rated current, also known as the operating current. With rated voltage lower than the rated current, connectors generally able to work properly. In the design process of the connector, rated current of the thermal design of the connector to meet the requirements, because in contact with current flows due to conductor resistance and contact resistance, contact will heat. When the fever of more than a certain limit, will destroy the connector insulation and the formation of contact with the softening of the surface coating, resulting in failure. Therefore, to limit the rated current, in fact restrict the connector internal temperature does not exceed the specified value. The choice of when to pay attention to the question is: For multi-pin connector, rated current must be derated