Now whether in life or business applications, commonly used connector types are relatively wide, from D-type connectors to frequently used connectors have 12 categories, what are the principles of its selection? Mainly including the flow rate, impedance matching, shielding, versatility, cost, availability and other fourteen criteria, which can be said to be the connector selection to know the main points of knowledge, the following by Shenzhen connector manufacturer Xin Pengbo electronic technology to explain the fourteen standards;;

1. flow rate: in the selection of the power signal connector for the connector's flow rate is more concerned about the use of derating design, while paying attention to the insulation between the pins withstand voltage.

2. Structure size: connector size is very important, the connection in the product are certain space limitations, especially the single board on the connector, can not interfere with other components. According to the use of space, installation parts to choose the appropriate installation method (installation with front and rear installation, installation fixing rivets, screws, card ring or connector itself card pin fast locking, etc.) and shape (straight, curved, T-shaped, round, square).

3. Impedance matching: Some signals have impedance requirements, especially RF signals, impedance matching requirements are more stringent, impedance mismatch will cause signal reflection, thus affecting the signal transmission. General signal transmission of the connector impedance no special requirements

4. Shielding: With the development of communication products, EMC has been paid more and more attention to the choice of the connector when the need for a metal shell, while the cable needs to have a shielding layer, the shielding layer to be connected to the metal shell of the connector to achieve the shielding effect, you can also use injection molding method, the plug parts with copper skin wrapped, the cable shielding layer and copper skin welded together.

5. anti-mistake plug: anti-mistake plug two aspects: on the one hand, the connector itself, the connector itself rotated 180 degrees, misalignment error connection leads to signal error connection, at this time need to pay attention to the choice of anti-mistake plug connector as far as possible, or by adjusting the relative position of the connector relationship to make the assembly unique; on the other hand, for the sake of reducing the type of material considerations, several signals are used the same connector, at this time there may be A plug into the B plug up, then you need to pay attention to, if such a situation will cause serious consequences when the A, B interface must be selected for different types of socket.

6. Reliability: connectors are used to connect signals, so the connection parts to be reliable (such as surface contact is better than point contact, pinhole type is better than leaf spring type, etc.).

7. Versatility: In the selection process of connectors to choose as common as possible objects, especially between the same series of products, the choice of connectors with strong versatility, reducing the type of materials, increasing the number of cost reduction, while reducing the risk of supply.

8. Using the environment: connectors used with outdoor, indoor, high temperature, high humidity, salt spray, mold, cold and other environmental times, the connectors have special requirements.

Principles have, but also need good tools to improve the efficiency of the selection, and then look at what we expect from the selection tool: simple and clear, fast and easy; manufacturers are in, the device is complete; can make the advantage of the product smart stand out and so on. Unfortunately, at present, all kinds of selection tools are separate, it is difficult to have a colorful place, relatively well received only by the electronic components technology network selection of alternative tools collection, of course, the function of this tool collection needs to be improved. Here we go on to see the remaining several criteria;

9. locking function: In order to stop the connector with the time to fall off, to protect good contact, the connector needs to have a locking function.

10. Cost: Cost is also a more important factor in the selection process, with the increasingly competitive market, the appropriate choice of connector, the connector's own cost and processing costs need to be considered.

11. Availability: The supply of connectors will be affected by a number of factors, common connectors are better than the supply of connectors not common, domestic production than foreign production of good supply, etc.

12. Plugging frequency: connectors have a certain life span of plugging and unplugging, plugging and unplugging times to reach the limit, the performance of the connector will decline, some signal interfaces need to plug and unplug often when choosing a connector should pay more attention to the number of times the connector is plugged and unplugged.

13. Charged considerations: According to the often charged or not, choose a pin-type or hole-type connector.

14. Comprehensive consideration: In the process of selecting a connector, the various factors are not independent of each other, often interact, so we have to consider the connector selection process, choose the most appropriate connector, the choice of good or bad at different stages will affect the product to varying degrees.