Connector model selection must consider 10 criteria

Connector model selection must consider 10 criteria

A connector basically contains one of the more common parts in all electronic products. When we apply the connector, no doubt we don't expect to find out when the new project is nearing the prologue that we have to improve the content and adjust the new project to incorporate this modification.

A connector basically contains one of the more common parts in all electronic products. When we apply the connector, we certainly don't expect to find out as the new project nears the prologue that we have to improve the content and adjust the new project to incorporate this modification, which will result in increased time and cost. To better prevent the inconvenience of model selection, care must be taken when selecting connectors. The Lighting Wire World Network summarizes the entire process of connector model selection steps that must be noted. I hope it's easier for everyone to find connector products that meet their regulations.

How to choose the model of the connector?

1. Cable current carrying capacity

The cable current carrying capacity of the connector refers to the total flow of electricity that the connector cannot be installed outside the maximum rated temperature, and the rated current of this temperature generally includes the conductive temperature rise and the natural environment temperature. When selecting the connector for the data signal of the switching power supply, the cable current carrying capacity of the connector is more concerned, the design scheme of quota adjustment is selected, and the compression resistance of the intermediate insulating layer of the pin is paid attention to.

2. Construction Specifications

Connector size is critical. The connections in the commodity have certain indoor space restrictions, especially the double board connector, which cannot interfere with other components. According to the application of the indoor space, the installation part selects the appropriate installation method (installation before and after installation, installation and fixing methods include bolts, screws, clips or quick locking of the connector itself, etc.) and appearance design (direct, copper feet, T shape, ring ,square).

3. Matching resistors

The basic concept of electronic circuit matching resistance is that when the input resistance is equivalent to the resistance in the switching power supply, the load will reach high power. Some data signals have characteristic impedance specifications, especially RF signals, which are more stringent on matching resistors. The characteristic impedance mismatch will cause the data signal reflection surface, which will affect the data signal transmission. In general, there are no special requirements for the characteristic impedance of the connector.

4. Block out

With the development trend of communication equipment, EMC it becomes more and more important that the plug-in must have a plastic shell, and the cable must have a shielding layer. The shielding layer should be connected with the plastic shell of the plug-in to achieve the actual effect of shielding. The injection molding method can also be selected. The power plug part is packaged with copper skin, and the cable shielding layer is welded with the copper skin.

5. Anti-mistaken touch insertion

The housing must be accurately positioned before the contactor of all configurations can be engaged. After the electrical contactor housing is accurately positioned, the pin contactor can contact the plug contactor or the surface of the insulating layer mounting board to ensure that the contactor is properly oriented and will not be damaged; otherwise, the pin board is prone to bending during the entire insertion process.

6. Credibility

Connectors are used to connect data signals, so the connection part must be more trusted. For example, face contact is generally better than point contact, and eye of needle is better than leaf spring.

7. Practicality

In the whole process of selecting plug-ins, general raw materials should be selected as far as possible, especially in the middle of the same product series, the choice of plug-ins is very practical, reducing the type of raw materials, improving total cost control, and reducing supply risks.

8. Natural environment performance of connectors

The natural environment in which the connector is applied is very harmful to its performance. The key influencing factors include temperature, ambient humidity, strong acid and alkali, vibration and damage, and liquid prepreg, etc., which also jeopardize the working and service life of the connector.

9. Insertion frequency

Plug-ins have a certain service life. After the plugging frequency reaches the limit, the performance of the plug-in will decrease. When some data signal sockets must be plugged and unplugged frequently, it is necessary to pay more attention to the plug-in plug-in frequency when selecting plug-ins.

10. Inductive electrification status

Depending on the often-inductive power supply, choose a pin-type or board-hole connector.