What indicators should be considered for good quality connectors
Recently, in the mailbox of Lilutong, many users asked about the question of "what indicators should be considered for a good quality connector". For connector purchasers, their biggest goal should be to purchase products that are of reliable quality and meet demand. However, the production of a connector is so complicated, how should a purchaser know whether the product quality is good or not? What are the selection indicators that buyers should pay attention to? The following Lilutong engineers will introduce you in detail which indicators should be considered for good quality connectors.
When choosing a high-quality connector, the indicators to be considered include 14 aspects, as follows:
1. The current carrying capacity index of the connector
Generally, the current carrying capacity of the connector power signal should be designed with a derating, while paying attention to the insulation withstand voltage between the pins.
Second, the impedance matching index of the connector
Some equipment signals have impedance requirements, especially radio frequency signals, which have more stringent impedance matching requirements. When impedance does not match, signal reflections will be caused, which will affect signal transmission. Of course, general signal transmission has no special requirements for the impedance of the connector.
Three, the shielding index of the connector
With the rapid development of communication products, EMC is getting more and more attention. The connector selected generally needs to have a metal shell, and the cable needs to have a shielding layer. The shielding layer must be connected to the metal shell of the connector to achieve the shielding effect. The plug part can be wrapped with copper skin by injection molding method, and the shielding layer of the cable and the copper skin can be welded together.
Fourth, the structural size index of the connector
In the process of producing connectors, the design of external dimensions is a very important step, because the connected devices will have certain space constraints, especially the single-board connectors, which cannot interfere with other components. Therefore, it is necessary to select the appropriate installation method according to the use space and installation location (installation includes front installation and rear installation, installation and fixing methods include rivets, screws, clamps or quick locking of the connector itself) and shape (straight, curved, etc.) , T-shaped, round, square).
Five, the connector's anti-misplug index
Connector anti-misplugging indicators are divided into two aspects. On the one hand, the connector itself. Rotation 180 degrees, misplacement and wrong connection lead to signal error connection. At this time, you need to pay attention to choosing anti-misplugging connectors as much as possible, or adjust the connector relative The positional relationship makes the assembly unique. On the other hand, in consideration of reducing the types of materials, several signals use the same connector. At this time, it may happen that the A plug is plugged into the B plug. At this time, you need to pay attention. If this happens, it will cause serious consequences. At this time, the A and B interfaces must be selected as different types of sockets.
Six, the reliability index of the connector
Because the main function of the connector is to provide signal transmission performance for the device, the connection part must be reliable (for example, surface contact is better than point contact, pinhole type is better than leaf spring type, etc.).
Seven, the general index of the connector
It should be noted that in the selection process of the connector, it is necessary to choose common objects as much as possible, especially among products of the same series. The selection of connectors has strong versatility, reducing material types, increasing quantities, reducing costs, and reducing supply risks. .
Eight, the use of environmental indicators of the connector
Generally, connectors have special performance requirements when they are used in outdoor, indoor, high temperature, high humidity, salt spray, mold, and cold environments.
Nine, the locking function index of the connector
Generally, in order to prevent the connector from falling off when mating with the device, it is necessary for the connector to have a locking function to ensure good contact performance.
Ten, the cost index of the connector
Cost is also a key factor in the connector selection process. With the increasingly fierce market competition, the connector's own cost and processing cost are issues that need to be considered comprehensively.
11. Supply index of connector
Generally, the supply of connectors is also affected by many factors. The supply of general-purpose connectors is better than that of non-universal connectors, and the supply of domestic products is better than that of foreign ones.
Twelve, the plug life index of the connector
The number of plug-in and pull-out times of the connector has a certain life. After the number of plug-in and pull-out times reaches the limit, the performance of the connector will decline. Some signal interfaces need to be usually plugged and unplugged. When selecting the connector, pay more attention to the plugging and unplugging of the connector. frequency.
13. The charging index of the connector
Usually you can choose the pin or hole type connector according to the often charged and uncharged conditions.
14. Comprehensive indicators of the connector
When purchasing electronic connector related products, various factors will appear. Therefore, comprehensive consideration is the more reliable way to choose a more suitable connector. The quality of the choice will affect the product to varying degrees at different stages.