Some suggestions on the use and processing of electrical connectors
In the category of connectors, electrical connectors are one of the more popular products. It is a board-level interconnect product. Every manufacturer of connectors should familiarize themselves with what factors will affect the processing of the product. Design and use to deal with problems. Konnra connectors are intended for the use and processing of electrical connector products. There are some pertinent suggestions I want to tell you, let us take a look at these suggestions.
Regarding the use and processing of electrical connectors, the suggestions given by Dessau editors can be summarized, and 14 points can be summarized. The specific contents are as follows:
1. Please strictly follow the standard packaging and template recommendations of the connector.
2. Due to mechanical interference and corrosion, unused flux has problems in the connector.
3. Please read the notes on the drawing and the recommended template and PCB layout when processing the connector.
4. The contacts and terminals of the connector are made of very fine copper, and abuse will bend these contacts and terminals.
5. SnPb coating is still an excellent coating for solder tails and solder paste of electrical connectors. If possible, use it as much as possible.
6. The longer the connector, the greater the problems of coplanarity, soldering, and board-to-board or connector-to-connector alignment.
7. It should be noted that although most of the connectors have been soldered, few of these connectors use gas phase soldering during testing.
8. The design of the feet will not affect the mating height and Z direction of the connector, and the support should also allow the connector to mate freely in the X and Y directions.
9. If you do not need Au when processing connectors, especially on the solder tail, please specify Sn, because gold in solder joints is more prone to problems than tin.
10. Carefully use fine pitch connectors with a pitch of less than .050 inches (1.27 mm) because it is the only means of mechanical stability between large or heavy PCB components.
11. The connector is made of plastic. If used improperly, the plastic will have problems of cracking, cracking, warping and bending, and the inclined fit and unfit will promote plastic damage.
12. Remember not to pull the cable to disconnect the cable connector, because when pulling the cable, unless the stress can be eliminated, the cable will be pulled away from its termination, at the non-welded cable terminal (such as IDC connector ), this is even more problematic.
13. Superimposed tolerances of connectors can also cause problems. For example, if you insert a long-side card into three different connectors, the tolerances may overlap and cause mechanical interference. So it is best to have three separate edge cards in the examples used.
1. Please strictly follow the standard packaging and template recommendations of the connector.
2. Due to mechanical interference and corrosion, unused flux has problems in the connector.
3. Please read the notes on the drawing and the recommended template and PCB layout when processing the connector.
4. The contacts and terminals of the connector are made of very fine copper, and abuse will bend these contacts and terminals.
5. SnPb coating is still an excellent coating for solder tails and solder paste of electrical connectors. If possible, use it as much as possible.
6. The longer the connector, the greater the problems of coplanarity, soldering, and board-to-board or connector-to-connector alignment.
7. It should be noted that although most of the connectors have been soldered, few of these connectors use gas phase soldering during testing.
8. The design of the feet will not affect the mating height and Z direction of the connector, and the support should also allow the connector to mate freely in the X and Y directions.
9. If you do not need Au when processing connectors, especially on the solder tail, please specify Sn, because gold in solder joints is more prone to problems than tin.
10. Carefully use fine pitch connectors with a pitch of less than .050 inches (1.27 mm) because it is the only means of mechanical stability between large or heavy PCB components.
11. The connector is made of plastic. If used improperly, the plastic will have problems of cracking, cracking, warping and bending, and the inclined fit and unfit will promote plastic damage.
12. Remember not to pull the cable to disconnect the cable connector, because when pulling the cable, unless the stress can be eliminated, the cable will be pulled away from its termination, at the non-welded cable terminal (such as IDC connector ), this is even more problematic.
13. Superimposed tolerances of connectors can also cause problems. For example, if you insert a long-side card into three different connectors, the tolerances may overlap and cause mechanical interference. So it is best to have three separate edge cards in the examples used.
14. The best predictor of connector performance is normal force. If the options between the two connector series are given, and all other properties are equal, then choose a connector with a higher normal force, which is important in harsh environments, if the environment will be subjected to extreme temperatures or strong shocks and vibrations , This is particularly important.
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