Nowadays, electronic products are more and more commonly-used. Many electronic products are inseparable from board to board connectors. There are also board-to-board connectors in the field of industrial automation. It can be seen that the demand for board to board connectors is still relatively large in the future. It is very important for users to choose and choose the board to board connectors correctly. So, how to choose the right board to board connector and what are the purchasing standards?
How to select the size of the board to board connector?
How to select electrical parameters of board to board connector?
What should you pay attention to when choosing board to board connectors?
How to select the size of the board to board connector?
In recent years, the trend of board to board connector is becoming smaller. The common board to board connector spacing for handheld consumer electronics devices is 0.40 mm, while the 1.00 mm stack height is a small connector, with connectors currently being used by major OEMs as low as 0.70 mm, sometimes even lower. Several years ago, the older miniconnectors with a width of more than 4.00 mm were replaced by connectors with a width range of 3.40 mm. The current "narrow body" board-to-board connectors concept usually ranges from 2.40 mm to 2.60 mm. When purchasing board to board connectors, in addition to the basic issues such as circuit size, stack height and width, there are several things to consider:
1. Really, the smaller the better? If you're willing to accept a smaller vacuum port pick-up area, you may be right. Before choosing the board-to-board connectors, you must check that the connector has all the other properties you need and carefully test it to make sure it is robust enough.
2. Second, sockets with top mounted connectors need to be selected, because this setting can run under the socket of the board to board connectors and is likely to facilitate the use of conformal coatings.
3. These new, more powerful board-to-board connectors sound great! Yes, but you may need to tolerate additional connector lengths in order to achieve the locking function required by these board to board connectors; greater disconnection often means greater engagement, which may also cause problems for larger circuits.
How to select electrical parameters of board to board connector?
The board to board connector is an electromechanical component that connects electrical circuits. Therefore, the electrical parameters of the board-to-board connectors itself is the first problem to be considered when selecting the board to board connectors. Withstand voltage is the critical voltage that can withstand higher than the extra voltage in the regular time between the mutual insulation parts of the contact pair or between the insulation part and the grounding without breakdown phenomenon. It is affected by contact distance and geometry, insulator material, and ambient temperature and humidity, and atmospheric pressure.
What should you pay attention to when choosing board to board connectors?
1.Observe that the voltage loaded on the board-to-board connector does not exceed 50% of its rated voltage.
2. Mounting dimensions of the board to board connector for plug-in headers, the length of the soldering feet soldered to the PCB requires that the part that exposes the PCB is greater than 0.5mm.
3. For the board-to-board connectors with higher precision, use the model with positioning pins as much as possible when the PCB space allows, so as to facilitate the operation when manual soldering is required.
4. Is there a foolproof design in the board to board connectors?
5. Whether the materials of the board to board connectors used contain lead.
6. Touch resistance: small-volume board-to-board connectors with low contact pressure. It is recommended to use gold-plated or silver-plated connectors for applications with lower currents and voltages to avoid signal effects caused by film resistance.
7. Observe the height of the board-to-board connector after mating, whether it meets the soldering height of components around the PCB. The matching height must be greater than the soldering height of the components around the PCB, and there must be a certain margin to ensure that there is no interference. Special attention should be paid to the possible height errors of components after PCB soldering.
I believe that after reading this article, you will have a certain understanding of how to choose the right board to board connector.
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