How to buy and connect the board-to-board connector

Nowadays, the connector electronic components market is fiercely competitive. From the earliest appearance of the fpc connector to the current board-to-board connector specification model, it seems that the connector needs in the field is still quite large, but we found that only for The earliest fpc connections are more connected. There is not much knowledge about what to pay attention to when choosing a board-to-board connector and how to connect them. The following is a small series to explain how to buy and connect the board-to-board connectors.

Board to board connector purchase attention

1. The voltage applied to the board-to-board connector should not exceed 50% of its rated voltage.

2. Mounting Dimensions for Board Connectors For the insertion of headers, the length of the soldering feet soldered to the PCB requires that the portion of the PCB board be exposed to be larger than 0.5 mm.

3. In the precision-tight board-to-board connector, try to use the model with positioning pin when the PCB space allows, which is convenient for manual welding.

4. No anti-dwelling design.

5. Whether the material used contains lead.

6. Touch resistance: small-size board-to-board connector, small contact pressure, use of low current, voltage, it is recommended to use gold-plated or silver-plated connectors to avoid the influence of the film resistance.

7. It is intended to observe whether the height of the board-to-board connector is matched to the welding height of the components around the PCB. The mating height must be greater than the welding height of the components around the PCB, and a certain margin is ensured to ensure no interference. Special care should be taken to consider that there may be height errors in the components after PCB soldering.

Board-to-board connector connection circuit connection

The board-to-board connector is for electrically connecting two mutually separated circuit boards, including a first connector that is connected to the circuit board and a switch connector for serially connecting the first connector, wherein the first connection The device is provided with a first terminal that is connected to the circuit board and a body that houses the first terminal. The adapter connector is provided with a second terminal and a body for accommodating the second terminal. The two extended ends of the second terminal can be respectively mated with the first terminal to achieve a first connection with the two circuit boards respectively. The electrical connection of the device, wherein the end of one of the first terminal and the second terminal has an elastic portion that is reversely bent, and the body and the second terminal can be selected according to the spacing requirement of the circuit board. Extension length.

Board-to-board connector troubleshooting

When the board-to-board connector has an open circuit failure, it may be caused by broken wires during use, poor connector contact, and loose connector terminals. Since the failure of the wire to break in the middle is very rare, it is mostly disconnected at the connector. Therefore, the inspection should focus on carefully checking the sensor and the wire connecting the cable, if there is looseness and poor contact. The board-to-board connector disconnection failure caused by poor contact is often caused by corrosion of the connector end, external dirt entering the terminal or connecting to the socket, thereby causing a decrease in contact pressure. At this point, just remove the board-to-board connector and re-install it to change its connection and return it to normal contact.