A Board-to-Board Connector is a connector used to connect two circuit boards in an electronic device. It usually consists of two connectors, one connector fixed to one circuit board, the other connector fixed to the other circuit board, through pins inserted between the connectors to achieve electrical signal transmission.

Board-to-board connectors are commonly used in electronic devices that require high-density, reliable connections, such as computers, mobile phones, tablets, networking devices, and so on. It can transmit various types of signals, such as power, data, audio, video, etc.


Board-to-board connectors can be classified according to different characteristics and uses.

Connection mode:
Through-hole Connector: Connects by inserting pins directly into a hole in the circuit board.
Surface Mount Connector: The connection is made by welding to a pad on the surface of the circuit board.

Pin arrangement:
Single Row Connector: Pins on only one row are used to connect signal transmission between individual boards.
Dual Row Connector: Pins are distributed on two adjacent rows to connect signal transmission between two boards.

Pin spacing:
0.1" (2.54mm) pitch connector: The spacing between pins is 0.1 inches, the most common standard pitch.
Fine Pitch Connector: A connector with a pin spacing of less than 0.1", usually used in applications requiring high-density connections.

Power Connector: Used to transmit power signals.
Data Connector: Used to transmit data signals, such as USB, HDMI, Ethernet, etc.
Signal Connector: Used to transmit control signals or analog signals.
Combo Connector: A connector that integrates multiple functions to simultaneously transmit power, data, and signals.

Special Features:
Waterproof Connector: Waterproof, suitable for wet or liquid environments.
High Temperature Connector: can work in high temperature environment.
Magnetic Connector: Use magnetic adsorption to connect, easy to plug and remove quickly.


When choosing a board-to-board connector, there are several factors to consider:
Pitch requirements: Determine the pitch requirements of the connector, that is, the distance between the pins on both sides of the connector, to ensure that the connector can be properly aligned and connected.

Number of pins: Determine how many pins the connector needs based on the number of signals that need to be connected. In general, the greater the number of pins, the larger the connector, but the more types and numbers of signals that can be transmitted.

Voltage and current requirements: Select the connector according to the voltage and current requirements in the actual application to ensure that the connector can withstand and transmit the required voltage and current.

Environmental requirements: If the connector will work in harsh environmental conditions, such as high temperature, high humidity or vibration environments, you need to choose a connector with the corresponding waterproof, dust, and vibration resistance.

Reliability and life: Choose a connector with good reliability and long service life. In the case of frequent plugging, the durability of the connector is important.

Cost: Consider the cost of the connector according to the budget, and choose products with higher cost performance.

Other special features: If you need to support special features, such as hot swap, shielding, reverse insertion protection, etc., you also need to consider these special features.