What is the board-to-board connector? Its types, working,advantages, disadvantages & Applications

A board-to-board connector is a type of electronic connector that allows for the connection of two printed circuit boards (PCBs) or modules. These connectors come in a variety of types, each with their own advantages, disadvantages, and applications.

Types of board-to-board connectors:

  1. Through-hole connectors – These connectors have pins that pass through holes in the PCB and are soldered to pads on the other side of the board. They are easy to use and provide a reliable connection, but they can take up a lot of space and are not ideal for high-density applications.
  2. Surface-mount connectors – These connectors are attached to the surface of the PCB using solder paste and a reflow process. They are smaller than through-hole connectors and are ideal for high-density applications, but they require more precise assembly and may be more fragile.
  3. Board-to-board stacking connectors – These connectors allow two or more PCBs to be stacked on top of each other. They often have a low profile and are ideal for space-constrained applications.
  4. Board-to-board mezzanine connectors – These connectors are used to connect two PCBs that are perpendicular to each other. They are commonly used in computer and telecommunications equipment.

Working of board-to-board connector:

Board-to-board connectors typically have a male and female component, with one component attached to each PCB. The male component usually has pins or contacts that fit into a socket or receptacle on the female component. When the two components are connected, the pins or contacts make a secure electrical connection between the two PCBs.


  1. Flexibility – Board-to-board connectors allow for modular design, which means that individual PCBs can be swapped out or upgraded without needing to replace the entire system.
  2. Reliability – Board-to-board connectors provide a secure electrical connection between PCBs, which reduces the risk of loose connections or intermittent faults.
  3. Customization – Board-to-board connectors can be customized to fit specific design requirements, such as high-speed data transfer or low-profile applications.


  1. Cost – Board-to-board connectors can be more expensive than other types of connectors.
  2. Assembly – Board-to-board connectors require precise assembly, which can be time-consuming and costly.
  3. Space – Some board-to-board connectors can take up a lot of space, which can be a problem in small or densely packed systems.


  1. Consumer electronics – such as smartphones, tablets, and laptops.
  2. Industrial equipment – such as robotics and automation systems.
  3. Medical equipment – such as imaging and diagnostic devices.
  4. Telecommunications – such as routers and switches.

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