Board-to-board (BTB) connectors are used to connect printed circuit boards (PCB), electronic components that contain a conductive pattern printed on the surface of the insulating base in an accurate and repeatable manner.
Each terminal on a BTB connector is connected to a PCB.
A BTB connector includes housing and a specific number of terminals.
Terminals transmit the current/signal between PCBs connected by BTB; the housing is made of insulating material (mostly plastic).
BTB connectors are divided up into four mounting types: BTB connectors are selected by considering the mounting method, pin pitch, number of the rows (aka number of the ways), pin length, stacker height etc.