What Is a Pin Header?
A pin header is a terminal that is attached to a printed circuit board. An example of usage is to attach a pin header to a breadboard, connect a PICkit, and write programs to the PIC microcontroller.
Terminals are plated with gold or tin. They are often long and narrow, with as many as 40 pins in a row that can be removed one at a time, often with cutters or nippers. If the diameter of the pin header does not match, it will not fit into the holes on the board, so be careful not to get the size wrong.
Uses of Pin Headers
Pin headers are attached to boards such as breadboards and universal boards to facilitate signal input and external connections. Although most commonly used for wire-to-wire connections, they are also used as connectors for circuit switching.
The common 2.54mm pitch type is often used, but there are variations in size and length, and one side is bent into an L shape.
They are used for internal connections in a variety of electronic devices such as in-vehicle controls, industrial equipment, computers, communication equipment, medical equipment, storage devices, and home appliances.
Principle of Pin Headers
It is made up of a pin, which is a conductor, and a housing, which is an insulator and serves to connect circuits. These connectors are available in male or male-female types on both sides. The male-male type has pins on both ends and can be attached to a board. Breadboards can be used by simply plugging them in, while universal boards require soldering.
The material is brass, which is either tin-plated or gold-plated. Gold plating is more durable and effective in preventing rust. The operating temperature range is -40°C to 105°C. Single-row or double-row types are available, depending on the application. The rated current and voltage must not be exceeded.
Pin headers that connect boards should be soldered on both ends. They can also be used for flexible boards by using a reinforcing plate. A pin head may also be used to serve as a mounting connection between a flexible board and a rigid board. Female connectors may also be used to enable connection and disconnection.