PDA 3 Pin Header Right Angle , PA9T 2Mm Header Connector double row

Usually pin headers are through-hole devices (THD / THT), but surface mount devices (SMD / SMT) also exist. In the SMD case, the solder side of the pin is bent at a 90-degree angle for soldering to a pad on the PCB. On single-row SMD headers, the pins are bent alternately to one side or the other, and on double-row SMD headers, the pins are simply bent outward. If pin headers are optional, the THD variant is usually chosen for ease of hand assembly.

Headers can be straight (vertical) or right-angled, the latter form is sometimes used to join two PCBs together horizontally.

In most cases, the title has one or two lines, but some manufacturers offer three or more lines.

They are usually sold as long strips (usually 36 / 40 / 50 needles) that can be easily cut to the desired number of needles. Many lead lengths are available to minimize labor during PCB assembly.

Male headers are often associated with ribbon cable connectors. When used alone, they accept patch cords with 2.54 mm (0.1 in) and 2.00 mm (0.079 in) pitches.