Product Introduction
It uses a 0.100" (2.54 mm) pitch — the standard breadboard-compatible spacing that matches perfboard and DIP footprints. The header carries square male pins with a tin-plated mating surface rated for 5 A per circuit at 110 V, through-hole solder termination, and a black UL94 V-0 housing. This is a board-to-board interconnect, typically used as the pin header half of a pin-and-socket pair on a PCB.
The 0.100" (2.54 mm) pitch sets the pad spacing on the PCB and determines compatibility with standard prototyping boards. The 21-position count is an odd number, so the BOM likely calls for exactly 21 circuits rather than a standard multiple.
This is an unshrouded header — it mates with any standard 0.100" pitch single-row socket strip or IDC receptacle that accepts 0.025" square pins. Termination is through-hole solder, with a 0.095" (2.41 mm) post length for the solder tail and a 0.200" (5.08 mm) mating pin length. The overall contact length is 0.395" (10.03 mm). The insulation height of 0.100" (2.54 mm) sets the standoff above the board surface.