The 20021121-00036T4LF is a 36-position, dual-row unshrouded pin header from the Minitek127® 1.27mm series by Amphenol ICC (FCI). The 1.27mm pitch and 0.050" row spacing let you route signals between two parallel PCBs with a compact footprint — the 36 circuits fit in a board area roughly 0.9" wide by 0.45" deep, leaving room for passives between rows on a two-layer board.
Surface-Mount Assembly and Contact Finish
Termination is surface-mount solder, which means the header reflows onto the board in a single pass alongside other SMD components. The post finish is 50.0µinch tin, which wets well during reflow and gives a visible solder fillet for inspection.