The Amphenol 87900-140HLF is the 40-circuit dual-row member of the BERGSTIK II unshrouded pin header series, designed for board-to-board stacking at 0.100" (2.54mm) pitch. Push-pull fastening and through-hole mounting suit it for production board assembly; the 5 A per contact rating reflects phosphor bronze contacts carrying power or signal across the interboard joint. All 40 positions are loaded, and the contact finish reads gold or Gold GXT at 30.0µin (0.76µm) thickness — the GXT grade is the higher-wear option for repeated mating.
Mates with the matching BERGSTIK II dual-row IDC receptacle or any 0.100" pitch, 2-row socket housing in the series. The unshrouded pin profile accepts any compatible receptacle with adequate slot width — check keying features on the mating half against the BOM position. Voltage rating is 110 V — adequate for logic-level and most industrial signal bus duties; above that threshold the board designer should check clearance and creepage against the application's safety plane.