Board-to-Board Header for Standard 0.100" Grids
The FCI 87901-410HLF is a 10-position, dual-row unshrouded header from the BergStik® II series, built on the 0.100" (2.54mm) pitch that defines the classic through-hole footprint. Rated 5A per contact at 110V with a UL94 V-0 black housing, this header suits power and signal distribution on a standard 0.100" grid. The 0.820" (20.83mm) mating pin length gives good reach into a standard receptacle, while the 0.120" (3.05mm) solder tail fits a typical 1.6mm PCB without bottom-side clearance issues.
Tin Plating and the Real Duty Cycle
The 100.0µin tin-on-phosphor-bronze mating finish is the spec that governs the real application range. For a board-to-board header that gets mated once and stays put, tin saves cost without compromising contact resistance. The 5A per-contact rating assumes all 10 positions are loaded and the ambient stays within the housing's thermal limits. In practice, derate if you're running continuous current near the maximum in a warm enclosure — the 0.100" pitch limits the copper cross-section between pins.