The Amphenol BERGSTIK II 91276-131HLF is a single-row, 31-position male pin header on the standard 0.100" (2.54mm) pitch. It's an unshrouded, through-hole solder part with push-pull mating — a workhorse for board-to-board or wire-to-board interconnects where you need a straight, unkeyed pin strip. The 31-position count is less common than 30 or 32, so confirm your BOM circuit count matches exactly before committing. Rated 5 A per circuit at 110 V, with 30.0µin (0.76µm) gold or Gold GXT plating on the mating surface. The phosphor bronze contacts and UL94 V-0 black housing round out a standard industrial-grade build.
Board layout and footprint
The 0.100" (2.54mm) pitch matches the standard 0.1-inch grid, so it drops onto breadboard or perfboard without layout surprises. The 0.225" (5.72mm) post length gives enough through-hole depth for a 1.6mm PCB with room for a solder fillet. Overall contact length is 1.225" (31.12mm), with the mating pin extending 0.900" (22.86mm) above the insulation — that's a long pin, so check your stack-up height if you're mating to a receptacle in a tight enclosure.
There's no keying shroud, so the mating connector must provide its own polarization if needed.