The Amphenol ICC (FCI) BERGSTIK II 91276-420HLF is a 20-position single-row unshrouded header on 0.100" (2.54 mm) pitch, built for through-hole solder attachment to a PCB. The 0.100" pitch gives enough creepage for the 110 V rating without forcing an oversized board footprint, and it matches the standard 0.100" IDC socket footprint used across the industry. That's a heavy tin layer — good for moderate-cycle applications (50-100 mates) in clean, dry environments. The phosphor bronze base metal provides spring retention and corrosion resistance consistent with the tin plating system. Overall contact length is 1.225" (31.12 mm) with a mating length of 0.900" (22.86 mm) and a post length of 0.225" (5.72 mm) — the post length determines the PCB thickness range the header can solder into reliably.
The 91276-420HLF is the 20-position, single-row, tin-plated variant in the BERGSTIK II series. The base product number 91276 covers a range of position counts and plating options. For a BOM line that needs a one-time or low-cycle interconnect, the tin contact saves money without sacrificing the 5 A rating or the 0.100" pitch footprint.