The Amphenol FCI BERGSTIK II 79425-456HLF is a 56-position dual-row unshrouded male header on a standard 0.100" (2.54 mm) pitch, with matching row spacing.
The 0.100" pitch and row spacing are the industry-standard 0.025" square pin grid — the same footprint used by legacy BergStik, Samtec TSW, and 3M pin header families. The 0.190" (4.83 mm) mating pin length and 0.120" (3.05 mm) solder tail length give a typical mated stack height of about 0.500" (12.7 mm) when paired with a standard 0.100" receptacle housing.
Contact finish and duty
Tin plating on both the mating surface and the solder tail, with a mating-side thickness of 100.0 µin (2.54 µm), is a cost-effective choice for moderate mating cycles — typically 50 to 100 cycles — in non-corrosive, indoor environments.