It uses a 0.100" (2.54mm) pitch on both rows and contacts, with a row spacing of 0.100" (2.54mm) — a standard footprint for prototyping and production board-to-board interconnects. All 64 positions are loaded, so the circuit count matches the position count exactly.
The 110 V rating is the working voltage between adjacent pins; for higher-voltage applications, the 0.100" pitch provides enough creepage for most low-voltage DC bus work below 60 V. The GXT finish is a palladium-nickel underplate with a gold flash, offering comparable corrosion resistance and wear life to straight gold at a lower cost. The UL94 V-0 rated black insulation housing (0.100" / 2.54mm insulation height) means the header can be used inside equipment enclosures where a flame-retardant rating is required by safety standards. The overall contact length of 0.410" (10.41mm) breaks down as 0.190" (4.83mm) mating length and 0.120" (3.05mm) solder post — the post length is short enough for single-sided boards but may not fully protrude through thick multilayer PCBs.
Mating and Board Layout
As an unshrouded header, the 79425-164HLF mates with any standard 0.100" pitch dual-row female socket or IDC receptacle that accepts 0.025" square pins. The 64-position count and 0.100" row spacing are common across the BERGSTIK II and many other industry-standard header families, so finding a mating half is straightforward.