What this connector is
The Amphenol 86503-470HLF is the 70-circuit member of the BERGSTIK II series — a dual-row 0.100-inch pitch male pin header rated 5 A per contact at 110 V, designed for board-to-board stacking or as a wire-harnessicepigtail termination point in industrial and instrumentation applications. The housing is unshrouded and the square male pins are phosphor bronze with 2.54 µm tin plating on both the mating face and the solder-tail post end — the same heavy plating grade on both surfaces means this is built for multiple mate/de-mate cycles rather than a single permanent installation. Insulation height matches the 0.100-inch row pitch, so the header sits flush with the board surface when fully inserted — the board standoff is controlled by the insulation flange, not a separate post. Fastening is push-pull: the square pin geometry provides sufficient friction for most board-to-board stacking configurations; no separate locking clip is required at this pitch and position count.
Ratings that drive the selection
Pitch is 0.100 inch (2.54 mm) — the industry-standard header density, which means compatible receptacle housings from Amphenol and most competing 2.54 mm pitch IDC or crimp families will mate with it; routing density is tight but well understood in layout tools. 70 positions in a dual-row layout pushes toward the upper end of single-piece BERGSTIK II availability; verify the board footprint accommodates the full 2.54 mm row spacing before committing. Contact current is rated 5 A per circuit with tin plating throughout — the limiting factor for power duty is the contact beam cross-section, not the plating grade. Voltage rating is 110 V — adequate for logic-level and instrument-bus signal, but below the threshold for primary AC power distribution. The UL94 V-0 housing rating confirms self-extinguishing performance under fault conditions — the material will not sustain flame propagation, which is required in most industrial control enclosures and instrumentation panels.
Sourcing and lifecycle
Mating and termination
Termination is through-hole solder with a 0.120-inch post length (3.05 mm); verify the drill diameter and paste mask match the 0.100-inch row pitch to avoid tombstoning on the outer pins. Mating length is 0.250 inch (6.35 mm) — the pin must be fully seated in the receptacle before the housing flange contacts the board; the 0.100-inch insulation height sets the minimum standoff from the PCB surface. All 70 positions are loaded — no partial-load option on this part number, which means the full circuit count is always populated; confirm the system only needs 70 circuits and does not require a dead-circuit placeholder row for future expansion.