What this connector is
The Amphenol 93939-138HLF is the 38-circuit member of the BERGSTIK II dual-row board-to-board header series — a 0.100" (2.54 mm) pitch, right-angle through-hole male pin header rated 5 A per circuit at 110 V.
Key features
Dual-row with all 38 positions loaded. Mating contacts carry 30.0µin (0.76µm) gold or Gold GXT plating on a phosphor bronze base; the solder-side post finish is tin. The push-pull fastening type provides positive retention over a friction-fit header — meaningful in industrial or instrumentation environments where vibration is a concern. Housing is UL94 V-0 rated.
Board layout and termination
Right-angle through-hole mount — the post extends 0.120" below the board surface and the mated contact length is 0.160" on the mating side. Insulation height sits at 0.190" above the board face.
Applications and environments
Board-to-board signal and low-power interconnect in industrial automation and instrumentation — the 5 A per circuit rating covers signal-level and low-power DC duties; at 110 V it is not positioned for primary power distribution. The push-pull retention and UL94 V-0 housing make it suited for enclosed equipment where vibration or thermal cycling is a factor.
What the ratings mean for selection
At 5 A per circuit with gold-over-nickel mating contacts (30.0µin) and tin tails, the limiting factor for current is the contact plating grade on the solder side, not the mating interface — the gold flash on the mating face supports repeated mate/unmate cycles; the tin post is designed for a permanent solder joint. The 110 V rating constrains this to signal and low-voltage DC paths, not distribution bus work. The 38 positions at 0.100" pitch give a centre-to-centre span based on the position count — verify board clearances and keep-out for the right-angle bend radius before layout.