What this connector is
The Amphenol FCI 86503-158HLF is the 58-circuit member of the BERGSTIK II unshrouded pin-header series. It is a dual-row board-to-board header with 0.100" (2.54 mm) pitch and square male pins intended to mate with the matching BERGSTIK II receptacle housing. The 5 A per circuit rating at 110 V places it in the mid-power range for 2.54 mm pitch headers — above signal-duty parts and into wire-to-board or low-level power routing where the circuit count and plating grade together determine fit. Contacts are phosphor bronze with a 30.0 µin (0.76 µm) gold or Gold GXT plating on the mating side — the thicker gold grade extends mating cycle life compared to tin-plated alternatives, which matters for any application requiring repeated mate/de-mate. All 58 positions are loaded. The housing is black glass-filled nylon rated UL94 V-0, and the insulation height is 0.100" (2.54 mm) — the same as the pitch, which is the standard for this series footprint.
Board fit and termination
The 86503-158HLF terminates via through-hole solder with a post length of 0.120" (3.05 mm) and an overall contact length of 0.470" (11.94 mm). That overall length is the dimension to check against your board stack-up — the mated pin projection must clear the board side you are populating and leave sufficient clearance for the receptacle housing on the mating board. The push-pull fastening type means the header relies on the interference fit of the pin in the receptacle contact for retention — there is no external latch, so the mated pair is held by contact normal force alone. For high-vibration environments, verify whether the receptacle housing includes a positive-lock feature to supplement the push-pull fit.
Sourcing and lifecycle
Match to the corresponding BERGSTIK II receptacle with the same 58-position dual-row footprint and 0.100" row spacing. The unshrouded header design means visual keying relies on the housing geometry — verify the polarizing ribs or keying features on the mating receptacle.