What This Connector Is
The Amphenol FCI 87901-428HLF is the 28-circuit member of the BERGSTIK II unshrouded dual-row header series, board-to-board style, designed for through-hole solder termination on 2.54mm (0.100-inch) pitch. Phosphor bronze contacts carry a 5A per-circuit rating at 110V with 100µin (2.54µm) tin plating on the mating interface and an identical post finish, giving the contact wipe and retention character typical of tin-plated board-level headers in industrial and instrumentation applications. The push-pull fastening type refers to the friction-latch engagement of the mating receptacle — no tool actuation required. All 28 positions are loaded; the insulation body is black polyphenylene sulfide or equivalent high-temperature resin rated UL94 V-0.
Where It Is Used
BERGSTIK II unshrouded headers are a long-run industrial and instrumentation standard — board-to-board stacking in PLCs, test equipment, motor drives, and industrial automation modules where the interconnect is typically mated once during assembly and left in place. The unshrouded design means mis-mate protection depends entirely on the receptacle keying and the board layout — choose a keyed receptacle housing or polarization slot if accidental cross-insertion is a concern in the application. The UL94 V-0 flammability rating satisfies most industrial panel and equipment enclosure requirements; confirm against any application-specific flame-retardant standard if used in transportation or infrastructure equipment.
Sourcing and Lifecycle
The 87901-428HLF is listed Active — quoted to order against BOM quantity. No official successor or cross-reference has been identified for this part number; if sourcing a replacement or second-source, the BERGSTIK II series base number 87901 identifies the family and the position count 28 is the primary differentiator within it. Confirm the mating half before committing: an unshrouded header mates with a matching unshrouded or shrouded receptacle in the same series and position count.