What this connector is and where it fits
The Amphenol 87900-134HLF is the 34-circuit member of the BERGSTIK II unshrouded header series, configured as a dual-row 0.100 inch (2.54 mm) pitch male pin header rated 5 A per contact at 110 V. Through-hole solder termination and push-pull fastening make it a board-to-board stacking interconnect rather than a wire-interface part — it mates with the matching dual-row BERGSTIK II receptacle housing and carries UL94 V-0 rated black nylon housing material for flame-retardant industrial applications (K: board-to-board).
Contact plating and what the 5 A rating means in practice
The mating contact finish is 30 microin (0.76 µm) gold or Gold GXT over the full 34-position array, applied to a square phosphor bronze contact. At 5 A per circuit this header can carry low-level power on a few circuits within a 34-position board-to-board stack — the limiting factor is not the contact rating itself but the thermal budget of the board and the housing material at the ambient. The gold thickness is appropriate for multiple mating cycles in an industrial setting; tin-plated variants of this series exist for higher-volume consumer mating where cycle life is less critical.
Footprint and stacking geometry for the board-layout engineer
The 34 positions span two rows at 0.100 inch row spacing; the insulation height of 0.100 inch (2.54 mm) sets the mated stack profile. The post extends 0.120 inch (3.05 mm) below the housing shoulder, giving adequate solder fillet height for through-hole inspection. All 34 positions are populated — no partial-load option on this specific order code. The unshrouded header offers no polarisation key built into the housing shoulder, so board-level keying or connector placement must be managed at the layout stage to prevent mis-mating in multi-connector assemblies.
Sourcing — Active production and the BOM check
Listed Active with no official LTB or successor. The base product number 87900 anchors the series, so BOM buyers confirming a 34-position BERGSTIK II dual-row header at 2.54 mm pitch have the match. Confirm the mating receptacle housing order code from the same series before committing to the BOM line — unshrouded headers require the matching housing to complete the interconnect. Quoted to order against the BOM quantity.