What this header is
The Amphenol 87900-126HLF is the 26-position member of the BERGSTIK II dual-row board-to-board header series, operating at 0.100" (2.54 mm) pitch throughout. Rated 5 A per circuit with gold or Gold GXT contacts at 30.0 µin (0.76 µm) thickness on the mating interface, it delivers a step up in current-carrying capacity compared to many signal-grade 2.54 mm headers — placing it squarely in the crossover zone between general-purpose signal and low-level power distribution. The push-pull fastening type and unshrouded profile make it a drop-in fit for standard 0.100" pitch receptacles in the same series; the square male pin profile suits the matching IDC or crimp-style female connector in BERGSTIK II housings. Through-hole mounting with 0.120" (3.05 mm) post length and 0.940" (23.88 mm) overall contact length gives adequate wipe distance for most board-stacking or card-edge interconnects in industrial control, instrumentation, and communications equipment. The UL94 V-0 rated black polyphenylene housing and phosphor bronze contact material support the industrial operating envelope this series targets.
26 positions — what changes between the 16- and 26-circuit members
The 87900-126HLF carries 26 circuits in a 2-row dual array at the same 0.100" (2.54 mm) pitch as the rest of the series. Within the same series, circuit count is the only parameter that changes between members — pitch, row spacing, mounting footprint, current rating, and voltage rating remain identical.
What drives the fit decision
Pitch at 0.100" (2.54 mm) sets the board footprint and routing density — standard 0.100" grid is compatible with most through-hole layout tools and legacy PCB processes. The 5 A per-contact current rating governs power-distribution duty; the gold plating at 30.0 µin (0.76 µm) on the mating face supports repeated mating cycles better than thin tin, making this suitable for field-replaceable card or module interconnects. The unshrouded, push-pull configuration is not keyed — mis-mate protection depends entirely on the receptacle housing and the system-level alignment features. For sealed or vibration-heavy environments, confirm the mating half carries adequate retention force; the push-pull latch is designed for easy disconnect, not high-shock retention. The 110 V rating sets the voltage ceiling for the circuit; derate per your application's altitude and spacing rules if operating near that limit.