What it is
The Amphenol FCI BERGSTIK 93690-105-50LF is a 50-position, dual-row male header rated 5 A per circuit at 110 V, designed for board-to-board or cable interconnect applications. Square pins on a 0.100" (2.54mm) pitch with 0.100" row spacing make it a standard footprint for through-hole reflow or wave-solder assembly. The 25-position-per-row layout supports dense signal routing or power distribution depending on the circuit duty. The breakaway header construction means individual pin groups can be separated if the board layout calls for a smaller block — useful when the full 50 positions are not all populated. The push-pull fastening type is standard for unshrouded headers; it relies on the pin-to-socket interference fit rather than a locking tab, so verify the retention requirement for the target application before committing.
Plating split and what it means
The contact plating is split across the two functional zones: the mating interface carries Gold GXT at 30.0 µin (0.76 µm) while the solder tail is tin-plated at 39.4 µin (1.00 µm). The gold-on-mating delivers the low contact resistance and repeat-mate durability the interface needs; the heavier tin on the post side promotes reliable solder wetting and inhibits whisker growth on the through-hole leg. The 30 µin gold thickness sits at the upper end of the durable range — enough for a meaningful mating-cycle life in industrial environments where the header sees periodic reconnects. Plating grade is the primary lever for cycle-life expectations on this series; a lower gold thickness variant in the same family would be the first call if the application only needs a permanent install with no reconnect.
Typical environments
Board-to-board stacking, parallel mezzanine, and cable-to-board harness junctions are the natural homes for this header type. The 0.100" pitch and dual-row layout map directly to standard 0.100" pitch receptacle housings and ribbon-cable IDC punchdown blocks. The black thermoplastic body carries a UL94 V-0 flammability rating, which satisfies the base material requirement for many industrial control and instrumentation enclosures. The unshrouded pin field does not provide keying protection against mis-mating — if the application is safety-critical or requires a single-mate guarantee, confirm whether a shrouded variant or polarizing key in the mating housing addresses that risk. The insulation height of 0.100" (2.54mm) sets the installed stack height for board-to-board mating, so check the z-height budget against the companion receptacle before layout.