What this header is
The FCI (Amphenol) 57102-S08-25LF is the 50-circuit member of the Minitek® 2.00mm board-to-board header series — a dual-row, push-pull unshrouded male pin header sized for through-hole solder mounting on a 0.079" (2.00mm) pitch grid. The series uses a square-pin contact with 0.157" (4.00mm) of pin engagement length on the mating side and 0.118" (3.00mm) of tail protrusion for hole-fill solder. All 50 positions are loaded.
Plating split: what drives cycle life
The contact finish splits across the two interfaces: the mating side carries gold GXT™ at 15.0 µin (0.38 µm) over copper alloy, which is the durability driver — the gold grade supports re-mating cycles without the tin-fretting risk that kills low-plating contacts in field-service scenarios. The solder tails are tin-plated at 78.7 µin (2.00 µm), which gives strong solder-wetting performance without wasting gold on a zone that sees no mating stress. The UL94 V-0 thermoplastic housing means the connector passes the most common flame-retardance floor for industrial and telecom equipment boards.
Ratings and what they mean for selection
At 2 A per circuit and 200 V (AC/DC), this header covers the signal/low-power range. The push-pull friction-lock has no screw or latch; confirm your vibration profile matches the header retention force before board assembly. The 0.335" overall contact length sets the mated stack height budget.
What it mates with
This is the male pin header — it mates with the corresponding Minitek® 2.00mm female receptacle housing in the same series. The 50-position dual-row footprint and 0.079" (2.00mm) row spacing must match the receptacle's pin assignment exactly; confirm pin-1 orientation and keying polarity before committing to the board layout.