Contact plating and current duty
The 1720420402: Silver plating at 100 microinches (2.54 micrometres) is unusually thick for a power connector in this class — the plating budget gives the contact surface the conductivity and corrosion margin needed for sustained 30 A per circuit without the thermal runway ceiling governing the choice first. The contact material is copper. The housing is liquid crystal polymer glass-filled, rated -40°C to 125°C, which keeps the insulation glass transition well above typical panel or enclosed-equipment operating temperatures.
Board-lock finger-proof design
The board-lock feature stakes the header to the PCB during reflow without a separate SMT peg — layout engineers use this when the 30 A current path means the connector sees mechanical load at the solder joint every mating cycle. The finger-proof shroud means the live blade tips are inaccessible after soldering, which satisfies touch-safety requirements in end-equipment that requires personnel protection at the board edge. The locking ramp on the housing is the primary mating latch — it holds the pair under vibration once the receptacle seats.