What it is
The 1720430302: The locking ramp on the housing side couples with the board-lock feature here to resist vibration pull-out — the board lock stakes into the PCB hole on insertion and stays put through service cycles without a separate fastener. Silver contact plating at 100.0 µin (2.54 µm) is notably thicker than the gold-flash or standard tin grades common on signal headers — the thickness matters because it translates to lower contact resistance at high current and better survivability under frequent reconnect, which is exactly what a 30 A power header sees in the field. Finger-proof shroud geometry on the male blades protects service personnel from arc-capable contacts at full line voltage during live working — the insulator is black liquid crystal polymer, glass-filled, rated to 125 °C operating temperature.