Power Header for High-Current Board-to-Wire Connections
The silver plating handles the current density without the contact resistance rise you'd see with tin at these levels, though it's not rated for frequent mate cycles — this is a connector for a semi-permanent harness, not a daily-disconnect point.
Board Lock and Locking Ramp — Retention for Vibration
Together they keep the power connection closed under the vibration you'd see in an industrial cabinet or an off-road vehicle harness.
The glass-filled LCP housing handles -40°C to 125°C, which covers under-hood automotive, outdoor telecom cabinets, and industrial enclosures near heat sources. The 125°C upper limit is the operating ceiling — the 30 A rating holds up to that temperature, but you'll derate above it per the manufacturer's curve.
The 1720420302 is the 3-position member of the Super Sabre 172042 series. The 2-position sibling, 1720420301, shares the same 7.50 mm pitch, 30 A per circuit rating, silver plating, board lock, and locking ramp.
No official cross-reference or replacement is recorded; the 172042 series is the current-generation power header family from Molex.