What this connector is
The Amphenol 66953-033LF is a 66-position dual-row board-to-board receptacle from the Dubox™/BergCon® PV™ series — a 0.100-inch (2.54 mm) pitch square-socket header designed for through-hole board stacking. Push-pull fastening keeps the mated pair secure without hardware. The housing is glass-filled polyester rated UL94 V-0, and the dual-beam female contact accepts the corresponding pin header in a vertical configuration. Applications span automotive, industrial, medical, and telecommunications board-level interconnects — any environment where a controlled-profile board stack must survive thermal cycling and vibration without the expense of a hardened circular. The 1250 V rating is well above typical 2.54 mm pitch board-to-board headers, which puts this connector into medium-voltage signal or power-bus territory rather than pure logic-level routing.
Key ratings and what they mean
Contact plating splits the duty: 30.0 µin (0.76 µm) gold on the mating face resists fretting and氧化 for the lifecycle the connector will see in the field, while 100.0 µin (2.54 µm) tin on the solder tail gives a robust solder-wet interface that handles through-hole wave or hand assembly without thin-spot voids. The 0.138-inch (3.50 mm) tail length is standard for this pitch class and suits reflow-capable through-hole board stacks.