The 3 A per-contact rating is the continuous current limit at room temperature; derate above 105 °C per the series derating curve. The 125 V voltage rating applies between adjacent circuits — for higher voltage isolation, check the creepage distance in the product drawing. Gold-on-gold mating interface (15.0 µin gold on the header, matching receptacle gold plating) gives consistent contact resistance over hundreds of cycles. Tin-plated posts (78.7 µin) solder cleanly with standard lead-free profiles.
The shrouded 4-wall housing accepts the receptacle's detent lock feature for a positive-latch connection.