The kinked pin solder termination anchors the header during wave soldering, reducing skew from thermal stress.
The 2.50 mm pitch is standard for Economy Power 2.5 receptacles — the board footprint requires 0.098" hole spacing, and the mating half must match this pitch exactly. The 4.2 A rating is continuous at 25 °C ambient; derate above that per the housing material curve. For higher cycle life, consider gold-plated alternatives in the same series. The 250 VAC voltage rating is suitable for general-purpose industrial control and lighting circuits.