Board Layout Fit: 0.156" Pitch, 21 Positions, Right-Angle
The 2-644751-1: This is a 21-position single-row header on a 0.156" (3.96mm) pitch — the footprint takes about 3.12 inches of board edge for the full row. All 21 positions are loaded, so there are no empty cavities to manage in the BOM or on the line. The square male pins measure 0.390" (9.91mm) mating length and 0.175" (4.45mm) post length for solder-through-hole assembly.
Current and Voltage: Wire-Gauge Dependent, 600VAC Rating
The voltage rating is 600VAC, which covers most industrial control and appliance power distribution. Tin-plated mating contacts are suited for moderate-cycle applications in controlled environments.