The 3-1761603-7 is a vertical header assembly connector designed for printed circuit board (PCB) applications. It features 31 contact positions with phosphor bronze posts and a PBT housing material rated UL94V-O in blue color. The posts are finished with a minimum of 0.00076 mm gold on the mating area, 0.00254 mm tin on the solder end, and 0.00127 mm nickel overall. The connector is configured with 0.100 inch (2.54 mm) center-to-center spacing between contacts and includes position indicators for proper alignment during assembly. This header assembly is commonly used in industrial control systems, telecommunications equipment, and general-purpose PCB interconnection applications where reliable vertical mounting and consistent contact spacing are required.