The 103239-3 is a single-row, 3-position breakaway header connector designed for wire-to-board applications in personal computer systems. It features 0.100 inch (2.54 mm) center spacing with unshrouded 0.025 inch (0.64 mm) square posts, and is available with multiple plating options including tin or gold finishes on copper alloy posts. The header housing is constructed from polyester material rated 94V-0, with posts plated to specifications ranging from 0.000030 inch minimum gold over nickel to tin-lead combinations depending on the plating code selected. This connector is end-to-end stackable, supports one-step assembly, and is commonly used in computer industry applications where reliable wire-to-board interconnection is required.