2-644489-2 is an MTA-100 series header designed for wire-to-board connections in printed circuit board applications. This header features straight posts with 0.025 inch (0.64 mm) square post dimensions and a 0.100 inch (2.54 mm) centerline pitch. The header is part of the TE Connectivity MTA connector family, which provides reliable insulation displacement connections. These headers are commonly used in applications requiring secure wire-to-board interconnections in consumer electronics, industrial equipment, and appliances.