1-87227-0 is a 20-position double row vertical header from the AMPMODU .025 [0.64] Square Interconnection System. This header features a 0.100 inch [2.54 mm] centerline pitch with square post contacts measuring 0.025 inch [0.64 mm]. The header has overall dimensions of 0.984 inches [24.99 mm] for dimension A and 0.900 inches [22.86 mm] for dimension B. This RoHS compliant component is designed for through-hole PCB mounting and is commonly used in board-to-board interconnection applications where reliable signal transmission is required.