1-5177983-4 is a 100-position PCB mount receptacle designed for vertical board-to-board connections in parallel configuration. It features a 0.8 mm centerline pitch with gold-plated contact mating areas and tin-plated PCB termination areas, supporting surface mount assembly. The connector operates at up to 100 VAC with a maximum contact current rating of 0.5 A and functions across a wide temperature range of -40°C to +125°C. With a connector height of 5 mm and stackable design supporting multiple stack heights (5 mm, 6 mm, 7 mm, 8 mm), it offers flexible integration options. This receptacle is ideal for signal applications in compact electronic assemblies requiring reliable board-to-board interconnections, and is compliant with EU RoHS and UL 94V-0 flammability standards.