The 5100141-1 is a 2mm Hard Metric PCB mount connector assembly designed for board-to-board interconnection applications. It features a Type B, 25-column plug configuration with 5 rows and 125 total positions, mounted vertically on the PCB with a module length of 50.00 mm. The connector utilizes press-fit contact technology with phosphor bronze base material and tin over nickel termination end plating, conforming to IEC 61076-4-101 Performance Level 2 specifications. The housing is constructed from polyester GF material with UL 94 V-0 flammability rating, and the assembly is RoHS/ELV compliant. This connector is ideal for high-density backplane and midplane applications requiring reliable signal distribution and mechanical stability.