The 10120001-101LF is a 120-position right-angle header connector assembly designed for high-speed differential applications with a 4-pair configuration and 10 IMLA (Integrated Modular Line Architecture) columns. The connector features lead-free tin-over-nickel plating on press-fit tails, meeting European Union directives and lead-free regulations as described in GS-22-008. It incorporates 80 signal contacts (1.20±0.15 mm) and 40 ground contacts (1.55±0.15 mm), with a housing constructed from high-temperature thermoplastic (UL94-V0) and copper alloy contacts. The connector housing measures 33.80±0.15 mm in width with a 12.50±0.10 mm depth, and is qualified to FCI product specification GS-12-0956 including Telcordia GR-1217-CORE requirements. This connector is ideal for telecommunications, data center, and high-speed networking applications requiring reliable differential signal transmission and ground symmetry.