U.FL SMD Jack TE Connectivity / Linx Technologie U.FL SMD Jack is a surface mount RF/Coaxial connector compatible with IPEX MHF, MHFII, and Hirose U.FL. The jack is housed in UL94-0 rated white Liquid Crystal Polymer (LCP) and has gold plated brass contacts. Link Technologies U.FL SMD Jack has a 50Ω impedance, 0-6GHz frequency, and operating temperature of -40°C to +90°C.