Coaxial D-Sub Connectors HARTING Coaxial D-Sub Connectors are available in two variants: inner conductor soldered and outer part crimped (solder / crimp termination), as well as inner and outer part crimped (crimp / crimp termination). The crimp / crimp version is recommended for medium to large volumes because crimping is faster than soldering. The series offers a 2A working current, 750V / 50Hz test voltage, and ≤10mΩ contact resistance. HARTING Coaxial D-Sub Connectors operate in a 0 to 2GHz frequency range and -55°C to +135°C temperature range.