The Schaffner CDN-125 Capacitive Coupling Clamp can be used to apply high voltage fast transients to data lines or signal cable. It can be used with ribbon cables and round cables up to 40mm in diameter and has an active length of 1m. Coupling capacitance will depend on the cross section and the material of the cable, but is typically around 100pF. The coupling clamp is primarily used to inject interference pulses into signal and data cables.