Low capacitance options (as low as 0.3pF) are offered for use as ESD surge protection devices in automotive systems and high speed signal lines, such as USB 2.0. This slide shows how minimization of the inter-pin capacitance results in excellent signal transmission. When the signal waveforms are rounded, communication is deteriorated. ROHM's low capacitance Zener characteristics create signal waveforms that resist rounding.