This document summarizes a transient voltage surge suppressor (TVSS) device called the ProSine PSP 160. It provides high to low exposure level protection for sensitive electrical equipment from externally and internally generated transients. The PSP 160 has a peak surge current capacity of 160kA per phase and protects system voltages from 200/220/240V to 400/440/480V. It features threshold tracking filter technology, bidirectional clamping capability, and low impedance hybrid circuit design to suppress voltage surges and protect connected equipment.