This document summarizes a transient voltage surge suppressor device. It can provide high to low level protection for service entrances, feeders, main panels, sub panels, and distribution panels against externally and internally generated transients such as lightning surges or power fluctuations. The device has a peak surge current capacity of 60kA per phase and can protect 3-phase watt and delta systems at voltages ranging from 200-480 volts. It features an active tracking filter, bidirectional clamping capability, and low impedance hybrid circuit design to suppress voltage surges and transients.