The UN3E6-75M is a Gas Discharge Tube (GDT) manufactured by SOCAY, SMD-based and of size 8.5 x 6mm, compliant with the Restriction of Hazardous Substances (RoHS) regulations. Specifically, this GDT is built to provide protection against transient voltage surges and spikes, by discharging or clamping the voltage to a safe level.GDTs, in general, work by storing energy in a capacitive element and discharging it all at once. This is triggered when the voltage reaches a certain set point, due to a surge or spike. This part is perfect for use in power systems, industrial switching, communications, and more.