SPD - Selection Guide image

Surge Protective Device Selection Guide

Surge protective devices (SPDs) need to be sized correctly. If they are sized too low, the system could be susceptible to

Surge Protective Device Selection Guide - Littelfuse

Calculate an Optimal MCOV Size for Your System

To determine the right SPD size for the system, you must know the reference to ground as well as the type of voltage that is present. The formula to use depends on the type of system.