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Littelfuse Inc. an industrial technology manufacturing company empowering a sustainable connected and safer world announced today the launch of a surge protective device SPD selection guide that sizes SPDs to achieve the best level of protection for a system based on specifications provided.Surge protective devices need to be sized correctly. If they are sized too low the system could be susceptible to temporary overvoltages as well as cause a decrease in the life expectancy of the SPD. If they are sized too high it could damage the equipment.This easy-to-use selection guide offers customers an interactive calculator that quickly provides the right SPD size to maximize surge protection for their systems said Debra Jayson Senior Marketing Manager Littelfuse Industrial Business. When specifications are entered the guide computes the best configuration based on parameters provided and gives information on the recommended SPD product with links to the data sheet and other technical resources.The Surge Protective Device Selection Guide will determine the optimal maximum continuous operating voltage MCOV size for your specific system from variables includingLine-to-line voltageNumber of conductorsGrounded or ungroundedIf there is a neutralIf the SPD is going to be installedIf remote indication is required