Welcome to the Eaton training module Selecting Fuses – Simple Procedures for Proper Overcurrent Protection of DC-DC Converters. This module introduces fuses in power converter applications, however it could be used for any other applications. It begins with a brief explanation on how fuses work and describes the primary overcurrent threats to your circuit that Eaton fuses can offer protection against. Although this module explains how to select the proper fuse for a DC-DC converter, many aspects of AC-DC fuses are also covered during the fuse selection process.