Selection Guide - Littelfuse
Circuit Protection ProductsSelection GuideA Guide to selecting the right protection components for your applications 2020 Littelfuse , Circuit Protection Technologies4 5Overcurrent Protection Solutions6Overvoltage Protection Solutions7ESD Suppression Solutions8Applications9 11Common Circuit Threats and Protection Solutions12 13Fuses14 16Fuseholders17Surface Mount PPTC Devices18 19Radial Leaded PPTC Devices19 20Battery PPTC Devices20Battery Mini-Breakers (Thermal Cutoff Devices)21Telecom PPTC Devices22Varistors23 24Gas Discharge Tubes24 26PulseGuard ESD Suppressors26TVS Diode Arrays27 29TVS Diodes29 31PLED Bypass Protectors32 33SIDACtor Protection Thyristors33 35About this guideThis Guide provides a summary of key circuit protection consideration factors, descriptions of the technologies Littelfuse offers, and product Selection tables.
Fuses Fuses have been referred to as “one time” devices, in that the fuse will provide protection from the overload by opening only once and then need to be replaced. The heart of a typical fuse is a length of wire that is heated to its melting point by the excessive current. The circuit current flow decreases to zero as the wire melts open.
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