力特保险丝设计指南.pdfVIP

ELECTRONIC DESIGNER’S GUIDE Resettable PTCs Fuses PulseGuard® Polymeric ESD Suppressors Metal Oxide Varistors TVS Diodes Greentube™ Gas Plasma Arresters (Improved GDTs) Introduction to Circuit Protection Fuseology Fuse Facts The application guidelines and product data in this guide are intended to provide technical information that will help with application design. Since these are only a few of the contributing parameters, application testing is strongly recommended and should be used to verify performance in the circuit/application. In the absence of special requirements, Littelfuse reserves the right to make appropriate changes in design, process, and manufacturing location without notice. The purpose of the Fuseology Section is to promote a better understanding of both fuses and common application details. The fuses to be considered are current sensitive devices which are designed as the intentional weak link in the electrical circuit. The function of the fuse is to provide protection of discrete components, or of complete circuits, by reliably melting under current overload conditions. This fuseology section will cover some important facts about fuses, selection considerations, and standards. FUSE FACTS The following fuse parameters or application concepts should be well The fuses in this catalog range in size from the approx. 0402 chip size understood in order to properly select a fuse for a given application. (.041L x .020W x .012H) up to the 5 AG, also commonly known as AMBIENT TEMPERATURE: Refers to the temperature of the air a“MIDGET” fuse (13/32 Dia. x 11/2 Length). As new products were immediately surrounding the fuse and is not to be confused with “room developed throughout the years, fuse sizes evolved to fill the various temperature.”