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FuseSelectionGuideTECHNICAL PAPER
Fuse Selection Guide: Raychem Surface Mount Chip Fuses
Selecting Raychem Surface Mount Chip Fuses
Fuse selection seems straightforward in that you pick one which has a current rating just a bit higher than your worstcase system operating current. Unfortunately, it’s not that simple. There are derating considerations for operating current and application temperature. Turn-on and other system operations (like processor speed changes or motor start up) cause current surges or spikes that also require consideration when selecting a fuse. So selecting the right fuse for your application is not as simple as knowing the nominal current drawn by the system. However, by following the guideline presented in this paper, selecting the proper fuse does become a straightforward proces
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