Version 3


    Circuit Protection II:

    PCB-Mounted Fuses

    Sponsored by


    Fuses are current-sensitive devices designed to serve as the intentional weak link in an electrical or electronic circuit, by providing reliable protection for those circuits or discrete components under overcurrent or overload conditions. A variety of fuse types have been designed for printed circuit board mounting. The main types of PCB-mount fuses are through-hole, surface-mounted and resettable PCB fuses. Understanding the differences in performance between these types of fuses is important in order to choose the right device for the application.

    Go to Circuit Protection II Learning Module

    Parts Used within the Module

    Through-Hole PCB Fuses
    473 Series, PICO® II Slo-Blo® FusePICO® 259-UL913 Series Intrinsically Safe Fuse
    Surface-Mounted PCB Fuses
    467 Series Fast-Acting Surface Mount Fuse437 Series - High Temperature Fast-Acting Fuse
    Resettable PCB Fuses
    PolySwitch RXEF Series PPTC Resettable FusePOLYFUSE LoRho Series PPTC Resettable Fuse

    *Trademark. Littelfuse® is a trademark of Littelfuse, Inc. Other logos, product and/or company names may be trademarks of their respective owners.