Littelfuse Low Rho SMD PPTCs

Littelfuse Low Rho SMD PPTCs provide ultra-low normal operating resistance at normal operating hold current. Featuring a compact design, these fuses offer fast response times to fault currents with a maximum fault current rating of 40A. Littelfuse Low Rho SMD PPTCs are compatible with high-temperature solders and are available in a range of hold current ratings. These TUV- and UL-certified fuses are well-suited for USB peripherals including USB 3.0/2.0 ports, Li-ion/Li-Polymer battery packs, smartphones, tablet/notebook PCs, e-readers, LCD/LED HDTV, hard disk drives, digital/video cameras, computer peripherals, and game consoles.


Littelfuse Low Rho SMD PPTCs


  • Ultra-low internal resistance
  • Very thin profile
  • Miniature size saves board space
  • Fast response to fault currents
  • Compatible with high-temperature solders
  • Allows a higher hold current device in a smaller factor and lower profile as compared to a standard PPTC
  • Broad range of hold current ratings (100mA to 9A)
  • RoHS compliant, lead free, and halogen free
  • UL recognized and TUV approved


  • USB peripherals including USB 3.0/2.0 ports
  • Li-ion/Li-Polymer battery packs
  • Smartphones
  • Tablets and notebook PCs
  • E-readers
  • Hard disk drives
  • Digital and video cameras
  • Computer peripherals
  • Game consoles

Package Outline

Mechanical Drawing - Littelfuse Low Rho SMD PPTCs
Published: 2011-11-15 | Updated: 2023-06-05