nanoSMD400LR-C-2 - LoRho SMD Series

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The Littelfuse LoRho SMD PTC for Charging Cables provides protection from heat generated due to faults within the connector such as USB-C, microUSB, and many others. As connectors get smaller, their pin-to-pin spacings are shrinking which increases the opportunity for debris such as dust, dirt, or water to collect causing a fault.  These faults can generate a tremendous amount of heat which will damage charging cables, the devices they charge, or people using them.


  • SMD compatible with reflow soldering process
  • Available in small 1206 and 1210 sizes
  • Up to 21Vdc and 4.5A Ihold
  • Ultra-low internal resistance
  • Reset automatically


  • Overtemperature (OT) protection for USB connectors and cables including USB Type-C, USB Micro-B and USB-A
  • Fast charging standards and protocols

pdf icon Resettable PTC LoRho Datasheet

Littelfuse LoRho™ Surface Mount PPTC (Polymer Positive Temperature Coefficient) devices provide overcurrent protection for applications where ultra low internal resistance...

pdf icon Product Selection Guide

Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdf icon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive, industrial, handheld, computer and telecom markets...