RUSBF Series - 16 & 6V PolySwitch Lead-Free Radial Leaded Resettable PPTC

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Disclaimer Notice

Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.

Our radial-leaded products represent the most comprehensive and complete set of PPTC products available in the industry today. RGEF series for hold currents up to 14A. RHEF series for flatter thermal derating and operating temperatures up to 125°C. RUEF series for balance of voltage rating (30V) and hold current (up to 9A). RUSBF series for fast time-to-trip and low-resistance computer applications. RXEF series for low hold currents (down to 50mA) and high voltage rating (up to 72V). RKEF series for balance of voltage rating (60V) and hold current (up to 5A). LVR series for line voltage rated applications now offering RoHS versions of all products.


  • Resettable and single-use overcurrent devices
  • Wide range of form factor and termination methods
  • Devices compatible with high-volume electronics assembly

Consumer and Industrial

  • Satellite video receivers
  • Industrial controls
  • Transformers
  • Computer motherboards
  • Modems
  • USB hubs, ports and peripherals
  • IEEE 1394 ports
  • CD-ROMs
  • Game machines
  • Battery packs
  • Phones
  • Fax machines
  • Analog and digital line cards
  • Printers

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
Trip Time
Pd Typical (watts)Product
RUSBF0750.751.3400.110.1750.230.460.3Product SpecificationCheck
RUSBF075-20.751.3400.110.1750.230.460.3Product SpecificationCheckOrder
RUSBF075-AP0.751.3400.110.1750.230.460.3Product SpecificationCheckOrder
RUSBF0900.91.8400. SpecificationCheck
RUSBF090-20.91.8400. SpecificationCheck
RUSBF1101.12.2400.050.0950.142.3160.7Product SpecificationCheck
RUSBF110-21.12.2400.050.0950.142.3160.7Product SpecificationCheck
RUSBF1201.22400.070.09750.140.560.6Product SpecificationCheckOrder
RUSBF120-21.22400.070.09750.140.560.6Product SpecificationCheck
RUSBF1351.352.7400.040.0740.1124.5160.8Product SpecificationCheck
RUSBF135-21.352.7400.040.0740.1124.5160.8Product SpecificationCheck
RUSBF135-AP1.352.7400.040.0740.1124.5160.8Product SpecificationCheck
RUSBF1551.552.65400.040.07050.12.260.6Product SpecificationCheckOrder
RUSBF155-21.552.65400.040.07050.12.260.6Product SpecificationCheck
RUSBF155-AP1.552.65400.040.07050.12.260.6Product SpecificationCheck
RUSBF1601.63.2400.030.0610.119160.9Product SpecificationCheckOrder
RUSBF160-21.63.2400.030.0610.119160.9Product SpecificationCheck
RUSBF1851.853.7400.030.0510.0910161Product SpecificationCheck
RUSBF185-21.853.7400.030.0510.0910161Product SpecificationCheck
RUSBF185-AP1.853.7400.030.0510.0910161Product SpecificationCheckOrder
RUSBF2502.55400.020.0360.0640161.2Product SpecificationCheck
RUSBF250-22.55400.020.0360.0640161.2Product SpecificationCheck