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. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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)Max Operating Temp (°C)Packaging
RUSBF0750.751.3400.110.1750.230.460.385BagProduct SpecificationCheck
RUSBF075-20.751.3400.110.1750.230.460.385Tape & ReelProduct SpecificationCheckOrder
RUSBF075-AP0.751.3400.110.1750.230.460.385Ammo PackProduct SpecificationCheckOrder
RUSBF0900.91.8400.|BulkProduct SpecificationCheck
RUSBF090-20.91.8400. & ReelProduct SpecificationCheck
RUSBF1101.12.2400.050.0950.142.3160.785Loose Piece|BagProduct SpecificationCheck
RUSBF110-21.12.2400.050.0950.142.3160.785Tape & ReelProduct SpecificationCheck
RUSBF1201.22400.070.09750.140.560.685BagProduct SpecificationCheckOrder
RUSBF120-21.22400.070.09750.140.560.685Tape & ReelProduct SpecificationCheck
RUSBF1351.352.7400.040.0740.1124.5160.885BagProduct SpecificationCheck
RUSBF135-21.352.7400.040.0740.1124.5160.885Tape & ReelProduct SpecificationCheck
RUSBF135-AP1.352.7400.040.0740.1124.5160.885Ammo PackProduct SpecificationCheck
RUSBF1551.552.65400.040.07050.12.260.685Bag|BulkProduct SpecificationCheckOrder
RUSBF155-21.552.65400.040.07050.12.260.685Tape & ReelProduct SpecificationCheck
RUSBF155-AP1.552.65400.040.07050.12.260.685Ammo PackProduct SpecificationCheck
RUSBF1601.63.2400.030.0610.119160.985Bag|BulkProduct SpecificationCheckOrder
RUSBF160-21.63.2400.030.0610.119160.985Tape & ReelProduct SpecificationCheck
RUSBF1851.853.7400.030.0510.091016185BagProduct SpecificationCheck
RUSBF185-21.853.7400.030.0510.091016185Tape & ReelProduct SpecificationCheck
RUSBF185-AP1.853.7400.030.0510.091016185Ammo PackProduct SpecificationCheckOrder
RUSBF2502.55400.020.0360.0640161.285BagProduct SpecificationCheck
RUSBF250-22.55400.020.0360.0640161.285Tape & ReelProduct SpecificationCheck
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
RF3379-000 RoHS No 07/04/2018 PbFree No 07/04/2018 REACH191_Declaration_RF3379-000_08-06-2018 Yes
Does not Contain
RF3382-000 RoHS No 05/04/2018 PbFree No 05/04/2018 Yes
RF3383-000 RoHS No 11/19/2020 PbFree No 11/19/2020 Yes
RF3384-000 RoHS No 03/05/2018 PbFree No 03/05/2018 No
RF3385-000 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3385-000_01-12-2018 No
RF3386-000 RoHS No 01/22/2017 PbFree No 01/22/2017 No
RF3387-000 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3387-000_01-12-2018 No
RF3388-000 RoHS No 12/25/2017 PbFree No 12/25/2017 No
RF3391-000 RoHS No 06/24/2019 PbFree No 06/24/2019
RF3212-000 RoHS No 06/06/2018 PbFree No 06/06/2018 No
RF3397-000 RoHS No 10/25/2018 PbFree No 10/25/2018 No
RF3398-000 RoHS No 04/23/2018 PbFree No 04/23/2018 No
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