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)Product
Partner ECAD ModelsStockSamplesCompare
RUSBF0750.751.3400.110.1750.230.40.385Product SpecificationRUSBF075CheckOrder
RUSBF075-20.751.3400.110.1750.230.40.385Product SpecificationRUSBF075-2CheckOrder
RUSBF075-AP0.751.3400.110.1750.230.40.385Product SpecificationRUSBF075-APCheckOrder
RUSBF0900.91.8400. SpecificationRUSBF090CheckOrder
RUSBF090-20.91.8400. SpecificationRUSBF090-2CheckOrder
RUSBF1101.12.2400.050.0950.142.30.785Product SpecificationRUSBF110CheckOrder
RUSBF110-21.12.2400.050.0950.142.30.785Product SpecificationRUSBF110-2CheckOrder
RUSBF1201.22400.070.09750.140.50.685Product SpecificationRUSBF120CheckOrder
RUSBF120-21.22400.070.09750.140.50.685Product SpecificationRUSBF120-2CheckOrder
RUSBF1351.352.7400.040.0740.1124.50.885Product SpecificationRUSBF135CheckOrder
RUSBF135-21.352.7400.040.0740.1124.50.885Product SpecificationRUSBF135-2CheckOrder
RUSBF135-AP1.352.7400.040.0740.1124.50.885Product SpecificationRUSBF135-APCheckOrder
RUSBF1551.552.65400.040.07050.12.20.685Product SpecificationRUSBF155CheckOrder
RUSBF155-21.552.65400.040.07050.12.20.685Product SpecificationRUSBF155-2CheckOrder
RUSBF155-AP1.552.65400.040.07050.12.20.685Product SpecificationRUSBF155-APCheckOrder
RUSBF1601.63.2400.030.0610.1190.985Product SpecificationRUSBF160CheckOrder
RUSBF160-21.63.2400.030.0610.1190.985Product SpecificationRUSBF160-2CheckOrder
RUSBF1851.853.7400.030.0510.0910185Product SpecificationRUSBF185CheckOrder
RUSBF185-21.853.7400.030.0510.0910185Product SpecificationRUSBF185-2CheckOrder
RUSBF185-AP1.853.7400.030.0510.0910185Product SpecificationRUSBF185-APCheckOrder
RUSBF2502.55400.020.0360.06401.285Product SpecificationRUSBF250CheckOrder
RUSBF250-22.55400.020.0360.06401.285Product SpecificationRUSBF250-2CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
RF3379-000 RUSBF075 RoHS No 07/04/2018 PbFree No 07/04/2018 CoC_RoHS10_RF3379-000_-RUSBF075-_07-04-2018 REACH191_Declaration_RF3379-000_08-06-2018 Yes
Does not Contain
RF3382-000 RUSBF090 RoHS No 05/04/2018 PbFree No 05/04/2018 CoC_RoHS10_RF3382-000_-RUSBF090-_05-07-2019 REACH197_Declaration_RF3382-000_-RUSBF090-_05-07-2019 Yes
Does not Contain
RF3383-000 RUSBF090-2 RoHS No 11/19/2020 PbFree No 11/19/2020 CoC_RoHS10_RF3383-000_-RUSBF090-2-_11-20-2020 Yes
RF3384-000 RUSBF110 RoHS No 03/05/2018 PbFree No 03/05/2018 CoC_RoHS10_RF3384-000_-RUSBF110-_04-24-2018 No
RF3385-000 RUSBF110-2 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3385-000_01-12-2018 No
RF3386-000 RUSBF120 RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS10_RF3386-000_-RUSBF120-_11-20-2018 REACH191_Declaration_RF3386-000_-RUSBF120-_11-20-2018 No
Does not Contain
RF3387-000 RUSBF120-2 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3387-000_01-12-2018 No
RF3388-000 RUSBF135 RoHS No 12/25/2017 PbFree No 12/25/2017 CoC_RoHS10_RF3388-000_-RUSBF135-_10-21-2019 REACH201_Declaration_RF3388-000_-RUSBF135-_10-21-2019 No
Does not Contain
RF3391-000 RUSBF155 RoHS No 06/24/2019 PbFree No 06/24/2019 CoC_RoHS10_RF3391-000_-RUSBF155-_6-25-2019 REACH197_Declaration_RF3391-000_-RUSBF155-_6-25-2019
Does not Contain
RF3394-000 RUSBF160 RoHS No 04/06/2021 PbFree No 04/06/2021 CoC_RoHS10_RF3394-000_-RUSBF160-_04-07-2021 REACH211_Declaration_RF3394-000_-RUSBF160-_04-07-2021 No
Does not Contain
RF3212-000 RUSBF185 RoHS No 06/06/2018 PbFree No 06/06/2018 CoC_RoHS10_RF3212-000_-RUSBF185-_7-27-2018 No
RF3397-000 RUSBF185-AP RoHS No 10/25/2018 PbFree No 10/25/2018 CoC_RoHS10_RF3397-000_-RUSBF185-AP-_10-25-2018 REACH191_Declaration_RF3397-000_-RUSBF185-AP-_10-25-2018 No
Does not Contain
RF3398-000 RUSBF250 RoHS No 04/23/2018 PbFree No 04/23/2018 CoC_RoHS10_RF3398-000_(RUSBF250)_06-11-2021 No
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