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
Max Operating Temp (°C)Pd Typical (watts)Product
Partner ECAD ModelsStockSamplesCompare
RUSBF0750.751.3400.110.1750.230.4850.3Product SpecificationRUSBF075CheckOrder
RUSBF075-20.751.3400.110.1750.230.4850.3Product SpecificationRUSBF075-2CheckOrder
RUSBF075-AP0.751.3400.110.1750.230.4850.3Product SpecificationRUSBF075-APCheckOrder
RUSBF0900.91.8400. SpecificationRUSBF090CheckOrder
RUSBF090-20.91.8400. SpecificationRUSBF090-2CheckOrder
RUSBF1101.12.2400.050.0950.142.3850.7Product SpecificationRUSBF110CheckOrder
RUSBF110-21.12.2400.050.0950.142.3850.7Product SpecificationRUSBF110-2CheckOrder
RUSBF1201.22400.070.09750.140.5850.6Product SpecificationRUSBF120CheckOrder
RUSBF120-21.22400.070.09750.140.5850.6Product SpecificationRUSBF120-2CheckOrder
RUSBF1351.352.7400.040.0740.1124.5850.8Product SpecificationRUSBF135CheckOrder
RUSBF135-21.352.7400.040.0740.1124.5850.8Product SpecificationRUSBF135-2CheckOrder
RUSBF135-AP1.352.7400.040.0740.1124.5850.8Product SpecificationRUSBF135-APCheckOrder
RUSBF1551.552.65400.040.07050.12.2850.6Product SpecificationRUSBF155CheckOrder
RUSBF155-21.552.65400.040.07050.12.2850.6Product SpecificationRUSBF155-2CheckOrder
RUSBF155-AP1.552.65400.040.07050.12.2850.6Product SpecificationRUSBF155-APCheckOrder
RUSBF1601.63.2400.030.0610.119850.9Product SpecificationRUSBF160CheckOrder
RUSBF160-21.63.2400.030.0610.119850.9Product SpecificationRUSBF160-2CheckOrder
RUSBF1851.853.7400.030.0510.0910851Product SpecificationRUSBF185CheckOrder
RUSBF185-21.853.7400.030.0510.0910851Product SpecificationRUSBF185-2CheckOrder
RUSBF185-AP1.853.7400.030.0510.0910851Product SpecificationRUSBF185-APCheckOrder
RUSBF2502.55400.020.0360.0640851.2Product SpecificationRUSBF250CheckOrder
RUSBF250-22.55400.020.0360.0640851.2Product SpecificationRUSBF250-2CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
RF3379-000 RUSBF075 RoHS No 07/04/2018 PbFree No 07/04/2018 CoC_RoHS10_RF3379-000_RUSBF075 REACH191_Declaration_RF3379-000 Yes
Does not Contain
RF3382-000 RUSBF090 RoHS No 05/04/2018 PbFree No 05/04/2018 CoC_RoHS10_RF3382-000_RUSBF090 REACH197_Declaration_RF3382-000_RUSBF090 Yes
Does not Contain
RF3383-000 RUSBF090-2 RoHS No 11/19/2020 PbFree No 11/19/2020 CoC_RoHS10_RF3383-000_RUSBF090-2 REACH209_Declaration_RF3383-000_RUSBF090-2 Yes
Does not Contain
RF3384-000 RUSBF110 RoHS No 03/05/2018 PbFree No 03/05/2018 CoC_RoHS10_RF3384-000_RUSBF110 REACH181_Declaration_RF3384-000_RUSBF110 No
Does not Contain
RF3385-000 RUSBF110-2 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3385-000 REACH174_Declaration_RF3385-000 No
Does not Contain
RF3386-000 RUSBF120 RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS10_RF3386-000_RUSBF120 REACH191_Declaration_RF3386-000_RUSBF120 No
Does not Contain
RF3387-000 RUSBF120-2 RoHS No 01/12/2018 PbFree No 01/12/2018 CoC_RoHS10_RF3387-000 REACH174_Declaration_RF3387-000 No
Does not Contain
RF3388-000 RUSBF135 RoHS No 12/25/2017 PbFree No 12/25/2017 CoC_RoHS10_RF3388-000_(RUSBF135) REACH219_Declaration_RF3388-000_(RUSBF135) No
Does not Contain
RF3391-000 RUSBF155 RoHS No 06/24/2019 PbFree No 06/24/2019 CoC_RoHS10_RF3391-000_RUSBF155 REACH197_Declaration_RF3391-000_RUSBF155
Does not Contain
RF3392-000 RUSBF155-2 RoHS No 12/13/2016 PbFree No 12/13/2016 No
RF3394-000 RUSBF160 RoHS No 04/06/2021 PbFree No 04/06/2021 CoC_RoHS10_RF3394-000_RUSBF160 REACH211_Declaration_RF3394-000_RUSBF160 No
Does not Contain
RF3212-000 RUSBF185 RoHS No 06/06/2018 PbFree No 06/06/2018 CoC_RoHS10_RF3212-000_RUSBF185 REACH191_Declaration_RF3212-000_RUSBF185 No
Does not Contain
RF3397-000 RUSBF185-AP RoHS No 10/25/2018 PbFree No 10/25/2018 CoC_RoHS10_RF3397-000_RUSBF185-AP REACH191_Declaration_RF3397-000_RUSBF185-AP No
Does not Contain
RF3398-000 RUSBF250 RoHS No 04/23/2018 PbFree No 04/23/2018 CoC_RoHS10_RF3398-000_(RUSBF250) REACH181_Declaration_RF3398-000_RUSBF250 No
Does not Contain
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