RKEF Series - 60V PolySwitch Lead-Free Radial Leaded Resettable PPTC

PTC RKEF Series Image
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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.

Littelfuse PolySwitch radial-leaded devices represent the most comprehensive and complete set of PPTC products available in the industry today. RKEF series is for balance of voltage rating (60V) and hold current (up to 5A).

Features & Benefits

  • Resettable and single-use overcurrent devices
  • Wide range of form factor and termination methods
  • Devices compatible with high-volume electronics assembly
  • RoHS compliant, Lead-Free and Halogen-Free


  • 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
RKEF0500.51400.320.5290.90.8851Product SpecificationRKEF050CheckOrder
RKEF050-AP0.51400.320.5290.90.8851Product SpecificationRKEF050-APCheckOrder
RKEF0650.651.3400.250.450.721851.25Product SpecificationRKEF065CheckOrder
RKEF065-AP0.651.3400.250.450.721851.25Product SpecificationRKEF065-APCheckOrder
RKEF0750.751.5400.20.390.641.5851.4Product SpecificationRKEF075CheckOrder
RKEF075-20.751.5400.20.390.641.5851.4Product SpecificationRKEF075-2CheckOrder
RKEF0900.91.8400.190.320.522851.5Product SpecificationRKEF090CheckOrder
RKEF1101.12.2400.170.280.473852.2Product SpecificationRKEF110CheckOrder
RKEF1351.352.7400.110.220.374.5852.3Product SpecificationRKEF135CheckOrder
RKEF1601.63.2400.10.20.329852.4Product SpecificationRKEF160CheckOrder
RKEF1851.853.7400.060.1520.2512.6852.6Product SpecificationRKEF185CheckOrder
RKEF2502.55400.040.0850.1415.6852.8Product SpecificationRKEF250CheckOrder
RKEF250K2.55400.040.0850.1415.6852.8Product SpecificationRKEF250KCheckOrder
RKEF30036400.030.050.0819.8853.2Product SpecificationRKEF300CheckOrder
RKEF300-236400.030.050.0819.8853.2Product SpecificationRKEF300-2CheckOrder
RKEF3753.757.5400.0170.040.0622853.4Product SpecificationRKEF375CheckOrder
RKEF375K3.757.5400.0170.040.0622853.4Product SpecificationRKEF375KCheckOrder
RKEF40048400.0140.0380.0624853.7Product SpecificationRKEF400CheckOrder
RKEF500510400.0120.030.0528855Product SpecificationRKEF500CheckOrder
RKEF500-1510400.0120.030.0528855Product SpecificationRKEF500-1CheckOrder
RKEF500-2510400.0120.030.0528855Product SpecificationRKEF500-2CheckOrder
RKEF500K-2510400.0120.030.0528855Product SpecificationRKEF500K-2CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
RF3054-000 RKEF050 RoHS No 12/10/2017 PbFree No 12/10/2017 CoC_RoHS10_RF3054-000 (RKEF050) REACH_SVHC Declaration_RF3054-000 (RKEF050) Yes
Does not Contain
RF3361-000 RKEF050-AP RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF3361-000_RKEF050-AP REACH209_Declaration_RF3361-000_RKEF050-AP Yes
Does not Contain
RF3363-000 RKEF065 RoHS No 10/16/2017 PbFree No 10/16/2017 CoC_RoHS10_RF3363-000 REACH_SVHC Declaration_RF3363-000 (RKEF065)
Does not Contain
RF3364-000 RKEF065-AP RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
RF3365-000 RKEF075 RoHS No 10/16/2017 PbFree No 10/16/2017 CoC_RoHS10_RF3365-000_RKEF075 REACH_SVHC Declaration_RF3365-000 (RKEF075) Yes
Does not Contain
RF3899-000 RKEF075-2 RoHS No 06/29/2018 PbFree No 06/29/2018 CoC_RoHS10_RF3899-000_(RKEF075-2) REACH219_Declaration_RF3899-000_(RKEF075-2) Yes
Does not Contain
RF3366-000 RKEF090 RoHS No 01/29/2017 PbFree No 01/29/2017 CoC_RoHS10_RF3366-000_RKEF090 REACH191_Declaration_RF3366-000_RKEF090 Yes
Does not Contain
RF3367-000 RKEF110 RoHS No 04/26/2017 PbFree No 04/26/2017 CoC_RoHS10_RF3367-000_(RKEF110) REACH_SVHC Declaration_RF3367-000 (RKEF110) Yes
Does not Contain
RF3369-000 RKEF135 RoHS No 05/30/2017 PbFree No 05/30/2017 CoC_RoHS10_RF3369-000_RKEF135 REACH211_Declaration_RF3369-000_RKEF135 Yes
Does not Contain
RF3370-000 RKEF160 RoHS No 11/02/2017 PbFree No 11/02/2017 CoC_RoHS10_RF3370-000_RKEF160 REACH219_Declaration_RF3370-000_(RKEF160) Yes
Does not Contain
RF3371-000 RKEF185 RoHS No 02/16/2017 PbFree No 02/16/2017 CoC_RoHS10_RF3371-000_RKEF185 REACH_SVHC Declaration_RF3371-000 (RKEF185) Yes
Does not Contain
RF3372-000 RKEF250 RoHS No 04/26/2017 PbFree No 04/26/2017 CoC_RoHS10_RF3372-000_RKEF250 REACH_SVHC Declaration_RF3372-000 (RKEF250) Yes
Does not Contain
RF3373-000 RKEF250K RoHS No 01/16/2018 PbFree No 01/16/2018 CoC_RoHS10_RF3373-000 REACH191_Declaration_RF3373-000 Yes
Does not Contain
RF3374-000 RKEF300 RoHS No 02/16/2017 PbFree No 02/16/2017 CoC_RoHS10_RF3374-000_RKEF300 REACH_SVHC Declaration_RF3374-000 (RKEF300) Yes
Does not Contain IPC_RF3374-000 (RKEF300)
RF3796-000 RKEF300-2 RoHS No 02/07/2018 PbFree No 02/07/2018 CoC_RoHS10_RF3796-000_RKEF300-2 Yes
RF3375-000 RKEF375 RoHS No 04/26/2017 PbFree No 04/26/2017 CoC_RoHS10_RF3375-000_RKEF375 REACH197_Declaration_RF3375-000_RKEF375 Yes
Does not Contain
RF3376-000 RKEF375K RoHS No 12/13/2017 PbFree No 12/13/2017 REACH191_Declaration_RF3376-000_RKEF375K Yes
Does not Contain
RF3377-000 RKEF400 RoHS No 10/10/2017 PbFree No 10/10/2017 CoC_RoHS10_RF3377-000_RKEF400 REACH219_Declaration_RF3377-000_(RKEF400) Yes
Does not Contain
RF3058-000 RKEF500 RoHS No 08/02/2017 PbFree No 08/02/2017 CoC_RoHS10_RF3058-000 (RKEF500) REACH219_Declaration_RF3058-000_(RKEF500) Yes
Does not Contain IPC_RF3058-000 (RKEF500)
RF3378-000 RKEF500-1 RoHS No 04/02/2018 PbFree No 04/02/2018 CoC_RoHS10_RF3378-000_RKEF500-1 REACH209_Declaration_RF3378-000_RKEF500-1 Yes
Does not Contain
RF4481-000 RKEF500-2 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF4481-000 (RKEF500-2) REACH_SVHC Declaration_RF4481-000 (RKEF500-2) Yes
Does not Contain
RF4451-000 RKEF500K-2 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF4451-000 (RKEF500K-2) REACH_SVHC Declaration_RF4451-000 (RKEF500K-2) Yes
Does not Contain
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