TRF250 Series - 250V PolySwitch Lead-Free Radial Leaded Resettable PPTC for Telecom Protection

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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 PolySwitch families of telecommunications and networking devices help meet the growing demand for resettable overcurrent protection. These product families help provide protection against damage caused by power cross and power induction surges as defined in ITU, Telcordia GR1089 and UL60950. Our offering includes chip, surface-mount and radial-leaded configurations.

Features:
Resettable, Quick Time to Trip

  • Resettable overcurrent protection
  • Surface-mount, radial-leaded, and chip form factors
  • Fast time-to-trip
  • Agency recognition: UL, CSA, TÜV
  • Resistance sorted and matched devices available
  • Low parasitic capacitance/flat impedance with frequency

Benefits:

  • Many product choices give engineers increased design flexibility
  • Compatible with high-volume electronics assembly
  • Help improve line balance
  • Applicable for legacy POTS and modern digital communications equipment

Applications:
Networking Machines and Systems

  • Modems
  • Phone sets
  • Fax machines
  • Phone wall outlets
  • Alarm systems
  • PBX systems
  • MDF modules
  • Analog and digital line cards
  • T1/E1 equipment
  • xDSL modems and splitters
  • Powered Ethernet systems
  • VoIP (Voice over Internet Protocol) equipment
  • LAN, WAN equipment
  • Customer premise equipment
  • Access network hardware

Access specifications, certifications, check availability and order parts below

Catalog #IHold (A)ITRIP
(A)
Max Volts
(V)
RMIN
(Ω)
Rmax
(Ω)
R1max
(Ω)
Interrupt Current (A)Interrupt Voltage (Vrms)Max Operating Temp (°C)Pd Typical (watts)Product
Specification
Partner ECAD ModelsStockSamplesCompare
TRF250-055T0.0550.17601525353250850.6Product SpecificationTRF250-055TCheckOrder
TRF250-055UT0.0550.17601525353250850.6Product SpecificationTRF250-055UTCheckOrder
TRF250-080T0.080.16601522333250850.6Product SpecificationTRF250-080TCheckOrder
TRF250-080U0.080.16601420333250850.6Product SpecificationTRF250-080UCheckOrder
TRF250-110U0.110.226059163250850.6Product SpecificationTRF250-110UCheckOrder
TRF250-110U-B-0.5-20.110.226059163250850.6Product SpecificationTRF250-110U-B-0.5-2CheckOrder
TRF250-1200.120.246048163250850.8Product SpecificationTRF250-120CheckOrder
TRF250-120-20.120.246048163250850.8Product SpecificationTRF250-120-2CheckOrder
TRF250-120-B-0.50.120.246048163250850.8Product SpecificationTRF250-120-B-0.5CheckOrder
TRF250-120S-B-0.50.120.246048163250850.8Product SpecificationTRF250-120S-B-0.5CheckOrder
TRF250-120T0.120.2460712163250850.8Product SpecificationTRF250-120TCheckOrder
TRF250-120T-20.120.2460712163250850.8Product SpecificationTRF250-120T-2CheckOrder
TRF250-120T-B-0.50.120.2460712163250850.8Product SpecificationTRF250-120T-B-0.5CheckOrder
TRF250-120T-R1-B-0.50.120.246069163250850.8Product SpecificationTRF250-120T-R1-B-0.5CheckOrder
TRF250-120T-R2-B-0.50.120.2460810.5163250850.8Product SpecificationTRF250-120T-R2-B-0.5CheckOrder
TRF250-120T-R2-B-0.5-20.120.2460810.5163250850.8Product SpecificationTRF250-120T-R2-B-0.5-2CheckOrder
TRF250-120T-RA-B-0.50.120.246079163250850.8Product SpecificationTRF250-120T-RA-B-0.5CheckOrder
TRF250-120T-RC-B-0.50.130.26605.47.5143250850.8Product SpecificationTRF250-120T-RC-B-0.5CheckOrder
TRF250-120T-RF-B-0.50.120.2460610.5163250850.8Product SpecificationTRF250-120T-RF-B-0.5CheckOrder
TRF250-120T-RF-B-0.5-20.120.2460610.5163250850.8Product SpecificationTRF250-120T-RF-B-0.5-2CheckOrder
TRF250-120T-RH-B-0.50.120.2460911163250850.8Product SpecificationTRF250-120T-RH-B-0.5CheckOrder
TRF250-120U0.120.2460610163250850.7Product SpecificationTRF250-120UCheckOrder
TRF250-120U-20.120.2460610163250850.7Product SpecificationTRF250-120U-2CheckOrder
TRF250-120US0.120.2460610163250850.7Product SpecificationTRF250-120USCheckOrder
TRF250-120US-20.120.2460610163250850.7Product SpecificationTRF250-120US-2CheckOrder
TRF250-120UT0.120.2460712163250850.7Product SpecificationTRF250-120UTCheckOrder
TRF250-1450.1450.296036143250850.8Product SpecificationTRF250-145CheckOrder
TRF250-145-20.1450.296036143250850.8Product SpecificationTRF250-145-2CheckOrder
TRF250-145-B-0.50.1450.296036143250850.8Product SpecificationTRF250-145-B-0.5CheckOrder
TRF250-145-RA-B-0.50.1450.296036143250850.8Product SpecificationTRF250-145-RA-B-0.5CheckOrder
TRF250-145T0.1450.29605.47.5143250850.8Product SpecificationTRF250-145TCheckOrder
TRF250-145T-20.1450.29605.47.5143250850.8Product SpecificationTRF250-145T-2CheckOrder
TRF250-145T-B-0.50.1450.29605.47.5143250850.8Product SpecificationTRF250-145T-B-0.5CheckOrder
TRF250-145U0.1450.29603.56.5143250850.7Product SpecificationTRF250-145UCheckOrder
TRF250-145U-20.1450.29603.56.5143250850.7Product SpecificationTRF250-145U-2CheckOrder
TRF250-145US0.1450.29603.56.5143250850.7Product SpecificationTRF250-145USCheckOrder
TRF250-145US-B-0.50.1450.29603.56.5143250850.7Product SpecificationTRF250-145US-B-0.5CheckOrder
TRF250-1800.180.651000.82.2410250850.9Product SpecificationTRF250-180CheckOrder
TRF250-180-20.180.651000.82.2410250850.9Product SpecificationTRF250-180-2CheckOrder
TRF250-180-AP0.180.651000.82.2410250850.9Product SpecificationTRF250-180-APCheckOrder
TRF250-1830.1830.6851000.823.410250850.9Product SpecificationTRF250-183CheckOrder
TRF250-183-20.1830.6851000.823.410250850.9Product SpecificationTRF250-183-2CheckOrder
TRF250-183S0.1830.6851000.823.410250850.9Product SpecificationTRF250-183SCheckOrder
TRF250-183S-20.1830.6851000.823.410250850.9Product SpecificationTRF250-183S-2CheckOrder
TRF250-183U0.1830.6851000.823.410250850.9Product SpecificationTRF250-183UCheckOrder
TRF250-183US0.1830.6851000.823.410250850.9Product SpecificationTRF250-183USCheckOrder
TRF250-1840.18411001.22.43.110250850.9Product SpecificationTRF250-184CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
RF1968-000 TRF250-055T RoHS No 06/27/2019 PbFree No 06/27/2019 Yes
06/27/2019
RF1647-000 TRF250-055UT RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0124-000 TRF250-080T RoHS No 02/06/2017 PbFree No 02/06/2017 CoC_RoHS10_RF0124-000_-TRF250-080T-_03-14-2019 REACH197_Declaration_RF0124-000_-TRF250-080T-_03-14-2019 No
02/06/2017
Does not Contain
RF0125-000 TRF250-080U RoHS No 02/20/2019 PbFree No 02/20/2019 CoC_RoHS10_RF0125-000_-TRF250-080U-_02-09-2021 REACH211_Declaration_RF0125-000_-TRF250-080U-_02-09-2021 No
02/20/2019
Does not Contain
RF0126-000 TRF250-110U RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF4282-000 TRF250-110U-B-0.5-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0008-000 TRF250-120 RoHS No 10/27/2016 PbFree No 10/27/2016 CoC_RoHS10_RF0008-000_-TRF250-120-_11-4-2019 REACH219_Declaration_RF0008-000_(TRF250-120)_09-07-2021 No
10/27/2016
Does not Contain
RF0012-000 TRF250-120-2 RoHS No 09/02/2018 PbFree No 09/02/2018 CoC_RoHS10_RF0012-000_-TRF250-120-2-_11-20-2018 REACH191_Declaration_RF0012-000_-TRF250-120-2-_09-03-2018 No
09/02/2018
Does not Contain
RF1682-000 TRF250-120-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0430-000 TRF250-120S-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0013-000 TRF250-120T RoHS No 10/17/2017 PbFree No 10/17/2017 CoC_RoHS10_RF0013-000_-TRF250-120T-_01-29-2018 REACH219_Declaration_RF0013-000_(TRF250-120T)_09-03-2021 No
10/17/2017
Does not Contain
RF0537-000 TRF250-120T-2 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF0537-000_(TRF250-120T-2)_11-25-2021 REACH219_Declaration_RF0537-000_(TRF250-120T-2)_11-25-2021 No
04/26/2016
Does not Contain
RF0014-000 TRF250-120T-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0015-000 TRF250-120T-R1-B-0.5 RoHS No 06/01/2017 PbFree No 06/01/2017 CoC_REACh181_RF0015-000_-TRF250-120T-R1-B-0.5-_03-13-2018 No
06/01/2017
RF0425-000 TRF250-120T-R2-B-0.5 RoHS No 02/20/2017 PbFree No 02/20/2017 No
02/20/2017
RF0327-000 TRF250-120T-R2-B-0.5-2 RoHS No 05/17/2019 PbFree No 05/17/2019 CoC_RoHS10_RF0327-000_-TRF250-120T-R2-B-0.5-2-_07-26-2019 REACH201_Declaration_RF0327-000_-TRF250-120T-R2-B-0.5-2-_07-26-2019 No
05/17/2019
Does not Contain
RF0016-000 TRF250-120T-RA-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0361-000 TRF250-120T-RC-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0105-000 TRF250-120T-RF-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0668-000 TRF250-120T-RF-B-0.5-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF2519-000 TRF250-120T-RH-B-0.5 RoHS No 05/29/2019 PbFree No 05/29/2019 CoC_RoHS10__RF2519-000_-TRF250-120T-RH-B-0.5-_05-29-2019 REACH197_Declaration_RF2519-000_-TRF250-120T-RH-B-0.5-_05-29-2019 No
05/29/2019
Does not Contain
RF0017-000 TRF250-120U RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0150-000 TRF250-120U-2 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF0150-000_-TRF250-120U-2-_02-18-2021 Yes
04/26/2016
RF0019-000 TRF250-120US RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0431-000 TRF250-120US-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0018-000 TRF250-120UT RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0021-000 TRF250-145 RoHS No 01/27/2017 PbFree No 01/27/2017 CoC_RoHS10_RF0021-000_-TRF250-145-_12-14-2020 REACH191_Declaration_RF0021-000_-TRF250-145-_02-27-2019 No
01/27/2017
Does not Contain
RF0035-000 TRF250-145-2 RoHS No 06/27/2018 PbFree No 06/27/2018 CoC_RoHS10_RF0035-000_-TRF250-145-2-_06-27-2018 REACH191_Declaration_RF0035-000_-TRF250-145-2-_08-22-2018 No
06/27/2018
Does not Contain
RF0043-000 TRF250-145-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0044-000 TRF250-145-RA-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF0044-000_-TRF250-145-RA-B-0.5-_05-28-2019 REACH197_Declaration_RF0044-000_-TRF250-145-RA-B-0.5-_05-28-2019
Does not Contain
RF0022-000 TRF250-145T RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF4278-000 TRF250-145T-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0045-000 TRF250-145T-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0027-000 TRF250-145U RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_RF0027-000_-TRF250-145U-_09-10-2019 REACH201_Declaration_RF0027-000_-TRF250-145U-_09-10-2019 Yes
04/26/2016
Does not Contain
RF0036-000 TRF250-145U-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0029-000 TRF250-145US RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0030-000 TRF250-145US-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
E46226-000 TRF250-180 RoHS No 07/12/2018 PbFree No 07/12/2018 CoC_RoHS10_E46226-000_-TRF250-180-_01-06-2019 REACH209_Declaration_E46226-000_-TRF250-180-_07-27-2020 No
07/12/2018
Does not Contain
C32417-000 TRF250-180-2 RoHS No 12/27/2016 PbFree No 12/27/2016 CoC_RoHS10_C32417-000_(TRF250-180-2)_10-06-2021 REACH219_Declaration_C32417-000_(TRF250-180-2)_10-06-2021 No
12/27/2016
Does not Contain
RF3446-000 TRF250-180-AP RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0768-000 TRF250-183 RoHS No 05/17/2018 PbFree No 05/17/2018 CoC_RoHS10_RF0768-000_-TRF250-183-_05-18-2018 No
05/17/2018
RF1809-000 TRF250-183-2 RoHS No 11/04/2016 PbFree No 11/04/2016 CoC_RoHS10_RF1809-000_-TRF250-183-2-_09-12-2017 REACH191_Declaration_RF1809-000_-TRF250-183-2-_11-20-2018 No
11/04/2016
Does not Contain
RF0769-000 TRF250-183S RoHS No 05/17/2018 PbFree No 05/17/2018 CoC_RoHS10_RF0769-000_-TRF250-183S-_05-18-2018 No
05/17/2018
RF0841-000 TRF250-183S-2 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0770-000 TRF250-183U RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF0771-000 TRF250-183US RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
04/26/2016
RF1135-000 TRF250-184 RoHS No 05/12/2017 PbFree No 05/12/2017 No
05/12/2017
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