TCF250 Series - 250V PolySwitch Lead-Free Resettable PPTC for Telecom Protection - Non-Solderable Chip Device

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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.

  • RoHS compliant
  • 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


  • Choice of many product options helps engineers by improving design flexibility
  • Compatible with high-volume electronics assembly
  • Help improve line balance
  • Applicable for legacy POTS and modern digital communications equipment
  • 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
Max Volts
Interrupt Current (A)Interrupt Voltage (Vrms)Max Operating Temp (°C)Pd Typical (watts)Product
Partner ECAD ModelsStockSamplesCompare
TCF250-100T-B- SpecificationTCF250-100T-B-0.5CheckOrder
TCF250-1200.120.246059143250850.8Product SpecificationTCF250-120CheckOrder
TCF250-120T-B- SpecificationTCF250-120T-B-0.5CheckOrder
TCF250-120T-RA-B- SpecificationTCF250-120T-RA-B-0.5CheckOrder
TCF250-120T-RB-B- SpecificationTCF250-120T-RB-B-0.5CheckOrder
TCF250-1450.1450.296036143250851Product SpecificationTCF250-145CheckOrder
TCF250-145-RB-B-0.50.1450.29604.36143250851Product SpecificationTCF250-145-RB-B-0.5CheckOrder
TCF250-145T-B-0.50.1450.296059143250851Product SpecificationTCF250-145T-B-0.5CheckOrder
TCF250-180T0.180.38601.934.23250850.8Product SpecificationTCF250-180TCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
F39331-000 TCF250-100T-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
D52299-000 TCF250-120 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_D52299-000_TCF250-120 Yes
IPC_D52299-000 (TCF250-120)
C06885-000 TCF250-120T-RA-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
D20918-000 TCF250-120T-RB-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
F78914-000 TCF250-145 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
A25043-000 TCF250-145-RB-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 CoC_RoHS10_A25043-000_TCF250-145-RB-B-0.5 REACH201_Declaration_A25043-000_TCF250-145-RB-B-0.5 Yes
Does not Contain IPC_A25043-000 (TCF250-145-RB-B-0.5)
RF0065-000 TCF250-145T-B-0.5 RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
RF1395-000 TCF250-180T RoHS No 04/26/2016 PbFree No 04/26/2016 Yes
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