BC Series - Leadless Top/Bottom Terminated Chip Thermistors (150°C)

Series: BC
Littelfuse Surface Mount Thermistors BC image
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, 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 leadless chip thermistor elements are designed for use on hybrid substrates, integrated circuits or printed circuit boards. They have silver metallization on their top and bottom surfaces which are suitable for various contact techniques including epoxy or solder. Other metallization materials are available as well. Since they are manufactured using the most advanced equipment and technology available, their dimensional parameters are extremely uniform, making the devices especially suitable for use with automatic handling and placement equipment.


  • Surface mountable
  • Small size
  • Very low profile
  • Low cost
  • Rapid response time


  • Non-standard resistance values and tolerances
  • Special electrode materials
  • Special dimensions
  • Tape and reel packaging


  • Thermal time constant: 2 seconds max
  • Dissipation constant: 1mW/°C
  • Rated to +150°C maximum operating temperature

Access specifications, certifications, check availability and order parts below

Catalog #Resis Ω @ 25°CResis Tol ± % @25°CR-T CurveOperating TemperatureEngineering DrawingRT TablePartner ECAD ModelsStockSamplesCompare
BC101B1K10010B-55° to 150°CEngineeringRTBC101B1K
BC102F1K100010F-55° to 150°CEngineeringRTBC102F1KCheck
BC103J1K1000010J-55° to 150°CEngineeringRTBC103J1KCheckOrder
BC104R1K10000010R-55° to 150°CEngineeringRTBC104R1KCheck
BC203J1K2000010J-55° to 150°CEngineeringRTBC203J1KCheck
BC222J1K225210J-55° to 150°CEngineeringRTBC222J1KCheck
BC302J1K300010J-55° to 150°CEngineeringRTBC302J1KCheck
BC303J1K3000010J-55° to 150°CEngineeringRTBC303J1KCheck
BC501B1K50010B-55° to 150°CEngineeringRTBC501B1KCheck
BC502J1K500010J-55° to 150°CEngineeringRTBC502J1KCheck
BC503J1K5000010J-55° to 150°CEngineeringRTBC503J1KCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
BC103J1K THERMISTOR, U.S. SENS RoHS No 03/16/2020 PbFree No 03/16/2020 CoC_RoHS10_BC103J1K REACH205_Declaration_BC103J1K Yes
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