Thermistors from Littelfuse, Inc.

MELF Style Thermistors -- MM103J1K

MELF Style Thermistors -- MM103J1K -- View Larger Image
MELF Style Thermistors -- MM103J1K-Image

Littelfuse LL-31 “MicroMELF” style glass encapsulated surface mount thermistors are manufactured using super stable NTC chips which are hermetically sealed in a glass package. The result is a device which exhibits excellent long-term reliability and stability even when subjected to severe environmental or thermal conditions. Their uniform dimensions make them especially suitable for use with automatic insertion equipment.


  • High temperature capability to +220°C
  • Surface mountable
  • Hermetically sealed glass package
  • Low cost
  • Excellent long-term stability


  • Non-standard resistance values and tolerances
  • Point matched at specified temperatures
  • Tape and reel packaging


  • Thermal time constant: 5 seconds max
  • Dissipation constant: 1 mW/°C


Product Category
Temperature Range
-55 to 220 C (-67 to 428 F)
Resistance (@25°C)
Lead Style