USUG1000-203J - USUG1000 Series

Series: USUG1000
Littelfuse Leaded Thermistors Glass Encapsulated Thermistors USUG1000-203J 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 UL Recognized glass encapsulated thermistors are manufactured using super stable NTC chips which are hermetically sealed in a glass (DO-35 diode style) 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 and axial lead configuration make them especially suitable for use with automatic insertion equipment.


  • Temperature rating = -40 to +150°C
  • Hermetically sealed glass package
  • Excellent long-term stability
  • Tinned CCS lead wires are solderable or weldable


  • Resistance temperature curve = "J"
  • Dissipation constant = 2mW/°C nominal (still air)
  • Maximum power rating = 20 mW
  • UL File Number E232830 (UL Category XGPU2)
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
USUG1000-203J NTC DO35 β3892 20K 5% 24AWG CCS UL RoHS No 02/20/2019 PbFree No 02/20/2019
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