Leaded Thermistors Glass Encapsulated Thermistor USUG1000 Series UL Recognized DO-35 Glass Encapsulated Thermistors Description Littelfuse low cost interchangeable glass encapsulated thermistors are manufactured using super stable, precision 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. They are well suited for uses where their interchangeability eliminates the necessity for costly individual circuit calibration. Their uniform dimensions and axial lead configuration make them especially suitable for use with automatic insertion equipment. Features Temperature rating = Excellent long-term Agency Approvals -40 to +150C stability Hermetically sealed Tinned CSS Lead AGENCY AGENCY FILE NUMBER glass package Wires are Solderable or Weldable E232830 Part Numbering System Dimensions USUG1000-10 3 G GLASS BODY Resistance Tolerance DO-35 UL Series G = 2% A J = 5% Resistance 25C K = 10% B Base Value Multiplier, power of 10 3 Ex. 103 = 10 x 10 = 10,000 C Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. Dimensions shown in inches. A B C A B C 0.020 0.002 0.075 0.160 24 AWG TINNED CCS MAX MAX 0.0200.002 1.0 LONG MIN 0.075 0.160 24 AWG Tinned CCS Max Max 1.0 Long Min GLASS ENCAPSULATED THERMISTORS GLASS BODY 0.020 0.002 Packaging 24 AWG TINNED CCS 1.0 LONG MIN Packaging Option Packaging Code Standard Quantity Standard 0.075 MAX Tape and Reel -TR 5000 EIA-296 0.160 MAX 2021 Littelfuse, Inc. Revised: March 23, 2021 1 littelfuse.com Specifications are subject to change without notice. Leaded Thermistors Glass Encapsulated Thermistor USUG1000 Series UL Recognized DO-35 Glass Encapsulated Thermistors Specifications Temperature Max. Dissipation Resistance *Resistance Temperature Part R-T Coefficient Beta (K) Power Constant, Ohms Tol. % Rating Number Curve (%/C) 0-50C Rating Nominal 25C 25C (C) 25C (mW) (mW/C) USUG1000-103G 10000 2 J 3892 20 2 -40 to +150 USUG1000-103J 10000 5 J 3892 20 2 -40 to +150 USUG1000-103K 10000 10 J 3892 20 2 -40 to +150 USUG1000-203G 20000 2 J 3892 20 2 -40 to +150 USUG1000-203J 20000 5 J 3892 20 2 -40 to +150 USUG1000-203K 20000 10 J 3892 20 2 -40 to +150 USUG1000-253G 25000 2 J 3892 20 2 -40 to +150 USUG1000-253J 25000 5 J 3892 20 2 -40 to +150 USUG1000-253K 25000 10 J 3892 20 2 -40 to +150 USUG1000-303G 30000 2 J 3892 20 2 -40 to +150 USUG1000-303J 30000 5 J 3892 20 2 -40 to +150 USUG1000-303K 30000 10 J 3892 20 2 -40 to +150 USUG1000-503G 50000 2 J 3892 20 2 -40 to +150 USUG1000-503J 50000 5 J 3892 20 2 -40 to +150 USUG1000-503K 50000 10 J -3.67 3892 20 2 -40 to +150 USUG1000-104G 100000 2 J 3892 20 2 -40 to +150 USUG1000-104J 100000 5 J 3892 20 2 -40 to +150 USUG1000-104K 100000 10 J 3892 20 2 -40 to +150 USUG1000-254G 250000 2 J 3892 20 2 -40 to +150 USUG1000-254J 250000 5 J 3892 20 2 -40 to +150 USUG1000-254K 250000 10 J 3892 20 2 -40 to +150 *Resistance tolerances of 1%, 2%, and 5% are available upon request 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 may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics 2021 Littelfuse, Inc. Revised: March 23, 2021 2 littelfuse.com Specifications are subject to change without notice.