Leaded Thermistors Glass Encapsulated Thermistor DO-35 Interchangeable JM 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. Options Speacial Lead Forms Point matched at specified temperatures Non-standard resistance values Tape and Reel and tolerances Packaging Dimensions GLASS Features BODY High temperature Excellent long-term A capability to +300C stability B Hermetically sealed High Voltage Insulation glass package Tinned CSS Lead High accuracy Wires are Solderable C or Weldable Low cost Dimensions shown in inches. Part Numbering System A B C A B C 0.020 0.002 0.075 0.160 24 AWG TINNED CCS 10 3 J M 1A MAX MAX 1.0 LONG MIN 0.0200.002 0.075 0.160 24 AWG Tinned CCS Resistance 25C Max Max 1.0 Long Min Base Value GLASS ENCAPSULATED THERMISTORS No Significance Multiplier, power of 10 3 Ex. 103 = 10 x 10 = 10,000 Accuracy GLASS BODY R-T Curve 24 AWG (0.020 0.002 DIA) TINNED CCS, 1.0 LONG MIN Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. 0.075 MAX 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 DO-35 Interchangeable JM Specifications Thermal Thermal Dissipation Time Time Resistance Accuracy Temperature Temperature Part R-T Beta (K) Constant, Constant, Constant, Ohms (0C to Coefficient Range Number Curve 0-50C Nominal Max. - Max. - Well 25C +100C) (% / C) 25C (C) (mW/C) Still Air Stirred Oil (seconds) (seconds) 103JM1A 10000 1.0C J -4.4 3892 2 5 0.5 -55 to +300 203JM1A 20000 1.0C J -4.4 3892 2 5 0.5 -55 to +300 253JM1A 25000 1.0C J -4.4 3892 2 5 0.5 -55 to +300 503JM1A 50000 1.0C J -4.4 3892 2 5 0.5 -55 to +300 104JM1A 100000 1.0C J -4.4 3892 2 5 0.5 -55 to +300 104JM2B 100000 J -4.4 3892 2 5 0.5 -55 to +300 Packaging Packaging Option Packaging Code Standard Quantity Standard Tape and Reel -TR 5000 EIA-296 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.