WM103J1B

Surface Mount Thermistors MELF Style Thermistor LL 34 MiniMELF WM Description Littelfuse LL-34 “MiniMELF” style interchangeable 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. They are well suited for uses where their interchangeability eliminates the necessity for costly individual circuit calibration. Their uniform dimensions make them especially suitable for use with automatic insertion equipment. Options • Non-standard resistance values and tolerances Dimensions • High temperature capability to +220°C • Surface mountable • Hermetically sealed TINNED DUMET CONTACT TABS B Dimensions shown in inches. 0.135" 0.012" A B 0.135” ± 0.012” 0.019” ± 0.005” B C 0.019" C 0.005" 0.060" 0.005" • Tape and Reel Packaging • Low cost • Excellent long-term stability glass package GLASS BODY A specified temperatures Features A C • Point matched at Part Numbering System WM 10 3 J 1 A Series 0.060” ± 0.005” Resistance @ 25ºC Base Value Resistance Tolerance No Significance R-T Curve Multiplier, power of 10 0.135" 0.012" Ex. 103 = 10 Ω x 103 = 10,000 Ω TINNED Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. DUMET CONTACT TABS 0.060" 0.005" 0.019" 0.005" © 2018 Littelfuse, Inc. Revised: February 26, 2018 Specifications are subject to change without notice. GLASS BODY 1 littelfuse.com Surface Mount Thermistors MELF Style Thermistor LL 34 MiniMELF WM Specifications Beta (K) 0-50°C Dissipation Constant, Nominal (mW/°C) Thermal Time Constant, Max. - Still Air (seconds) Temperature Rating (°C) -4.4 3892 2 8 -55 to +220 ± 1.0 °C -4.4 3892 2 8 -55 to +220 15000 ± 1.0 °C -4.4 3892 2 8 -55 to +220 WM203J1A 20000 ± 1.0 °C -4.4 3892 2 8 -55 to +220 WM503J1A 50000 ± 1.0 °C -4.4 3892 2 8 -55 to +220 WM104J1A 100000 ± 1.0 °C -4.4 3892 2 8 -55 to +220 Part Number Resistance Ohms @25°C Accuracy (0 °C to +100 °C) Temperature Coefficient (% / °C) @ 25°C WM103J1A 10000 ± 1.0 °C WM103J1B 10000 WM153J1A Packaging Packaging Option Packaging Code Standard Quantity Standard Tape and Reel -TR 2500 EIA-481 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 © 2018 Littelfuse, Inc. Revised: February 26, 2018 Specifications are subject to change without notice. 2 littelfuse.com