KW104R2

Leaded Thermistors Interchangeable Thermistor KW Series Precision Interchangeable Thermistors Description Littelfuse precision interchangeable thermistors are low cost, highly accurate, stable devices designed specifically for temperature sensing and control applications. They are particularly suited for uses where their precision interchangeability eliminates the necessity for costly individual circuit calibration. Options • Non-standard • Special encapsulants or probe housings resistance values and tolerances • Special lead materials and lengths Features Dimensions EPOXY COATING B A KYNAR INSULATED WIRE C • High accuracy • Epoxy encapsulated • Fast thermal response • High stability • Low cost • Long life • Small size • R/T Curve-matched Part Numbering System D KW 10 2 J 2 Series Dimensions shown in inches. A A 0.250” Nom B 0.250" NOM B C D C 30 AWG 0.095" (0.010") MAX 30 AWG 0.010” 1.5" ±0.250" 0.095” Max Resistance @ 25ºC Base Value D 1.5” ±0.250” 28 AWG (0.013") KYNAR INSULATED WIRE R-T Curve Multiplier, power of 10 Ex. 102 = 10 Ω x 102 = 1,000 Ω Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. “KW” SERIES 0.250" NOM No Significance EPOXY COATING 0.095" MAX 1.5" 0.250" © 2021 Littelfuse, Inc. Revised: March 23, 2021 Specifications are subject to change without notice. 1 littelfuse.com Leaded Thermistors Interchangeable Thermistor KW Series Precision Interchangeable Thermistors Specifications Beta (K) 0-50°C Dissipation Constant, Nominal (mW/°C) Thermal Time Constant, Max. - Still Air (seconds) Thermal Time Constant, Max. - Well Stirred Oil (seconds) Storage & Operation Temp for Best L/T Stability (°C) Part Number Resistance Ohms @25°C Accuracy (±°C) 0-70°C R-T Curve Temperature Coefficient (% / °C) @ 25°C KW102J2 1000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW222J2 2252 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW302J2 3000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW502J2 5000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW602J2 6000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW103G2 10000 ±0.5°C G -4.04 3575 1 10 1 -80 to +135 -80 to +120 KW103J2 10000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW203J2 20000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW303J2 30000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW503J2 50000 ±0.5°C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KW503R2 50000 ±0.5°C R -4.68 4140 1 10 1 -80 to +135 -80 to +120 KW104R2 100000 ±0.5°C R -4.68 4140 1 10 1 -80 to +135 -80 to +120 Temperature Rating (°C) 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 Specifications are subject to change without notice. 2 littelfuse.com