Leaded Thermistors Interchangeable Thermistor KX 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 High accuracy Epoxy encapsulated Fast thermal response High stability Low cost Long life EPOXY B Small size R/T Curve-matched COATING KYNAR A INSULATED WIRE C Part Numbering System D KX 1 0 2 J 2 Series No Significance Dimensions shown in inches. A B C D R-T Curve Resistance 25C A B C D 0.250 30 AWG 0.095 1.5 Base Value ( ) NOM 0.010 MAX 0.250 0.250 30 AWG 0.095 1.5 Multiplier, power of 10 2 Nom 0.010 Max 0.250 Ex. 102 = 10 x 10 = 1,000 KX SERIES Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. EPOXY COATING 0.250 ( ) 28 AWG 0.013 KYNAR NOM INSULATED WIRE 0.095 MAX 1.5 0.250 2021 Littelfuse, Inc. Revised: March 23, 2021 1 littelfuse.com Specifications are subject to change without notice. Leaded Thermistors Interchangeable Thermistor KX Series Precision Interchangeable Thermistors Specifications Thermal Thermal Storage & Temperature Dissipation Time Time Resistance Accuracy Temperature Operation Part R-T Coefficient Beta (K) Constant, Constant, Constant, Ohms (C) Rating Temp for Best Number Curve (% / C) 0-50C Nominal Max. - Still Max. - Well 25C 0-70C (C) L/T Stability 25C (mW/C) Air Stirred Oil (C) (seconds) (seconds) KX102J2 1000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX222J2 2252 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX302J2 3000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX502J2 5000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX602J2 6000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX103G2 10000 1.0C G -4.04 3575 1 10 1 -80 to +135 -80 to +120 KX103J2 10000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX203J2 20000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX303J2 30000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX503J2 50000 1.0C J -4.4 3892 1 10 1 -80 to +135 -80 to +120 KX503R2 50000 1.0C R -4.68 4140 1 10 1 -80 to +135 -80 to +120 KX104R2 100000 1.0C R -4.68 4140 1 10 1 -80 to +135 -80 to +120 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.