Surface Mount Thermistors Leadless Top Bottom Terminated Chip Thermistor BC Series Leadless Top/Bottom Terminated Chip Thermistors Description Littelfuse leadless top/bottom terminated chip thermistor elements are designed for use on hybrid substrates, integrated circuits and printed circuit boards. They have silver metallization on their top and bottom surfaces which are suitable for various contact techniques including epoxy or solder. Other metallization materials are available as well. Since they are manufactured using the most advanced equipment and technology available, their dimensional parameters are extremely uniform, making the devices especially suitable for use with automatic handling and placement equipment. Options Non-standard Special encapsulants or probe housings resistance values and tolerances Tape and reel packaging Special lead materials and lengths Dimensions Features A Surface mountable Low cost Small size Rapid response time Very low profile B SILVER METALLIZATION TOP AND BOTTOM Part Numbering System C THICKNESS BC 10 1 B 1 K Series Dimensions shown in inches. Resistance Tolerance K = 10% Resistance 25C A B C A B C No Significance Base Value R-T Curve See Dim See Dim See Dim Multiplier, power of 10 L W T 1 See Dim See Dim See Dim Ex. 101 = 10 x 10 = 100 L W T Note: Not all combinations of Part Number codes are available. Contact Littelfuse for details. LEADLESS CHIP THERMISTORS L W SILVER METALLIZATION TOP AND BOTTOM T (THICKNESS) 2018 Littelfuse, Inc. Revised: February 26, 2018 1 littelfuse.com Specifications are subject to change without notice. Surface Mount Thermistors Leadless Top Bottom Terminated Chip Thermistor BC Series Leadless Top/Bottom Terminated Chip Thermistors Specifications Thermal Dissipation Resistance *Resistance Temperature Time Temperature Part R-T Beta (K) Constant, Ohms Tol. % Coefficient Constant, Rating Number Curve 0-50C Nominal 25C 25C (%/C) 25C Max. - Still (C) (mW/C) Air (seconds) BC101B1K 100 10 B -3.31 2941 1 2 -55 to +150 BC501B1K 500 10 B -3.31 2941 1 2 -55 to +150 BC102F1K 1000 10 F -3.86 3419 1 2 -55 to +150 BC222J1K 2252 10 J -4.4 3892 1 2 -55 to +150 BC302J1K 3000 10 J -4.4 3892 1 2 -55 to +150 BC502J1K 5000 10 J -4.4 3892 1 2 -55 to +150 BC103J1K 10000 10 J -4.4 3892 1 2 -55 to +150 BC203J1K 20000 10 J -4.4 3892 1 2 -55 to +150 BC303J1K 30000 10 J -4.4 3892 1 2 -55 to +150 BC503J1K 50000 10 J -4.4 3892 1 2 -55 to +150 BC104R1K 100000 10 R -4.68 4140 1 2 -55 to +150 *Resistance tolerances of 1%, 2%, and 5% are available upon request Packaging Packaging Option Packaging Code Standard ESD Waffle Pack -WF NA 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 2 littelfuse.com Specifications are subject to change without notice.