This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, its specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our Note R01E.pdf sales representatives or product engineers before ordering. This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 06.1.25 PTC - NTC for Surface Mounting Application This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, its specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our Note R01E.pdf sales representatives or product engineers before ordering. This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering. 06.1.25 What is a Thermistor Thermally Sensitive Resistor Characteristics of Thermistors Resistance - Temperature Characteristics Log R PTC Thermistor Thermistor (POSISTORr) 2xR25 Positive Temperature Coefficient R25 BaTiO + X 3 Ceramics Curie Log 25 T R Point PTC NTC Thermistor R25 Negative Temperature Coefficient Mn-Ni, Mn-Co-Cu, Mn-Ni + X T Ceramics 25 NTC PRF15/18 Series Chip POSISTORr for Overheat Sensing PRF15/18 PTC Chip thermistors detect overheating of 2. High gain simplifies circuit design Hybrid ICs, Power Transistors, Power Diodes and 3. Free of contact noise and problems Power ICs etc. 4. Pb free plated terminations. 5. Sturdy construction resists mechanical vibration 1. 0402 and 0603 light weight and shock. Example +Vcc Fan Motor Power IC R1 Thermal RL Thermal Contact M Contact Comparator PRF Control IC PRF R2 RE Vref GND PRF15 Series Characteristics Sensing Temp. Maximum Resistance Part Number Characteristics Operating Temp. (at 4.7k ohm) Voltage (at +25C) PRF15BA471QB1RC BA 125 5C -20 to +140C PRF15BB471QB1RC BB 470ohm 50% 115 5C 32VDC -20 to +130C PRF15BC471QB1RC BC 105 5C -20 to +120C Dimensions Electrode Construction PTC 0.5 0.05 Cross-sectional Ceramic 0.1-0.4 0.5 0.05 1.0 0.05 (in mm) Nickel Barrier Sn Plating New