The SST201-T1-E3 is a temperature sensor manufactured by Vishay. It is a NTC thermistor, which is a type of resistor whose electrical resistance changes in response to changes in temperature. This thermistor has a nominal resistance of 10kO at 25°C, and its resistance decreases as the temperature increases. It features a thin profile and radial leads, and is designed for surface mounting on a printed circuit board (PCB). The SST201-T1-E3 also has a temperature range of -30°C - +150°C, power dissipation of 0.75mW, and a thermal time constant of 18 seconds in still air. It is ideal for temperature measurement and control applications in a wide range of industries.