Micro Thin FT Thermistors Semitec USA Micro Thin FT Thermistors offer a ±5% tolerance rating, a 10kΩ to 360kΩ range, and a -40°C to +250°C temperature range. These FT thermistors are characterized by a fast response time enabled by the miniaturization of the thermistor dimensions. Semitec USA Micro Thin FT Thermistors are heat-resistant and ideal for wearable devices, office automation, medical devices, and measurement instruments.