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Thermistors & Platinum Sensor RTDs

ATC Semitec offer the most comprehensive range of thermistors from innovative world class manufacturers.

With our technical expertise and knowledge, we can help you find the optimum solution for your requirements.  Whether it is a specific resistance value, high accuracy, wide temperature range or fast response time, we are confident that we have a thermistor to meet those requirements.  As a result of long-term proven high quality and supply, our products are used in thousands of applications for temperature control and sensing across a large number of industries from E-Vehicles to miniature medical devices.

What is a thermistor?

Thermistors are thermally sensitive resistors whose resistance changes with temperature.  There are two main types;

  • NTC  –  In NTC thermistors, the resistance drops when the temperature increases
  • PTC  –  In PTC thermistors, the resistance rises when the temperature increases

NTC Thermistors are widely used for temperature measurement as their RT (Resistance-Temperature) characteristic is well defined and can be readily programmed into PICs etc.  NTCs are available in a multitude of formats, whether glass beadedsurface mount, rigid or flexible leads all helping to simplify the assembly and reduce production costs.


PTC Thermistors are often used as solid-state fuses/thermal switches.  Their simple step-function RT characteristic allows them to be easily incorporated into electronic circuitry.  Also in the case of motor protection thermistors, several can be used in series to protect each phase of a 3-phase motor.


“Thermistors are inexpensive, easily-obtainable temperature sensors. They are easy to use and adaptable. Circuits with thermistors can have reasonable output voltages – not the millivolt outputs thermocouples have. Because of these qualities, thermistors are widely used for simple temperature measurements. They’re not used for high temperatures, but in the temperature ranges where they work they are widely used.” Bucknell University

Semitec is our recommended manufacturer for NTC thermistors, as they revolutionised thermistor manufacture with the introduction of Semitec AT-2 offering a high level of repeatability and accuracy. They supply key manufacturers within the automotive market whilst their JT Ultra thin flexible film and  F Micro  NTC thermistors lead the way in the Medical Device market sector.


Call us today on 01606 871680 to discuss your application’s thermal sensor requirements.  Using our extensive technical knowledge and innovative supplier base, we will work with you to provide the optimum solution for your product.