PTC Thermistors

ATC Semitec’s range of PTC thermistors are frequently used as thermal switches for over heating protection. Their step-function RT curve allows for ease of integration into circuitry where they prove to be particularly useful for motor protection.

Need more general technical information about PTC Thermistors ? Click here to visit our Frequently Asked Questions page.

Call us today on 01606 871680 or complete the Contact us form, 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.

  • Products
  • FAQs
  • Motor Protection PTC Thermistors

    ATC Semitec stocks a full range of motor protection PTC thermistors.  At their trigger point (Ts), the PTC’s resistance increases dramatically from a few hundred ohms to several thousand ohms.

    • Temperature switch points: 60°C to 190°C in 10K steps
    • Max sensor voltage: 2.5VDC
    • Standard lead length: 200mm
  • SMD PTCs as Thermal Switches

    The TPM series of SMD PTC thermistors are frequently used as thermal switches in electronic circuits.

    • Temperature switch points: 65°C to 135°C
    • Available with several R25 (resistance at 25°C) values
    • Max Voltage: 30VDC
  • PTCs as Resettable Current Fuses

    Ceramic PTC re-settable current fuses offer several benefits over conventional fuses by effectively limiting the through current.

    • A range of 120ºC trip available
    • Max voltage: 270VDC
  • PTC Elements as Self-Regulating Heaters

    PTC thermistor can operate as a self-regulating heater by varying resistance with temperature.

    • Range of Tc devices available between 30°C and 240°C
    • Voltages between 24V to 240V (DC)
  • SKTY Sensors - Linear PTC Elements

    The SKTY series of linear PTC sensing elements offers replacements for the once common KTY temperature sensors. These linear PTCs are sometimes known as PTC1000 or PTC2000 sensors.

    • R25 values of 1k ohms and 2k ohms available
    • R25 tolerance ±1% at 25°C
    • Operating temperature range: -50°C to +150°C