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A positive-temperature-coefficient heating element (PTC heating element), or self-regulating heater, is an electrical resistance heater whose resistance increases significantly with temperature. The name self-regulating heater comes from the tendency of such heating elements to maintain a constant temperature when supplied by a given voltage.
NTC thermistors are widely used as inrush-current limiters and temperature sensors, while PTC thermistors are used as self-resetting overcurrent protectors and self-regulating heating elements. An operational temperature range of a thermistor is dependent on the probe type and is typically between −100 and 300 °C (−148 and 572 °F).
The integrated circuit sensor may come in a variety of interfaces — analogue or digital; for digital, these could be Serial Peripheral Interface, SMBus/I 2 C or 1-Wire.. In OpenBSD, many of the I 2 C temperature sensors from the below list have been supported and are accessible through the generalised hardware sensors framework [3] since OpenBSD 3.9 (2006), [4] [5]: §6.1 which has also ...
With the PC industry rising from the 1980s in Taiwan, its NTC thermistor is adapted as the inrush current limiter in switched-mode power supply to suppress the inrush current when power supply turns on, and the varistor protects the circuit from damaged by surge current occasionally occurred in the electricity network.
They are similar in function to PTC thermistors in certain situations but operate on mechanical changes instead of charge carrier effects in semiconductors. These devices were first discovered and described by Gerald Pearson at Bell Labs in 1939 and described in US patent #2,258,958.
Thermistor – Resistor whose resistance changes with temperature, up PTC or down NTC; Resistance Temperature Detector (RTD) – Wire whose resistance changes with temperature; Bolometer – Device for measuring the power of incident electromagnetic radiation; Thermal cutoff – Switch that is opened or closed when a set temperature is exceeded
PTC Typ: 201 NTC Typ: 101 NTC Typ: 102 NTC Typ: 103 NTC Typ: 104 NTC Typ: 105 −50 79.901192 80.31 803.1 1032 −45 81.925089 82.29 822.9 1084 −40 83.945642 84.27 842.7 1135 50475 −35 85.962913 86.25 862.5 1191 36405 −30 87.976963 88.22 882.2 1246 26550 −25 89.987844 90.19 901.9 1306 26083 19560 −20 91.995602 92.16 921.6 1366 19414 14560
This page was last edited on 25 June 2023, at 14:27 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
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