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They are also used as timing devices in televisions. When the unit is switched on, the degaussing coil is
activated to eliminate the magnetic field; the thermistor automatically switches it off when the temperature
reaches a certain point. The Global Positive Temperature Coefficient (PTC) Thermistors Market is segmented
on the basis of type, applications, and region. On the basis of type, the global market is classified into Silistor,
Switching PTC Thermistor.
Silistor uses a semiconductor as its base material and it is characterized by a linear characteristic.
Accordingly, this type of device is used in temperature sensors. The silistor PTC thermistor is mostly
manufactured from incapacitated silicon. It exhibits a resistance / te mperature characteristic that is virtually
linear, the exact characteristic depending upon the semiconductor used and the level of doping.
Switching PTC Thermistor: is used in heaters, sensors and specialized versions are also used as resettable
fuses. Switching type NTC thermistors have a highly non-linear curve. The resistance at first falls with
increasing temperature, and then at a critical temperature the resistance increases intensely, thereby acting
virtually as a switch. On the basis of production technology, the global market is classified into Ceramic PTC
(Barium Titanate), Polymer PTC (Carbon Doped Polymer). On the basis of modes, the global market is
classified into Self Heating Mode, and Sensor Mode.
Self heating mode: in this mode current is passed through the thermistor, often in series with the item being
controlled. As it heats up as a result of the current, it reaches a point where the critical temperature is
reached and the resistance increases significantly. It can be used as a safety cut -out or regulator. Sensor
mode: in this mode, virtually no current is passed through the device and PTC thermistor senses the
surrounding temperature. The self-heating effect is negligible and it is only the surrounding temperature at
which point the resistance will significantly increase.
On the basis of application, the global market is classified into Audio-visual Equipment, Information
Equipment, Communication Equipment, Automobile Electronics, Home Electronics, Power Supply, Other.
Geographically, the global market is segmented into North America (U.S., Canada and Mexico), Europe
(Germany, France, England, Russia and Italy), Asia Pacific (China, Japan, Korea, India, and Southeast Asia),
South America, Middle East and Africa. The key players are TE, Polytronics, CYG Wayon, Littelfuse, Bourns,
Fuzetec, Sea & Land, Keter, Hollyland, TDK (EPCOS), VISHAY, Amphenol (GE SENSING), Jinke, MURATA,
Thinking, Uppermost, HIEL, HGTECH, and Hansor.
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