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PTC (positive temperature coefficient )thermistor switches at one
particular temperature. Making use of the characteristics that the
resistance of PTC thermistor increases sharply above curie
temperature, when ambient temperature increases abnormally,
protective circuit installed PTC thermistor will turn on or cut off
loop through resistance changing, achieving thermal protection
purpose. PTC thermistor protect such equipment and components as
motors, transformers, power transistors and thyristors against
over-temperature. A PTC thermistor is less expensive than a
thermostat, and its switch temperature can be more accurately
specified. It is also smaller and easier to design-in to electronic
circuitry. Therefore PTC thermistor can be ideal devices for
temperature detection, monitoring, indicating, limiting and over
(excessive) temperature protection.
Typical Application of PTC Thermistor for Temperature Protection
and temperature limiting sensors
·Limit temperature measurement of Industrial electronics
application.
·Power supplies, switch power supply.
·Home appliances, such as dish washers, washing machines, ironing
machines, electric cookers, etc.
·Electronic data processing and communications engineering (DC/DC
converters).
·Motor windings overheating Protection.
·Automotive electronics.
·Semiconductor heatsinks, enclosure panels, temperature-limited
transistors.
·Lighting applications.
Features of PTC Thermistor for Temperature Protection and
temperature limiting sensors
·2 Outlook construction: A-radial leaded epoxy resin coated form,
B-metal tag lug form, .
·PTC Thermistor Protection temperature: *0~**0℃
·Quick response.
·Long stability.
·Small dimension, convenient for installation.
·Do not need to be reset after protection.
