PTC Thermistor Application Case

July 30, 2021

PTC Thermistor Application Case

Thermistor is a type of sensitive element, its resistance value will show a step change with the temperature of the thermistor body, and it has semiconductor characteristics.


Thermistors are divided into different temperature coefficients: positive temperature coefficient thermistor (abbreviated as PTC thermistor) negative temperature coefficient thermistor (abbreviated as NTC thermistor)

 

PTC Thermistor Application Case
PTC Application Resistance-temperature characteristics Volt-Ampere Characteristics Current-time characteristics
Temperature sensing Temperature compensation Overcurrent protection Constant temperature heating Warm air heating Automatic degaussing Motor start Delay start
Color TV   ● ●     ●    
Color display     ●     ●    
Program Control Exchange ●   ●          
Energy-saving lamps               ●
Electric mosquito repellent       ●        
Household heater ●     ● ●      
Communication machine   ● ●          
refrigerator             ●  
Air conditioning         ●   ●  
transformer     ●          
Audio equipment ● ● ●          
Massage chair     ●          
Cold storage ●     ●        
shoes dryer       ●        
Dehumidifier         ●   ●  
Electric fan             ●  
Rice cooker ●     ●        
Electric shoe       ●        
Electric hot plate       ●        
Dryer ●       ●   ●  
Clothes dryer         ●   ●  
Heating machine ●     ● ●   ●  
Intravenous heating       ●        
Lightweight plastic sealing machine       ●        
Car low temperature starter       ●        
Steam generator       ●        
Car fuel heater       ●        
humidifier       ●        
hair curler       ●        
hair dryer       ●        
Acupuncture         ●      
Power failure protector               ●
DVD player   ● ●          
Copier ●     ●        
Train conservatory         ●   ●  
vending machine ●   ● ● ●   ●  
car ●   ● ● ●     ●
Washing machine     ●         ●
Sweeper   ● ●         ●
Transistor     ●          
Fluorescent lamp     ●          
computer   ● ●          
Motor starter     ●       ●  
Fire alarm ● ●            
Thermometer ●              
Level gauge ●              
Car heater       ●        
Car incubator       ●        
Hot air curtain       ●        
Hand warmer       ●        
Tea dryer       ●        
Water pipe heater       ●        
Travel clothes hanger       ●        
Fan protection regulator ●   ●          
Automatic door motor protector     ●          
Car paint room       ●        
Bath heater       ●        
Liquefied gas cylinder heater       ●        
shower       ●        
Beauty container       ●        
Electric heating table       ●        
Electronic starter ●             ●
Baby bottle thermostat       ●        
Electric heating bag       ●        
Hot treasure       ●        
Car heating cup       ●        
Electric moxibustion device ●     ●        
Yogurt thermostat cup       ●        
Hot compress ●     ●        
Electric iron       ●        
Electric thermos       ●        
Infusion controller ● ●           ●
Power saving switch ●             ●
Young poultry and livestock insulation board       ●        
Electric hip flask       ●        
Electric blanket ●     ●        
Health heat pad       ●        

 

PTC is the abbreviation of Positive Temperature Coefficient, which means positive temperature coefficient, and generally refers to semiconductor materials or components with a large positive temperature coefficient.
Usually we refer to PTC refers to the positive temperature coefficient thermistor, referred to as PTC thermistor.


PTC thermistor is a typical temperature-sensitive semiconductor resistor. When it exceeds a certain temperature (Curie temperature), its resistance value increases stepwise as the temperature rises.

PTC thermistors are classified according to their materials: ceramic PTC thermistors and organic polymer PTC thermistors

 

A large number of PTC thermistors are currently used

☞ PTC thermistors for constant temperature heating

☞ PTC thermistors for Low voltage heating

☞ PTC thermistors for air heating

☞ PTC thermistors for overcurrent protection

☞ PTC thermistors for overheat protection

☞ PTC thermistors for delayed start

Under normal circumstances, organic polymer PTC thermistors are suitable for overcurrent protection, and ceramic PTC thermistors can be used for the various purposes listed above.