PTC Thermistors (Motor Protectors, PTC Resistors)

 

PTC Thermistor, Motor Protectors, PTC ResistorsPTC thermistors from Calco Electric are used to detect both increases and decreases in temperature in a variety of settings. PTC thermistors are also known as motor protectors, PTC resistors, or motor protection sensors.

Precise & Accurate Measurements

Thermistors (a word combining thermal and resistor) are negative coefficient resistors that measure and control specific temperatures. Thermistors are more accurate than standard resistors because they only measure specific ranges of heat or cool, making them more precise than general resistors.

Thermistors contain two-terminal electrical elements that can reduce the flow of electricity without changing the voltage levels running different circuits. They are used in a variety of applications:

  • Inrush current limiters
  • Self-resetting overcurrent protectors
  • Temperature sensors (like Negative Temperature Coefficient or NTC)
  • Self-regulating heating elements (like Positive Temperature Coefficient or PTC)

If a thermistor measures a rise in temperature, the resistance increases along with the temperature, creating a positive temperature coefficient (PTC) thermistor, unlike a negative temperature coefficient (NTC) thermistor, which decreases resistance with an increasing temperature.

PTC thermistors increase resistance against rising temperatures, effectively protecting products and systems from overcurrent conditions. Typically, PTC thermistors are used in resettable fuse installments. They are made from polymer or ceramic instead of pure metals; polymers and ceramics are much more accurate because they only measure a specific range of temperatures.

PTC Thermistors at Calco Electric

To find a PTC Thermistor for your specific needs, contact Calco Electric today. We are eager to help you find the right product for you!

download pdf

Download PTC Thermistors PDF

 

Thermostats & Thermal Cutouts:

A thermostat is a component of a control system which senses the temperature of a system so that the system's temperature is maintained near a desired setpoint. The thermostat does this by switching heating or cooling devices on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. (Wikipedia)

ASR 44 - ASR Self Hold Thermal CutoutSelf Hold Thermal Cutout: ASR 44


 

ASR 44G - ASR Self Hold Thermal CutoutSelf Hold Thermal Cutout | ASR 44G


self hold bimetal thermostat Bimetal Open Frame/Self Hold Thermostat: AMT-P1 Series


Temperature Control

HB-2 1/2" Snap Action Bimetal Disc Thermostat


Disc ThermostatsJUC 31F Series TO-220 PCB-Bimetal Disc Thermostat


KSD307

KSD307-T: Self-hold 1/2” Disc PTC Thermal Cut-out


Bimetal Thermostat HB-5 Series Narrow Differential Bimetal Thermostat


Creep Action ThermostatHB-7 3/4" Snap Action Bimetal Disc Thermostat


high precision thermostat MQT Series High Precision & Long Life Thermostats


JRMD Series ThermostatsJRMD Creep Action Thermostats