What is a tempco resistor?

A resistor whose resistance varies in a predictable way with temperature. Such a resistor is used in some analog synth circuits, particularly exponential converters, to compensate for variations in the circuit’s behavior caused by changes in the ambient temperature. (“Tempco” is short for “temperature compensation”.)

Is a thermistor a resistor?

A thermistor is a resistance thermometer, or a resistor whose resistance is dependent on temperature. The term is a combination of “thermal” and “resistor”. With an NTC thermistor, when the temperature increases, resistance decreases. Conversely, when temperature decreases, resistance increases.

Are resistors PTC or NTC?

Simply put, thermistors are resistors whose resistance varies with temperature. Those that decrease are known as negative temperature coefficient (NTC) thermistors, while those that increase are positive temperature coefficient (PTC) thermistors.

What type of resistor is used as a thermistor?

A thermistor is a type of resistor whose resistance is strongly dependent on temperature, more so than in standard resistors. The word is a combination of thermal and resistor….Thermistor.

How do you measure the resistance of a thermistor?

As with any resistor, you can use the ohmmeter setting on your multimeter to measure thermistor resistance. The resistance value displayed on your multimeter should correspond to the ambient temperature near the thermistor. The resistance will change in response to temperature change.

Is PTC a thermistor?

PTC thermistors are temperature-dependent resistors based on special semiconductor ceramics with a high positive temperature coefficient (PTC). They exhibit relatively low resistance values at room temperature. With this property, PC thermistors are used as overcurrent protection devices.

What are PTC and NTC type of thermistor?

An NTC, or negative temperature coefficient, thermistor’s resistance value decreases as the temperature increases. PTC thermistors are unique in that they act similarly to NTC thermistors with the resistance dropping as temperature increases until the Curie or switching temperature is met.

How does temperature affect thermistor resistors?

You can see how the resistance of the thermistor decreases with an increase of temperature. If this was a chart for a resistor, the “curve” would actually be a vertical line; the resistance value would not change no matter the temperature. Resistors are great for use in electronics, for example, because of this stable characteristic.

What is the difference between NTC and PTC thermistor?

Thermistors are of two opposite fundamental types: With NTC thermistors, resistance decreases as temperature rises. An NTC is commonly used as a temperature sensor, or in series with a circuit as an inrush current limiter. With PTC thermistors, resistance increases as temperature rises.

What is a negnegative Temperature Coefficient thermistor?

Negative Temperature Coefficient (NTC) NTC thermistors are the most common type available for use. The defining characteristic of this thermistor is that its resistance decreases as temperature increases. These sensors are found widespread throughout the HVAC industry, product manufacturing, transportation, appliances, and many other sectors.

What are the different types of thermistors?

There are many different types of thermistors but they all work on the same principle: variable resistance based on temperature. There are basically two categories of thermistors of which all types fall under; NTC and PTC. Depending on your particular application you may opt for one thermistor over another.