Thermistor

What is a thermistor symbol?

A thermistor symbol represents a temperature-dependent resistor in a circuit diagram. It shows a resistor element with a diagonal line and a temperature indicator, identifying it as a component whose resistance changes with temperature. This distinguishes it from fixed or variable resistors during circuit design and analysis.

What are the types of thermistor symbols used in schematics?

There are two main thermistor symbols: one for NTC thermistors (negative temperature coefficient - resistance decreases with temperature) and one for PTC thermistors (positive temperature coefficient - resistance increases with temperature). Each has slight variations in the line or marking on the resistor symbol to indicate the temperature relationship.

What is the difference between the thermistor circuit symbol and a resistor symbol?

While both share a base resistor shape, the thermistor symbol includes a diagonal line or temperature indicator to show that its resistance varies with temperature, whereas a standard resistor symbol represents a fixed resistance value.

What are common applications for thermistors in circuit diagrams?

Thermistor symbols appear in circuits for motor protection, HVAC systems, battery management, and electronic temperature sensors. They indicate components used for temperature monitoring, thermal feedback, or automatic temperature compensation.

Where can I find the thermistor symbol in a schematic symbol library?

The thermistor symbol is available in the Capital X Panel Designer's stencils, where it can be added directly to circuit drawings.

You can use Capital X Panel Designer to quickly insert a thermistor schematic symbol into your design, saving time and ensuring symbol consistency. With this electrical CAD software at your disposal, you will boost your productivity and workflow speed and reduce the tedium involved.

Can I preview the thermistor symbol image before inserting it into my design?

Yes. The thermistor symbol image can be previewed in the schematic symbol library within Capital X Panel Designer before adding it to your circuit diagram.

Learn more about how to create custom electrical symbols.