Thermistor symbol

Posted on 2006-05-29
Last Modified: 2008-01-09
I've seen 2 different (but very similar) drawings for the thermistor.

Here's one:

In this one, the flat line is above the resistor component, but on others, it's below.

I'm guessing which one it is, indicates whether or not it has a PTC or an NTC.

Is the one in the above image a PTC or NTC?

Question by:InteractiveMind
    LVL 18

    Accepted Solution

    There isn't a difference in the symbol of a PTC and NTC thermistor.
    If there were the diagram would do a different thing if you read it upside down.
    LVL 27

    Expert Comment

    There is no symbol which EVERYBODY uses for a thermistor. The one you showed is quite common. Another is the usual resistor symbol enclosed in a circle with a T placed inside.
    LVL 25

    Author Comment


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