I found this symbol in a vendor circuit diagram. What does it mean? It looks like they are trying to convey some sort of limiting.
It's a resistor symbol with a line over the top that has both the top and bottom ends flattened.
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Doing a google search of "Resistor Symbol" and then looking at images, I came across this.
According to the site, its a varistor tolerated symbol.
a: resistor , general symbol
b: resistor , tolerated symbol
c: resistor , un-standard symbol
d: resistor with variable resistance
e: resistor with mobile contact
f: resistor with mobile contact and stop position
g: potentiometer with mobile contact
h: potentiometer with mobile contact, general symbol
i: potentiometer with preset adjustment
j: two plugs resistor
k: shunt resistor
l: thermal resistor
m: thermistor general symbol
n: thermistor tolerated symbol
o: varistor general symbol
p: varistor tolerated symbol
It is better to use oficial symbols and not whatever gather from web.
Official Varistor symbol according to the IEEE "Graphic Symbols for Electrical and Electronics Diagrams" (IEEE std 315-1975) is the follow:
Please refere to the follow standards if you want to communicate and distribute your diagram