On a 6-ring resistor, the last color ring displays the variation of resistance with temperature
A varistor is a passive component whose resistance changes significantly with voltage,
Fast Response Time: The response time of a varistor is typically in the nanosecond range,
There are several points to note when using varistors
Crossover resistor, commonly referred to as 0 ohm resistor or zero ohm resistor,
Circuit design flexibility: During the circuit design phase,