1. Fuse resistor: also known as fuse resistor, plays the dual role of resistance and fuse under normal circumstances, when the circuit fails and its power exceeds the rated power, it will blow like a fuse to disconnect the connecting circuit. The fuse resistor generally has a small resistance value (0.33Ω~10KΩ) and a small power. The common models of fuse resistors are: RF10 type, RF111-5 fuse resistor symbolic type, RRD0910 type, RRD0911 type, etc.
2. Sensitive resistor: refers to its resistance value for a certain physical quantity (such as temperature, humidity, light, voltage, mechanical force, and gas concentration, etc.) has sensitive characteristics, when these physical quantities change, the resistance value of the sensitive resistance will change with the change of physical quantity, showing different resistance values. According to the sensitivity to different physical quantities, sensitive resistors can be divided into thermal, humid, photosensitive, varistor, force-sensitive, magnetic and gas-sensitive. The materials used in sensitive resistors are almost all semiconductor materials, and these resistors are also known as semiconductor resistors.
The resistance of a thermistor changes with temperature, and the resistance to increase temperature is a negative temperature coefficient (NTC) thermistor. The most widely used is the negative temperature coefficient thermistor, which can be divided into ordinary negative temperature coefficient thermistor, voltage stabilized negative temperature coefficient thermistor, temperature measurement type negative temperature coefficient thermistor, etc. A photoresistor is a resistance that changes with the intensity of the incident light
When the beam is enhanced, the photoresistor decreases, and when the incident light is weakened, the resistance value increases.