Resistor Special Resistor

1. Insurance resistor: also known as a fuse resistor, it plays a dual role of resistance and fuse under normal circumstances. When a circuit malfunctions and its power exceeds the rated power, it will blow like a fuse, causing the connected circuit to disconnect. The resistance value of fuses is generally small (0.33 Ω~10K Ω), and the power is also small. The commonly used models of fuse resistors include RF10 type, RF111-5 symbol type of fuse resistors, RRD0910 type, RRD0911 type, etc.
2. Sensitive resistor: refers to its resistance value that is sensitive to certain physical quantities (such as temperature, humidity, light, voltage, mechanical force, and gas concentration). When these physical quantities change, the resistance value of the sensitive resistor will change with the physical quantity, presenting different resistance values. According to their sensitivity to different physical quantities, sensitive resistors can be divided into types such as thermal sensitive, humidity sensitive, photosensitive, pressure sensitive, force sensitive, magnetic sensitive, and gas sensitive resistors. The materials used in sensitive resistors are almost all semiconductor materials, which are also known as semiconductor resistors.
The resistance value of a thermistor changes with temperature, and the resistance increases with temperature, resulting in a negative temperature coefficient (NTC) thermistor. The most commonly used ones are negative temperature coefficient thermistors, which can be divided into ordinary negative temperature coefficient thermistors; Stable voltage negative temperature coefficient thermistor; Temperature measuring negative temperature coefficient thermistors, etc. A photosensitive resistor is a resistor whose resistance changes with the intensity of incident light. When the incident light increases, the photosensitive resistor decreases, and when the incident light weakens, the resistance value increases.