johnson electric electrical components Germany johnson electric models johnson electric prices

johnson electric electrical components refer to an electrical device that disconnects the circuit by melting the fusible element with the heat generated by itself when the current exceeds the specified value. A fuse is a current protection device made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself melts the fusible element, thereby disconnecting the circuit. Fuses are widely used in high- and low-voltage distribution systems, control systems, and electrical equipment as protectors against short circuits and overcurrent, making them one of the most commonly used protective devices. It uses a metal conductor as the fusible element connected in series in the circuit; when overload or short-circuit current passes through the fusible element, it melts due to its own heating, thereby breaking the circuit. The fuse has a simple structure and is easy to use, and is widely used as a protective device in power systems, various electrical equipment, and household appliances.

johnson electric electrical component classification

For most conductors, at a certain temperature, their resistance remains almost constant at a fixed value; this type of resistance is called linear resistance. The resistance of some materials changes significantly with current (or voltage), and their volt-ampere characteristic is a curve; this type of resistance is called nonlinear resistance. For a nonlinear resistor under a given voltage (or current), the ratio of voltage to current is the static resistance at that operating point, and the slope on the volt-ampere characteristic curve is the dynamic resistance. The expression of nonlinear resistance characteristics is relatively complex, but these nonlinear relationships are widely applied in electronic circuits.

johnson electric electrical component features

1. High sensitivity; 2. Geometric shape has multi-faceted adaptability, allowing fiber optic sensors to be made in any shape; 3. Can manufacture devices that sense various physical information (sound, magnetism, temperature, rotation, etc.); 4. Can be used in high voltage, electrical noise, high temperature, corrosion, or other harsh environments; 7. And has inherent compatibility with fiber optic telemetry technology. The advantage of fiber optic sensors compared to traditional various sensors is that fiber optic sensors use light as the carrier of sensitive information and optical fiber as the medium for transmitting sensitive information, possessing the characteristics of optical fiber and optical measurement, with a series of unique advantages. Good electrical insulation performance, strong anti-electromagnetic interference ability, non-intrusive, high sensitivity, easy to realize long-distance monitoring of measured signals, corrosion-resistant, explosion-proof, optical path flexibility, and convenient connection to computers. Sensors are developing towards sensitivity, precision, strong adaptability, compactness, and intelligence. They can serve as human eyes and ears in places inaccessible to humans (such as high-temperature areas or areas harmful to humans, such as nuclear radiation zones), and can even surpass human physiological limits to receive external information that human senses cannot perceive.

johnson electric electrical component features

1. The function of a varactor diode is to utilize the principle of variable capacitance between PN junctions to create a semiconductor device, used as a variable capacitor in high-frequency tuning, communication, and other circuits. Varactor diodes belong to reverse-biased diodes; changing the reverse bias on its PN junction changes the PN junction capacitance. The higher the reverse bias, the lower the junction capacitance; the relationship between reverse bias and junction capacitance is nonlinear. 3. Diagram of the relationship between varactor diode capacitance value and reverse bias value: (a) Increased reverse bias causes decreased capacitance; (b) Decreased reverse bias causes increased capacitance. The capacitance tolerance range is a specified capacitance range for a varactor diode. Datasheets will display minimum, nominal, and maximum values, which are often plotted on graphs.

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