WEIDMLLER electrical components, Germany WEIDMLLER models, WEIDMLLER prices

WEIDMLLER electrical components are current fuses that provide overload protection. When a circuit fault or abnormality occurs, the current continues to rise. This rising current may damage certain important components in the circuit, burn out the circuit, or even cause a fire. If a fuse is correctly installed in the circuit, it will melt and cut off the current when the current abnormally rises to a certain level and temperature, thereby protecting the safe operation of the circuit. With the fuse correctly installed in the circuit, the fuse will melt and cut off the current when the current abnormally rises to a certain level and temperature, protecting the safe operation of the circuit. The fuse invented by Edison was used to protect the then-expensive incandescent lamps. With the development of the times, fuses protect power equipment from damage due to overcurrent and overheating, avoiding serious damage to electronic equipment caused by internal faults.

WEIDMLLER electrical component applications

PN junction photodiodes, like other types of photodetectors, are widely used in devices such as photoresistors, charge-coupled devices, and photomultiplier tubes. They can output corresponding analog electrical signals based on the illuminance of the received light or switch between different states in digital circuits. Photodiodes are also applied in consumer electronics, such as CD players, smoke detectors, and infrared remote control devices for televisions and air conditioners. For many applications, photodiodes or other photoconductive materials can be used. They are often used for light measurement, frequently operating in camera exposure meters and automatic brightness adjustment for street lights. All types of optical sensors can be used to detect sudden illumination or to detect light emission within the same circuit system. Photodiodes are often combined with light-emitting devices to form a module, commonly known as an optocoupler. This allows the analysis of the motion of external mechanical components by analyzing the received light conditions. Another function of photodiodes is to act as an intermediary between analog and digital circuits, allowing the two circuit sections to be coupled via optical signals, which improves circuit safety. In scientific research and industry, photodiodes are often used for precise light intensity measurement because they have better linearity than other photoconductive materials. In medical application equipment, photodiodes are also widely used, such as in X-ray computed tomography and pulse detectors. PIN junction photodiodes are generally not used to measure very low light intensities. If high-sensitivity detectors are required under weak light conditions, avalanche photodiodes, charge-coupled devices, or photomultiplier tubes can play a role, such as in astronomy, spectroscopy, night vision equipment, laser rangefinders, and other applications.

WEIDMLLER electrical component classification

1, fusible resistors: Also known as fuse resistors, they serve the dual function of a resistor and a fuse under normal conditions. When a circuit fault causes their power to exceed the rated power, they melt like a fuse, disconnecting the connected circuit. Fusible resistors generally have small resistance values and low power ratings. 7, sensitive resistors: These refer to resistors whose resistance values are 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 changes accordingly, presenting different resistance values. Based on sensitivity to different physical quantities, sensitive resistors can be classified into thermistors, humidity-sensitive resistors, photoresistors, varistors, force-sensitive resistors, magnetoresistors, and gas-sensitive resistors. The materials used for sensitive resistors are almost all semiconductor materials, so these resistors are also called semiconductor resistors. The resistance of a thermistor changes with temperature; a negative temperature coefficient (NTC) thermistor has a resistance that decreases as temperature rises. NTC thermistors are widely used and can be further divided into standard NTC thermistors, voltage-stabilizing NTC thermistors, and temperature-measuring NTC thermistors. A photoresistor's resistance changes with the intensity of incident light; when incident light increases, the resistance of the photoresistor decreases, and when incident light weakens, the resistance value increases.

WEIDMLLER electrical component types

For different application scenarios, the purpose of using varistors varies, and the voltage/current applied to the varistor is not the same, so the requirements for the varistor also differ. Distinguishing these differences is crucial for correct usage. Based on the purpose of use, varistors can be divided into two main categories: (1) protection varistors and (2) circuit function varistors. Protection resistors: (1) Distinguish whether the varistor is for power supply protection or for signal line and data line protection, as they must meet different technical standard requirements. (2) Based on the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into AC type and DC type. The aging characteristics of varistors under these two voltage stresses are different. (3) Based on the different abnormal overvoltage characteristics withstandable by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression varistors refer to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. 2. High-power varistors refer to varistors used to absorb periodic continuous pulse groups, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, the average power is quite high. 5. High-energy varistors refer to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For these applications, the main technical indicator is energy absorption capacity. The protective function of varistors can be repeated multiple times in most application scenarios, but sometimes they are made into "one-time" protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

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