EPRADUR electrical components Germany EPRADUR model EPRADUR price

EPRADUR electrical component is a photodetector that converts light into current or voltage signals depending on the mode of use. The die often uses a photosensitive PN junction, which is highly sensitive to changes in light, has unidirectional conductivity, and changes its electrical characteristics with different light intensities, allowing the current in the circuit to be changed by varying the light intensity. Photodiodes are also called photoelectric diodes. Photodiodes are similar in structure to semiconductor diodes; their die is a photosensitive PN junction with unidirectional conductivity, so a reverse voltage must be applied during operation. Without illumination, there is a very small saturated reverse leakage current, known as dark current, at which point the photodiode is cut off. When exposed to light, the saturated reverse leakage current increases significantly, forming a photocurrent that varies with the intensity of the incident light. When light irradiates the PN junction, it generates electron-hole pairs within the PN junction, increasing the density of minority carriers. These carriers drift under reverse voltage, causing an increase in reverse current. Therefore, the current in the circuit can be changed by varying the light intensity.

EPRADUR electrical component features

Features self-diagnostic stable operating zone indication, promptly informing whether the operating status is reliable; through-beam, retro-reflective, and mirror-reflective photoelectric switches all have mutual interference prevention functions and are easy to install; settings at the control end allow pre-checking whether the photoelectric switch is working properly before operation. It can also receive interrupt or detection commands from a computer or programmable logic controller at any time; appropriate combination of external diagnosis and self-diagnosis enables intelligent photoelectric switches; fast response speed, capable of detecting tiny objects moving at high speed; adopts dedicated integrated circuits and advanced surface mount technology, offering high reliability; small size, light weight, simple installation and debugging, and includes short-circuit protection function.

EPRADUR electrical component function

When the distance between the observer or system and the wave source changes, the frequency of the approaching waves shifts; this phenomenon is called the Doppler effect. Sonar and radar are made based on the principle of this effect. The Doppler effect can be used to make ultrasonic proximity switches, microwave proximity switches, etc. When an object approaches, the reflected signal received by the proximity switch produces a Doppler frequency shift, thereby identifying whether an object is approaching. Proximity switches are widely used in aviation, aerospace technology, and industrial production. In daily life, they are used in automatic doors in hotels, restaurants, and garages, as well as in automatic hot air blowers. For security and anti-theft purposes, important locations such as archives, accounting departments, financial institutions, museums, and vaults are usually equipped with anti-theft devices composed of various proximity switches. In measurement technology, such as length and position measurement; in control technology, such as displacement, speed, and acceleration measurement and control, a large number of proximity switches are also used.

EPRADUR electrical component composition

1. A general fuse consists of three parts: first, the fusible element, which is the core of the fuse and serves to cut off the current when it melts; for fuses of the same type and specification, the fusible element must have the same material, identical geometric dimensions, as low and consistent resistance as possible, and most importantly, consistent fusing characteristics; household fuses are commonly made of lead-antimony alloy; second, the electrode part, usually two, which is an important component connecting the fusible element to the circuit, requiring good conductivity and no significant installation contact resistance; third, the holder part, since the fusible element of a fuse is generally thin and soft, the holder's role is to fix the fusible element and make the three parts a rigid whole for easy installation and use, requiring good mechanical strength, insulation, heat resistance, and flame retardancy, without breaking, deforming, burning, or short-circuiting during use. 2. Arc extinguishing device: Fuses used in power circuits and high-power equipment not only have the three parts of a general fuse but also an arc extinguishing device, because the circuits protected by such fuses not only have larger operating currents, but also high voltage across the terminals when the fusible element melts. Often, the fusible element may have melted (fused) or even vaporized, but the current is not cut off. The reason is that arcing occurs between the two electrodes of the fuse at the moment of fusing due to voltage and current. This arc extinguishing device must have strong insulation and good thermal conductivity, and be negatively charged. Quartz sand is a commonly used arc extinguishing material. 5. Fusing indicator device: Some fuses have a fusing indicator device, which causes a certain change in appearance after the fuse operates (melts), making it easy for maintenance personnel to detect, such as lighting up, changing color, or popping out a solid indicator.

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