wibre electrical components Germany wibre model wibre price

wibre electrical components are accessory products used to achieve electrical connections, categorized industrially as connectors. As industrial automation levels rise and industrial control requirements become increasingly strict and precise, the usage of terminal blocks is gradually increasing. With the development of the electronics industry, the scope of application for terminal blocks is expanding, and their varieties are becoming more diverse. Besides PCB board terminals, the most widely used types include hardware terminals, nut terminals, spring terminals, and so on.

wibre electrical component structure

1. The cathode of an electron tube is the component used to emit electrons, divided into oxide cathodes and thoriated tungsten carbide cathodes. Generally, oxide cathodes are indirectly heated; they use a specialized filament to heat the cathode body coated with barium oxide, etc., for thermionic emission. Thoriated tungsten carbide cathodes are generally directly heated; thermionic emission is produced simply by heating, so they serve as both the filament and the cathode. Theoretically, thoriated tungsten carbide cathodes have a much longer lifespan than oxide cathodes. Thoriated tungsten carbide cathodes are most widely used in high-power transmitting tubes, while oxide cathodes are generally used in transmitting tubes with an output power below 1kW. Mesh cathodes are made into a cylindrical shape using thinner thoriated tungsten wires. Their advantages are: (1) Since they are woven from many thoriated tungsten wires, they have a higher permeance coefficient. (2) It is easier to achieve a smaller cathode-grid spacing, which helps improve transconductance. (3) Since the filament has a mesh structure, the current in each individual filament wire is smaller, the local magnetic field is weaker, and thus the hum generated by the cathode current is also smaller. 2. The grids of an electron tube are divided into first grid and second grid based on their roles within the tube, sometimes also referred to as the control grid and screen grid. The main function of the first grid is to control the cathode current, while the function of the second grid is to shield the first grid from the influence of the plate. The grid structure relates to its own mechanical strength and heat dissipation effectiveness, which determines whether the tube can operate stably. To reduce electron transit time, the grid-cathode spacing is made very short, even less than 1mm, so manufacturers often use materials with high mechanical strength, high thermal conductivity, good emissivity, and high melting point to make the grids, to avoid thermal shorting between electrodes at such small spacings. The first and second grids must be strictly aligned, so that the screen grid captures fewer electrons, reducing screen grid dissipation, improving current distribution, and enhancing linearity. 11. The anode of an electron tube is the electrode that collects most of the electrons emitted by the cathode. During operation, due to electron bombardment of the plate surface and thermal radiation from other electrodes, a large amount of heat energy is generated at the plate. Since the power dissipation density of the plate is tens to hundreds of watts per square centimeter, natural radiation or conduction cooling is no longer sufficient for such high power densities. Therefore, forced cooling methods must be employed. Common methods include air cooling, water cooling, and evaporative cooling.

wibre electrical component features

Solid-state relays are contactless electronic switches with isolation functionality. They have no mechanical contact parts during switching. Therefore, in addition to having the same functions as electromagnetic relays, solid-state relays also feature logic circuit compatibility, resistance to vibration and mechanical shock, unrestricted installation positions, good moisture-proof, mold-proof, and corrosion-resistant performance, excellent performance in explosion-proofing and preventing ozone pollution, low input power, high sensitivity, low control power, good electromagnetic compatibility, low noise, and high operating frequency. Solid-state relays have no internal mechanical parts and adopt a potting fully sealed structure. Therefore, solid-state relays offer advantages such as vibration resistance, corrosion resistance, long life, and high reliability. AC solid-state relays adopt zero-crossing triggering technology, have short switching times, and can be applied in higher frequency occasions. Optical isolation is used between the input and output circuits, resulting in very low input power consumption. The output end has protection circuits and strong load capacity.

wibre electrical component composition

1. Generally, a fuse consists of three parts: First is the fusible element part, 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 elements must have the same material, identical geometric dimensions, resistance values that are as small and consistent as possible, and most importantly, consistent fusing characteristics. Household fuses are commonly made of lead-antimony alloy. Second is the electrode part, usually consisting of two electrodes. It is an important component connecting the fusible element to the circuit. It must have good electrical conductivity and should not produce significant installation contact resistance. Third is the holder part. The fusible element of a fuse is generally thin and soft. The role of the holder is to fix the fusible element and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy. During use, phenomena such as breakage, deformation, combustion, and short circuits should not occur. 2. Arc extinguishing device: Fuses used in power circuits and high-power equipment not only have the three general parts of a fuse but also include an arc extinguishing device. This is because the circuits protected by such fuses not only have larger operating currents, but also have very high voltages across the terminals when the fusible element melts. Often, the fusible element has melted (fused) or even vaporized, but the current has not been cut off. The reason is that arcing occurs between the two electrodes of the fuse under the action of voltage and current at the moment of fusing. This arc extinguishing device must have strong insulation and good thermal conductivity, and exhibit negative electronegativity. Quartz sand is a commonly used arc extinguishing material. 10. Fusing indication device: Some fuses have a fusing indication device. Its function is to cause a certain visual change in the fuse itself after it operates (fuses), making it easy for maintenance personnel to detect, such as glowing, changing color, or popping out a solid indicator.

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