TRQ electrical components Germany TRQ model TRQ price

TRQ electrical component is a semiconductor triode, also known as a bipolar junction transistor or crystal triode. It is a semiconductor device that controls current. Its function is to amplify weak signals into electrical signals with larger amplitudes, and it is also used as a contactless switch. The triode is one of the basic semiconductor components, featuring current amplification capability, and is a core component in electronic circuits. A triode is formed by creating two closely spaced PN junctions on a single semiconductor substrate. These two PN junctions divide the entire semiconductor into three parts: the base region in the middle, and the emitter and collector regions on either side. The configurations include PNP and NPN.

TRQ electrical component structure

1. The cathode of an electron tube is the component used to emit electrons, classified into oxide cathodes and thoriated tungsten carbide cathodes. Generally, oxide cathodes are indirectly heated; they use a dedicated 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 generated 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 typically used in transmitting tubes with output power below 1kW. Mesh cathodes are made into cylindrical shapes 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) Due to the mesh structure of the filament, the current in each individual filament wire is small, resulting in a weaker local magnetic field, thereby reducing the hum generated by the cathode current. 2. The grids of an electron tube are classified into first grid and second grid based on their functions within the tube, sometimes also referred to as 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 (anode). The grid structure affects its mechanical strength and heat dissipation performance, 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. Therefore, manufacturers often use materials with high mechanical strength, high thermal conductivity, good radiation coefficient, 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. 10. The anode (plate) 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 is generated at the plate. Since the power dissipation density of the plate ranges from tens to hundreds of watts per square centimeter, natural radiation or conduction cooling is insufficient for such high power densities. Therefore, forced cooling methods must be employed. Common methods include air cooling, water cooling, and evaporative cooling.

TRQ electrical component performance

1. Protection characteristics: When the surge intensity from the surge source does not exceed the specified value, the clamping voltage of the varistor must not exceed the impulse withstand voltage that the protected object can endure. 2. Surge withstand characteristics: The varistor itself must be able to withstand the specified surge current, surge energy, and the average power when multiple surges occur sequentially. 3. Life characteristics include two aspects: one is the continuous operating voltage life, meaning the varistor should reliably operate for a specified duration (in hours) under specified ambient temperature and system voltage conditions; the other is the surge life, meaning it can reliably withstand a specified number of surge impacts. 7. After the varistor is integrated into the system, in addition to providing "safety valve" protection, it introduces some additional effects, known as "secondary effects," which should not degrade the normal operating performance of the system. The main factors to consider are three: first, the inherent capacitance of the varistor; second, the leakage current under system voltage; and third, the influence of the varistor's nonlinear current coupling through the source impedance on other circuits.

TRQ electrical component classification

Generator classifications include: (1) Generators are divided into DC generators and AC generators; (2) AC generators are divided into synchronous generators and asynchronous generators (rarely used); (3) AC generators can also be divided into single-phase generators and three-phase generators. There are many types of generators. Principally, they are divided into synchronous generators, asynchronous generators, single-phase generators, and three-phase generators. By generation method, they are divided into steam turbine generators, hydroelectric generators, diesel generators, gasoline generators, etc. By energy source, they are divided into thermal power generators, hydroelectric generators, etc.

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