H81K74BYA

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Through Hole Resistors

Through Hole Resistors (THRs) are electrical components used in electronic devices to restrict the flow of electric current, thereby producing a defined electrical resistance value or voltage. The most popular type of through hole resistor is a thick-film resistor with two or three terminal connections and one or more resistive elements. This type of resistor comprises a ceramic substrate that has been infiltrated with a conductive material or has a dielectric impregnated with a resistive material.

The resistance value of a THR is specified by two resistive elements that are made up of two separate electrodes in close contact with the ceramic material. When a current is applied to the THR, the current is divided and flows through each of the resistive elements. This produces a voltage drop in each element which is related to its resistance value. The total resistance of a THR is the sum of the resistive elements.

H81K74BYA application field and working principle

The H81K74BYA is a through hole resistor (THR) used in electronic circuits to limit or provide electrical resistance. This resistor is ideal for applications where high power, high voltage and high operating temperatures are required. It is constructed from a ceramic material and has a low thermal resistance, which gives it the capability to handle up to 30 W of continuous power. The device also features a low-inductance design, which minimizes voltage spikes and allows it to operate at frequencies up to 10 MHz.

The H81K74BYA has two adjustable electrodes which can be used to adjust the resistance value of the THR. These electrodes are connected to respective terminals on the device and each has a finely adjustable resistance value which can be changed to adjust the overall resistance of the device. The resistance of the THR can also be modified by changing the dielectric material in the ceramics or by changing the number of resistive elements within the device. The wattage of the THR is determined by the amount of current flowing through it, the amount of voltage applied to it and the total resistance of the THR.

The H81K74BYA THR is suitable for a wide range of applications including motor controls, rectifiers, heating systems and SMPS power supplies. It is highly reliable and stable with a high power-to-volume ratio, making it ideal for use in high-power applications. The THR is also very easy to install and is designed to be mounted in a through hole manner onto a printed circuit board.

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