RWR81S2840FSB12

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Through Hole Resistors, also known as "THR(s)", are electronic components that are used to modify or control the transfer of a signal. The most common type of THR is the RWR81S2840FSB12, which is a type of Carbon Composition Resistor. This type of resistor utilizes a carbon composition material, with fixed value resistor elements processed as a batch, which provides superior long-term stability and performance.

The most common application field of the RWR81S2840FSB12 is in the power supply circuits, especially in the voltage stabilizing circuits. It is also used in voltage dividing circuits, as a load-balancing component when circuit elements need to be adjusted. Other than that, it is also used in temperature compensation circuits, resistive elements in frequency circuits, and as a current limiting component.

Most THR resistors are designed with four leads, with two leads connecting to one side of the resistor and the other two going to the other side. In the RWR81S2840FSB12 THR, it is designed with a single continuous coil of resistive material sandwiched between two metal plates. The metal plates act as termination points, establishing electrical connections to the entire resistive element. The metal plates are connected to the leads, which are then used to carry the current passing through the resistor.

The working principle of the RWR81S2840FSB12 THR is extremely simple. When current flows through the resistor, the resistance of the material creates a voltage drop across the resistor. The magnitude of the voltage drop depends on the magnitude of the current and the resistance of the element. This is known as Ohm\'s law, and is usually expressed as V = I · R. Therefore, by adjusting the resistance value of the THR, and thus the voltage drop, the magnitude of the current can be regulated or changed.

THR resistors, such as the RWR81S2840FSB12, are extremely reliable components that are available in a wide variety of resistance and wattage values. They are extremely stable and can operate in temperatures up to 120°C (248°F). THR resistors are also very cost-efficient, so they are ideal for most power supply circuits.

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