PNP7WVFT-91-3R

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Through Hole Resistors

Through hole resistors are passive two-terminal electrical components used to introduce electrical resistance into a circuit. While these components are available in several different styles, through hole resistors are the most common type used in commercial circuits. The PNP7WVFT-91-3R is a through hole resistor that is popular for its high-accuracy performance.

Application Field

The PNP7WVFT-91-3R is used in a variety of applications. It is especially useful in power supply and power management circuits, where its high accuracy makes it ideal for situations where power resilience and stability are paramount. It is also commonly used in industrial control and monitoring circuits, such as those used for motor speed control and process monitoring, as well as for the protection of circuitry in the event of an overcurrent or overvoltage fault.

Working Principle

The PNP7WVFT-91-3R is a fixed resistor configuration, meaning that its resistance cannot be changed. Its resistance is determined by an internal element in the form of a wire wrapped around an insulating core and coated in conductive material. As current passes through this element, a varying electrical voltage develops across it, creating a resistive force that limits the amount of current passing through the resistor. The resistance of the resistor is related to the geometry and material type of the internal element. The PNP7WVFT-91-3R is rated for a resistance of 7.5Ω, with a tolerance band of ±3%, allowing for variation in the components geometry and material.

The PNP7WVFT-91-3R resistor is also designed to manage power dissipation within an acceptable range. Once the current has flowed through the resistor, its energy is dissipated as heat, and it is important to ensure that this heat is not dissipated too quickly. The PNP7WVFT-91-3R is rated for a power rating of 1/16W, meaning that it can safely dissipate a maximum of 1/16 of a watt of energy. This is controlled through the use of a metal thick film heat sink that is attached to the component, and helps to ensure that the resistor does not overheat from energy dissipation.

Finally, the PNP7WVFT-91-3R is designed to increase contact reliability and reduce corrosion risks. The resistor’s terminals are made of Nickel-plated brass that is designed to resist oxidation and ensure a secure connection. The contact pads are also coated with conductive silver to ensure optimal electrical connections. Additionally, the component is designed to be able to withstand an extended temperature range of -40°C to +85°C, ensuring its reliability in a broad range of environmental conditions.

In summary, the PNP7WVFT-91-3R is a through hole resistor with precise resistance and power handling capabilities, making it well suited for a broad range of applications. Its well-engineered design ensures that it is highly reliable, while at the same time offering a low risk of corrosion and a consistent contact connection.

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