MFR25SFTF52-29K4

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Through Hole Resistors are indispensable components in the construction of complex electrical systems. The MFR25SFTF52-29K4 is an example of a through hole resistor, featuring a three terminal configuration with excellent power-handling. In this article, we will look into the application field and working principle of the MFR25SFTF52-29K4 through hole resistor.

Design and Application Field

The MFR25SFTF52-29K4 is a three-terminal through hole resistor, consisting of three layers of metal film deposited on an insulating ceramic body. The terminals of the resistor have three holes drilled in it for easy insertion into a printed circuit board(PCB) and soldering. It is designed to dissipate a maximum continuous power of 7 watts at 25°C, though its power representing characteristics may reduce with increasing temperature. In terms of so-called ‘endurance advantage’, the MFR25SFTF52-29K4 has quad layer termination, a default layer thickness of 4.5µm, and proprietary contact plating for additional corrosion protection.

The MFR25SFTF52-29K4 is most suitable for applications that require high power dissipation and additional wear protection, such as in automotive, military, aerospace, and LED lighting applications. It also has stable electrical characteristics, absorb temperature fluctuations, and provide protection from electrostatic discharges. The resistor is also resistant to vibration and other physical shock.

Working Principle

The MFR25SFTF52-29K4 works on the principle of ohmic resistance. When a voltage is applied across the resistor, electrons flow through the resistor, creating an electric current. The flow of electric current is subject to ohmic resistance, which is a function of the number of electrons available in the resistor. To determine the specific resistor value, the number of electrons must be known. To do this, we can measure the current in the circuit and then calculate the resistance.

The MFR25SFTF52-29K4 has an ohmic value of between 200 ohms and 29,000 ohms, and can be used in any resistive circuit application that requires a fixed current or voltage. It can also be used in different kinds of resistive devices such as voltage dividers, attenuators, and current limiters. The performance characteristics of the resistor are dependent on the material used as the resistive layer, its physical shape, and the nature of the pre-treatment process. It is common practice to apply a process prior to soldering to improve the adhesion of the resistive material to the surface of the printed circuit board.

Summary

In summary, the MFR25SFTF52-29K4 is a through hole resistor designed to withstand high power dissipation and provide extra wear protection. Its stability and resistance to temperature change make it suitable for use in robust automotive, military, aerospace, and LED lighting applications. The resistor works on the ohmic resistance principle, and can be used to regulate the current or voltage in a resistive circuit. By measuring the current flow and then calculating the resistance, we can determine the exact resistor value.

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