D75K2K0

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Adjustable power resistors are an important element in modern electric power systems. They can be used to protect sensitive components from over-voltage or over-current surges, to limit power flows, or to adjust the voltage or current of a power source. The D75K2K0 is a type of adjustable power resistor. This article will discuss the application field and working principle of the D75K2K0.

Application Field

The D75K2K0 is a three-wire adjustable power resistor with a voltage range of 8 to 72 volts and a resistance range of 0.1 to 5 ohms. The adjustable range, combined with its low resistance and high surge current capability, make it a popular choice for power supply protection and voltage/current source management. It is especially suitable for applications in high-density power supplies, where space is limited, or for equipment that needs to withstand high electrical loads.

The D75K2K0 can be used in applications such as automotive power supplies, battery chargers, low-voltage DC circuits, power converters, and uninterruptible power supplies. It is also suitable for sensitive electronics, such as cell phones, computers, and display screens.

Working Principle

The D75K2K0 adjustable power resistor works on the principle of self-regulating resistors (SRA). It is composed of two parts: a variable resistor and a sensing resistor. The variable resistor is composed of a series of metal strips that are connected together to form a branch pattern; the sensing resistor is composed of metal plates sandwiched between two insulation layers. The variable resistor is connected in parallel with the sensing resistor.

When the applied voltage, or current, changes, the variable resistor changes its resistance and the sensing resistor detects the change. This, in turn, causes the ratio of the resistance of the two resistors to change. This causes the total resistance of the two resistors, and thus the total power, to change.

The working principle of the D75K2K0 adjustable resistor is also based on the same principle. However, the sensing resistor is connected in series with the variable resistor, rather than in parallel. As the voltage or current changes, the variable resistor changes its resistance, and the sensing resistor detects the change. This causes the total resistance and power to change.

The D75K2K0 adjustable resistor is also capable of providing a low on resistance and is suitable for applications where power conservation is important. Additionally, the resistor is designed to tolerate an overload without suffering significant damage.

Conclusion

The D75K2K0 adjustable power resistor is widely used for power supply protection and voltage/current source management in a variety of applications. It is composed of two parts: a variable resistor and a sensing resistor, which work together to change the total power when the voltage or current changes. Additionally, the D75K2K0 is capable of providing a low on resistance and is designed to tolerate an overload without damage. Therefore, the D75K2K0 is an ideal choice for power supplies that need to be protected from overcurrent or voltage surges.

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