PDB181-E420K-103A2

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Rotary potentiometers and rheostats are electric components that are used to measure the current passing through a circuit. They are similar in their design and function, but they are not quite the same. The one that we are focusing on here is the PDB181-E420K-103A2 rotary potentiometer.

A rotary potentiometer is a three-terminal resistor with a sliding contact that moves along a resistive element. As the sliding contact moves, it varies the resistance between the ends of the resistive element. The resistance between the two ends can be continuously adjusted by rotating the potentiometer. When a voltage is applied to the outer two terminals, a current can flow from one terminal to the other. This current is proportional to the resistance between the terminals.

The PDB181-E420K-103A2 rotary potentiometer has an adjustable resistance of 20 Ohms to 1M Ohm. It has a linear adjustment with an accuracy of ± 6%. This makes it suitable for use in various applications, such as controlling the speed of a motor, adjusting the volume of amplifiers, and measuring small resistances. It has a power rating of 3W and an operating temperature range of -55°C to +105°C.

The working principle of a rotary potentiometer is quite simple. It is basically a three-terminal resistor, with two fixed terminals connected to the resistive element. The third terminal is connected to a movable contact that can be rotated along the resistive element. As the contact moves, the resistance between the two terminals changes accordingly.

As the contact is rotated, the resistive element acts as a resistor and limits the flow of current. The voltage drop across the resistor is proportional to the resistance between the two terminals. Thus, by changing the resistance between the terminals, the voltage drop across the resistor also changes accordingly.

The PDB181-E420K-103A2 rotary potentiometer is a useful device for measuring and controlling small resistances in circuits. It is accurate and reliable, and it can be used in various applications. Whether you are controlling the speed of a motor or adjusting the volume of an amplifier, the PDB181-E420K-103A2 rotary potentiometer is an excellent choice.

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