51CAD-E16-B20L

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Rotary Potentiometers, Rheostats

51CAD-E16-B20L Application Field and Working Principle

The 51CAD-E16-B20L is a type of rotary potentiometer and part of a wide range of rheostats and rotary potentiometers from the Bourns family of potentiometers. It is specifically designed to work as a voltage divider, providing a linear change in voltage in response to rotation of the control shaft. Using a potentiometer is a simple and effective way to electronically adjust a circuit\'s output voltage to obtain some desired output.

The 51CAD-E16-B20L consists of a wiper arm, a control shaft, a base resistor, and two potentiometer resistors, one of which is adjustable. It has a 20 mm bushing diameter, 16-pin body style, and 15° angle of turn. The electrical characteristics are 0.5 watts power rating, 100 K max resistance, 1 megohm max resistance tolerance, and 25 voltage rating.

The 51CAD-E16-B20L is primarily used in applications where the desired output voltage is adjustable over a wide range and can be finely tuned or changed with the rotation of the control shaft. Common applications of the 51CAD-E16-B20L include regulation in electronic circuits, controlling motor speed, controlling audio output levels, and providing voltage to various electrical components.

The 51CAD-E16-B20L works by separating two resistors into four sets; the linear range, the curve adjustment range, the break-point adjust, and the output range. The linear range is where the potentiometer most closely follows a linear pattern, with minimal deviation from ideal. The curve adjustment range is the range where the actual resistor values, as adjusted, deviate from the desired linear output pattern. The breakpoint adjust allows the user to establish a set-point or “break” at which the resistor values become equal, allowing for precise control of output voltage. The output range allows the user to further adjust the curve adjustments to fine-tune the desired output voltage.

To utilize the 51CAD-E16-B20L, at least 4 pins must be connected in order to measure the voltage output. The first pin is connected to the output range, the middle pin connects to the breakpoint adjust, the bottom pin connects to the control shaft, and the top pin is connected to the linear range. The voltage is measured between the linear and output ranges. As the control shaft is rotated, the resistor values are adjusted accordingly. Each turn of the control shaft will change the voltage output by one step, allowing for precise and convenient adjustment.

In general, the 51CAD-E16-B20L is an efficient and reliable way to adjust the voltage output of a circuit. It is especially suitable for applications where precision and consistent voltage output is required, such as regulation in electronic circuits, motor speed controllers, and audio applications. Its user-friendly features make it an ideal choice for any projects requiring potentiometers.

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