81A2A-B28-D15/D15L

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Rotary Potentiometers and Rheostats, or POTS, are devices that provide an electrical signal that can be used to control electric circuitry. Typically these components are used in the industry, military, and medical applications, as well as in consumer electronics. The 81A2A-B28-D15/D15L is a popular type of rotary potentiometer in these applications.

At its simplest, a rotary potentiometer is a component composed of a rotating spindle that provides a continuous, linear electrical resistance between two contacts when the spindle is turned. Rotary potentiometers can contain as few as three contacts, which may be referred to as terminals: a common (C), an outer terminal (R), and a wiper (W). In these types of components, the resistance between terminals C and R will always remain constant. The resistance between terminals C and W depends on the position of the wiper, typically by adjusting the spindle. It is possible to attach to one or more additional contacts, depending upon the application requirements.

Rheostats, on the other hand, are components designed to control the amount of electrical current passed by altering the amount of resistance along the component. Rheostats can be constructed with two or three terminals, which can be used to create a short or open circuit, respectively. Unlike rotary potentiometers, rheostats are typically used to control variable speeds on motors or other machinery or to vary the brightness in lighting fixtures.

The 81A2A-B28-D15/D15L is an excellent solution for a range of applications that require a variable resistance. This type of rotary potentiometer has three terminals. The C (common) terminal allows for the component to connect to a ground connection, the R (outer) terminal provides a connection to the circuit load, and the W (wiper) terminal enables the variable resistance. This type of rotary potentiometer features a solid axle with a sprocket wheel, which allows for a more accurate adjustment of the resistance along the component.

This component is also available in two additional versions, the D15R and the D15L. The D15R model features a small sprocket wheel that can be pinned into place when the resistance does not need to be changed. The D15L, on the other hand, features a locking device that physically locks the sprocket wheel in position when the spindle is turned, while allowing for the wheel to remain free for rotational adjustment when the lock is released.

The 81A2A-B28-D15/D15L is designed for use in a variety of applications, including in industrial controls, military applications, and consumer electronics. It is well-suited for applications that require a dependable, variable resistance, as the locking mechanism and the solid axle with sprocket wheel ensure a more accurate adjustment of the resistance values. It is also a significantly more cost-effective solution than other types of rotary potentiometers and rheostats available on the market.

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