3371R20KL.5

Series:	*
Part Status:	Active
Lead Free Status / RoHS Status:	--

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Rotary Potentiometers, Rheostats

Rotary potentiometers and rheostats are two similar instruments used mainly in automatic control and electric communication, but they are usually classified differently. At first glance, the two devices may appear to be very similar but, depending on the requirements of the application, one of the two can clearly be identified as better suited for the task.A rotary potentiometer is an adjustable resistor, or constant current device, which consists of a moving element and a static element that sweep a specified area as the former moves past the latter. This sweeping action of the two elements creates a voltage drop across the rotary potentiometer that is proportional to the angle of rotation. This device is quite similar to a rheostat and is used to control the position of an actuator, like a throttle, or the setting of a potentiometer.A rheostat, also known as a variable resistor, is a three-terminal device consisting of a wiper-arm that sweeps a resistive element. Rheostats are typically used for adjusting high-power devices, as they can deliver or absorb high amounts of power. Rheostats are especially used to control the intensity of a light bulb, although the term “dimmer” is more suitable for that purpose.The 3317R20KL.5 is an example of a rotary potentiometer, as identified through its product codes. The 3317R20KL is a robust, compact rotating variable resistor having a static and moving electrode. Its superior design is capable of providing a total resistance range of 0.06 ohms up to 10 kilohms and a terminal resistance of 5-10 kilohms. This device is waterproof and dust-resistant and is compatible with many printed circuit boards.The application of the 3317R20KL.5 rotary potentiometer is generally for controlling the variable speed of a motor or the rate of a servo mechanism. It can also be used for adjustable voltage or current regulators, voltage dividers and as a variable resistor in monitoring and control equipment.The working principle of the 3317R20KL.5 is similar to that of a regular rotary potentiometer, whereby the rotation angle of the shaft is related to a specific electrical resistance. In this device, a resistive element such as a wire, track or sheet is connected to the moving electrode, while the static electrode is connected to the other terminal. A signal current passing through the resistive element generates a voltage drop across the device, which is proportional to the angle of rotation of the wiper arm.The 3317R20KL.5 is an excellent option for applications in industrial, automotive, and consumer electronics, as it is easy to install, reliable, and cost-effective. It is capable of handling high currents and wide temperature ranges, while its inextensible conductive layer ensures a reliable contact at the interface. As such, it can be safely used in a number of applications, ranging from home appliances to medical and laboratory equipment.Rotary potentiometers and rheostats, as highlighted above, are similar in many ways but can be clearly distinguished depending on the type of application. The 3317R20KL.5 rotary potentiometer is a reliable and cost-effective device suitable for a variety of industrial, automotive, and consumer electronic applications. Its working principle is straightforward and its performance is superior, making it an excellent choice when a precise and adjustable resistive device is required.

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