3549S-2AA-104/104A

Rotary Potentiometers, Rheostats

Rotary potentiometers, also known as knob potentiometers, are devices that are used to measure position, speed, voltage, etc. They are available in either analog or digital formats and feature either three- or four-terminal connections types. In the three-terminal connection type, one terminal is used as the reference terminal while the other two terminals measure the current or voltage. The four-terminal connection type also provides a connection to a voltage/current divider enabling voltage/current control. The 3549S-2AA-104/104A rotary potentiometer is an adjustable three-terminal type that provides excellent precision and resolution.

The 3549S-2AA-104/104A is commonly known as a rheostat. A rheostat is a variable resistance device with two terminals with which it maintains a constant current flow or voltage drop. It is used to control current flow to various electrical loads such as transformers, motors, or heaters. The 3549S-2AA-104/104A is a single-turn, non-linear, and adjustable rheostat with a maximum of 0.25 ohms resistance. It also has a low temperature drift of 1% per ohm.

The 3549S-2AA-104/104A is most commonly used in analog circuits for parameter measurement and control applications, such as speed and position measurements. It is also well suited for tuning and filtering filters, motor drive current control, and other voltage/current measurement purposes. Additionally, it is used in power generators, electronics, security systems, and automation systems.

The working principle of the 3549S-2AA-104/104A is based on varying resistance. A resistance element is formed inside the rheostat which is connected to three terminals: the plus (+) terminal, the minus (-) terminal, and the wiper terminal (W). As a rotary knob is turned, the wiper moves along the resistance element, thereby increasing or decreasing the resistance from the plus terminal to the minus terminal. This resistance change can be measured and used to measure voltage, current, speed, direction, and so on.

In conclusion, the 3549S-2AA-104/104A is a reliable and accurate adjustable rotary potentiometer, commonly known as a rheostat, that is used in applications related to measuring voltage, current, speed, direction, and position. It is characterized by a single-turn, non-linear, adjustable rheostat with a maximum of 0.25 ohms resistance, and a low temperature drift of 1% per ohm. It works on the principle of adjusting the resistance between two terminals by moving a wiper along the resistance element.