381L500

Temperature Coefficient:	--
Mounting Type:	Panel Mount
Bushing Thread:	1/4-32
Actuator Diameter:	0.125" (3.18mm)
Actuator Length:	0.438" (11.12mm)
Actuator Type:	Slotted
Termination Style:	Solder Lug
Resistive Material:	Conductive Plastic
Adjustment Type:	User Defined
Rotation:	300°
Number of Turns:	1
Series:	381
Power (Watts):	1W
Built in Switch:	None
Number of Gangs:	1
Tolerance:	±10%
Resistance (Ohms):	500
Taper:	Linear
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Rotary Potentiometers and RheostatsA potentiometer, sometimes called a rheostat, is an electrical device used in a wide variety of applications. The device is made up of a resistance track, two contact points, and a rotating control knob. As the control knob is turned, the resistance of the track changes, creating a voltage drop across the track.Potentiometers can be used in a variety of applications ranging from adjusting motor speed, regulating temperature, and controlling power levels to adjusting sound and light brightness. Rheostats are used for the same purpose as potentiometers, but they have a single stationary contact point instead of two.Potentiometers and rheostats are found in a variety of electronic application fields. Depending on the device, they are used in electrical measuring equipment, motor control, power supplies, robotics, aeronautics, marine engineering, telecommunications, computer systems, and even medical applications.Applications of rotary potentiometers and rheostats include audio and radio controls, position controls or transducers, servo motors, AC or DC motor control, boost and buck regulators, light dimming controls, and audio power amplifiers. Potentiometers or rheostats are also used in car ignition systems, flow control valves, and HVAC systems.The working principle of a rotary potentiometer is simple. When the control knob is turned, the resistance of the track changes. This causes an increase or decrease in the current flowing through the track and, consequently, a voltage drop across the track.The range of a potentiometer is determined by its resistance track. Rotary potentiometers come in various sizes and capacities, from 50 Ohms to several megohms. The most common are single turn potentiometers, also called detents, which are usually used for finer control over the range.Rheostats, on the other hand, have a single contact point. When the control knob is turned, the current flowing through the rheostat is adjusted, thus changing its range. Rheostats are typically used for greater control over the range, as well as for precise adjustments.Potentiometers and rheostats are versatile, affordable, and extremely useful electrical components. They can be used in a variety of applications, from basic onboard controls to sophisticated electronics.

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