73JB25K

Temperature Coefficient:	±20ppm/°C
Mounting Type:	Panel Mount
Bushing Thread:	3/8-32
Actuator Diameter:	0.250" (6.35mm)
Actuator Length:	0.813" (20.64mm)
Actuator Type:	Slotted
Termination Style:	Solder Lug
Resistive Material:	Wirewound
Adjustment Type:	User Defined
Rotation:	3600°
Number of Turns:	10
Series:	73JB
Power (Watts):	2W
Built in Switch:	None
Number of Gangs:	1
Tolerance:	±5%
Resistance (Ohms):	25k
Taper:	Linear
Moisture Sensitivity Level (MSL):	--
Part Status:	Not For New Designs
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction to Rotary Potentiometers, RheostatsRotary Potentiometers, also known as Potentiometers, or Variable Resistors, are passive two-terminal electrical components that measure the angular position of a potentiometer spindle. While they are primarily used in electrical and electronic circuits, they are also used for mechanical purposes such as positioning a robotic arm.Potentiometers consist of several components including a shaft or spindle, a resistor, a terminal, a flat disc, and an outer housing. The shaft is connected to the flat disc which turns the resistor inside. As the disc is turned, between the two terminals, the resistance between then can be changed from a minimum to a maximum depending on the angular position of the rotary spindle.Rheostats, on the other hand, are two-terminal variable resistors that are used to regulate the current flow in a circuit. Unlike potentiometers, which have a third terminal, rheostats only have two. As the disc is turned, it directly alters the resistance between the two terminals of the rheostat.73JB25K application field and working principleThe 73JB25K rotary potentiometer is rated at 5A, 25K ohm and is designed for use in electrical and electronic applications such as audio volume control or robot arm positioning. It features a flat 10mm diameter spindle, 6mm long, with a nickel silver shaft and a phenolic housing. It has a carbon track consisting of 28 turned tracks with a linear taper for the resistor. The turning angle is 300° with an electrical angle of 273°.The 73JB25K is a three terminal device. It consists of two fixed terminals and one adjustable terminal. The adjustable terminal is connected to the flat disk which is connected to the rotor. As the rotor is turned, the resistance between the fixed terminals and the adjustable terminal is altered. When the rotor is at its minimum position, the resistance between the terminals is at a minimum (25K ohm). As the rotor is turned further, the resistance increases to its maximum setting of 25K ohm. This resistance can be either increased or decreased depending on the direction of rotation. The 73JB25K is a bidirectional device that can rotate both in clockwise and counter-clockwise directions.The 73JB25K is designed to provide a linear variation of resistance between its two fixed terminals and its adjustable terminal. Its linear taper ensures that the resistance change is linear and predictable. This makes it suitable for use in applications where a linear variation of resistance is desired.The 73JB25K is also suitable for use with digital devices such as robot arms, where a precise angular position is required. Its 300° variable angle and 273° electrical angle makes it ideal for this application.The 73JB25K has a wide temperature range of -55°C to +85°C, making it suitable for use in extreme temperature conditions. It is also resistant to humidity and dust, making it well suited for industrial environments.ConclusionRotary potentiometers and rheostats are two-terminal electrical components used in a variety of applications. The 73JB25K rotary potentiometer is rated at 5A, 25K ohm and is designed for use in electrical and electronic applications such as audio volume control and robotics applications. It has a 300° variable angle and 273° electrical angle, making it ideal for use with digital devices. It has a wide temperature range of -55°C to +85°C and is resistant to humidity and dust, making it suitable for industrial use. Its linear taper ensures a predictable and linear variation of resistance between its two fixed terminals and its adjustable terminal.

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