J40S 500 Potentiometers, Variable Resistors

Temperature Coefficient:	±50ppm/°C
Mounting Type:	Servo Mount
Bushing Thread:	--
Actuator Diameter:	0.236" (6.00mm)
Actuator Length:	0.787" (20.00mm)
Actuator Type:	Round
Termination Style:	Solder Turret
Resistive Material:	Wirewound
Adjustment Type:	User Defined
Rotation:	Continuous
Number of Turns:	1
Series:	J
Power (Watts):	1W
Built in Switch:	None
Number of Gangs:	1
Tolerance:	±5%
Resistance (Ohms):	500
Moisture Sensitivity Level (MSL):	--
Taper:	Linear
Lead Free Status / RoHS Status:	--
Part Status:	Active

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Rotary Potentiometers, Rheostats

Rotary potentiometers and rheostats are two commonly used devices in the electronic engineering industry. Both are used to control current or voltage in a circuit. The main difference between these two is the kind of resistance or impedance they offer; rheostats provide a variable resistance while potentiometers provide a fixed resistance. Moreover, rheostats are cheaper and easier to use than potentiometers.The J40S 500 is a general purpose rotary rheostat and is often used to measure electrical current. It typically has a resistance range of 0.10 to 10 ohms. Its construction includes a rheostat with a wirewound resistance element; this element adjusts the total resistance in the circuit. A fixed resistor is then connected in parallel with the rheostat. This can be adjusted with a knob or screw, allowing the device to be fine-tuned.The rheostat also has two terminals, one for input and the other for output. By adjusting the resistance, current can be regulated from 0–500 milliamperes (mA). The J40S 500 is specifically designed to reduce the amount of current needed in a circuit. It does this by providing a low resistance path to ground in order to limit the current in the circuit.Additionally, the J40S 500 uses a combination of four discs to create the resistance and voltage-controlled element. These are all connected in a single series circuit, with the disc furthest away from the two terminals serving as the output voltage disc. This is then connected between the input and output disc, with the other two discs being used in between to alter the current flow. By adjusting the four discs on the J40S 500, the average resistance between the two terminals can be adjusted. This is how it works: As the discs are rotated, the resistance between the two terminals decreases, so the current increases, and vice versa. In this way, electricity can be either increased or decreased depending on the desired effect. To summarize, the J40S 500 is a versatile rotary rheostat. It is designed to limit, control, and vary the amount of current by providing a low resistance to ground and allowing for the adjustment of four discs. This makes it a valuable device for measuring, monitoring, or regulating electrical currents in a variety of applications.

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