RLR20C4021FRRSL

Series:	Military, MIL-PRF-39017/02, RLR20
Packaging:	Tape & Reel (TR)
Part Status:	Active
Resistance:	4.02 kOhms
Tolerance:	±1%
Power (Watts):	0.5W, 1/2W
Composition:	Metal Film
Features:	Military, Moisture Resistant, Weldable
Temperature Coefficient:	±100ppm/°C
Operating Temperature:	-65°C ~ 150°C
Package / Case:	Axial
Supplier Device Package:	Axial
Size / Dimension:	0.138" Dia x 0.375" L (3.51mm x 9.53mm)
Height - Seated (Max):	--
Number of Terminations:	2
Failure Rate:	R (0.01%)

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Through Hole Resistors

Through hole resistors, also known as "fixed resistors," are a class of resistors with two leads with a gap left by a physically large cylindrical body. Classical “through hole” resistors are made of two metal plates, a sprue, and a resistive material, which is generally made of carbon. The most common type of through hole resistor is the RLR20C4021FRRSL. This resistor is constructed of one perforated metal plate and one thin metal plate. The metal plate structure enhances the overall heat dissipation capacity, and the perforated metal plate improves the contact between the two plates and the resistor. The resistance value of this type of resistor is determined by the magnitude of the gap between the two metal plates.The applications for through hole resistors are primarily related to current limiting and voltage dropping in electronic circuits or devices. To efficiently regulate the current flow in an electrical device, a resistor must be placed in series with the electrical component. This is done to divert some of the current away from the component and prevent the component from being damaged from too much current. Similarly, when designing a device, it is important to include resistors in parallel with components to activate or deactivate them. The working principle of through hole resistors is based on Ohm\'s law. This states that the voltage across a resistor is directly proportional to the current through it, provided that the temperature and resistivity remain constant. Thus, the resistance of the resistor determines the degree of current flowing through it. The resistance value of a resistor is determined by the magnitude of the gap between the two metal plates. Therefore, changing the size of the gap changes the resistance of the resistor, thereby changing the current flowing through it. By adjusting the gap between the two metal plates, electronic circuits can be designed in such a way so that they operate at specific voltages, or currents, which gives more control over the performance and the functioning of the device. In this way, through hole resistors are an essential component in electronic circuits and provide more flexibility in the design.Through hole resistors are designed to withstand high temperatures, currents, and voltage, making them a reliable and efficient component. These resistors are very robust and can be used in several applications, such as current regulation, voltage drop, and power regulation. Additionally, through hole resistors are responsive and accurate in both operation and measurement. This ensures that a desired result can be achieved in less time and with greater accuracy than with other resistors.Overall, through hole resistors are an essential part of any electronic circuit. Their design involves careful selection of the resistive material, construction of the metal plates, and adjustment of the gap between them to provide the desired resistance value. The resulting resistor can then be used in various applications such as current regulation, voltage regulation, or power regulation. Ultimately, through hole resistors are reliable and accurate in operation and measurement, making them an invaluable component in any electronic device.

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