RWR78S4990FPB12

Series:	Military, MIL-PRF-39007, RWR78S
Packaging:	Bulk
Part Status:	Active
Resistance:	499 Ohms
Tolerance:	±1%
Power (Watts):	10W
Composition:	Wirewound
Features:	Military, Moisture Resistant
Temperature Coefficient:	±20ppm/°C
Operating Temperature:	-55°C ~ 250°C
Package / Case:	Axial
Supplier Device Package:	Axial
Size / Dimension:	0.375" Dia x 1.780" L (9.53mm x 45.21mm)
Height - Seated (Max):	--
Number of Terminations:	2
Failure Rate:	P (0.1%)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Through Hole Resistors

Through hole resistors are commonly used devices in circuits and they provide users with an easy and inexpensive means of variable direct current resistance. The RWR78S4990FPB12 is no exception and is a combination of two potentiometer elements in an enclosed package with a single adjustable shaft. It is typically used in instrumentation, laboratory, and consumer products such as versatile control of time and frequency, adjustments in sound volumes, and electrical level matching between circuits.In its simplest form, a through hole resistor is a two-terminal element composed of an element that opposes the flow of electricity. The resistance of this element is specified in terms of an unknown and time-varying voltage difference between its two terminals. Electrical current passing through the resistor follows Ohm\'s Law, which states that the voltage is equal to the product of the resistance and the current. This means that when a certain amount of voltage is applied across it, a certain amount of current will flow through it.The RWR78S4990FPB12 through hole resistor is a multi-position potentiometer with two rotating discs on its terminal. When the discs are adjusted to create maximum resistance, it will cause the least amount of current to flow through it. This makes the resistor suitable for an array of applications such as volume-level control, speed control, and frequency-controlled measurements. If the discs are adjusted to create minimum resistance, it will cause the greatest amount of current to flow through it, making it suitable for applications such as switching, signal routing, and adjustable voltage regulators.In addition to the advantages above, the RWR78S4990FPB12 through hole resistor also has some unique characteristics that make it desirable for certain applications. For example, it is able to maintain its specified resistive range for a wide range of environmental conditions, meaning that it is more tolerant to temperature, shock, and vibration than other types of resistors. This makes it well-suited for applications that require good resistive value stability. It also has a long-life design with low wear and tear, and is highly reliable when subjected to repeated cycling operations.The working principle of the RWR78S4990FPB12 through hole resistor is based on the fact that when a voltage is applied across it, a certain amount of current flows through it. The resistor has two adjustable discs on its terminals which are connected to a shaft that can be rotated to adjust the resistance. Rotating the shaft will change the positions of the discs and create a different resistance value. It is important to note that the resistance control is not linear and will not vary linearly with the rotation angle.In conclusion, the RWR78S4990FPB12 through hole resistor is an affordable, reliable, and durable solution for a variety of applications including volume-level control, speed control, and adjustable voltage regulators. It is able to maintain its resistive range for a wide range of environmental conditions, and it is highly reliable when subjected to repeated cycling operations. Additionally, it is easy to adjust and has a long-life design with low wear and tear. With all of these features, the RWR78S4990FPB12 through hole resistor is easy to see why it is a popular choice for users around the world.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description