SFR2500003839FR500

Series:	SFR25
Packaging:	Tape & Reel (TR)
Part Status:	Active
Resistance:	38.3 Ohms
Tolerance:	±1%
Power (Watts):	0.4W
Composition:	Metal Film
Features:	--
Temperature Coefficient:	±100ppm/°C
Operating Temperature:	-55°C ~ 155°C
Package / Case:	Axial
Supplier Device Package:	Axial
Size / Dimension:	0.098" Dia x 0.256" L (2.50mm x 6.50mm)
Height - Seated (Max):	--
Number of Terminations:	2
Failure Rate:	--

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Through Hole Resistors Through hole resistors are passive electronic components for controlling electrical current in a variety of industrial, commercial, medical, and military applications. In these applications, they help protect circuits against excessive current, provide stability and impedance in high frequency signals, and adjust balance in electronic circuits. Through hole resistors are a type of fixed resistor, with components that generally have two leads passing through its center. They are designed to be mounted on circuit boards, rather than being soldered into place. The designation SFR2500003839FR500, which is a code system used by some manufactures for through hole resistors, identifies the working characteristics of the component.The first two digits of the code, “25”, indicate the type of resistor. For this code, the “25” refer to a 5-band type with 3 bands of color identification and a band of tolerance. This type of resistor has 5 rings or rings of conductive material placed in a row with the final band 1/2 of the others. The tolerance band, which is a gold, silver, or white band, indicates the amount of allowable change from the designated resistance. The third and fourth digits denote the number of zeroes between the two digits following the tolerance band; in this case, “00” indicating no zeroes. The fifth and sixth digits, “38”, specify the resistance value in ohms. A 38 depict 38 ohms of resistance. The seventh and eighth digits, “39”, indicate the tolerance of the resistor. A 39 indicates a ± 3.9%, or a tolerance of ± 3.9 ohms of resistance. The ninth digit, “F”, is the temperature coefficient which is usually “F” for resistors. The final two digits, “500”, determine the power rating of the through hole resistor, or how much power it can safely dissipate. In this case, the resistor is rated for 500 mW (milliWatts).Through hole resistors find their applications in a variety of applications where devices need to control the current flowing in electronic circuits and provide stability and impedance in high frequency signals. They can be used to control motor speed, reduce voltage and current, measure voltage and current, filter noise, and adjust balance in electronic circuits such as audio power amplifiers. Through hole resistors can also be used in medical equipment and military applications such as aerospace, aircraft, and satellite systems.The working principle of a through hole resistor is simple. It is the opposition and flow of the electrical current, which resists the movement of electrons through a wire or element. When a current passes through a resistor, a potential difference (voltage) is developed across the resistor, resulting in a given amount of electrical energy being dissipated in the form of heat. This type of dissipated energy is known as Ohm\'s Law and is an important principle when using through hole resistors.Through hole resistors are durable and can be used to control current in many different types of circuits. They come in a variety of resistance values, allowing them to be used in a wide range of applications. They are also relatively inexpensive and easy to use, making them an ideal choice for many projects. With their long operating life, low power consumption, and reliable performance, through hole resistors continue to be a popular choice for electronics manufacturers and technicians.

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