H418K7BYA

Series:	Holco, Holsworthy
Packaging:	Bulk
Part Status:	Active
Resistance:	18.7 kOhms
Tolerance:	±0.1%
Power (Watts):	0.5W, 1/2W
Composition:	Metal Film
Features:	Pulse Withstanding
Temperature Coefficient:	±15ppm/°C
Operating Temperature:	-55°C ~ 155°C
Package / Case:	Axial
Supplier Device Package:	Axial
Size / Dimension:	0.146" Dia x 0.394" L (3.70mm x 10.00mm)
Height - Seated (Max):	--
Number of Terminations:	2
Failure Rate:	--

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Through Hole Resistors

Through hole resistors are an integral component of electrical circuitry, but few understand their basic operation and application. The particular resistor we will discuss here is the H418K7BYA which has a resistance value of 4.7 Ohm, a tolerance rating of 5%, and a power rating of 1/8 Watt.

Function

Through hole resistors, regardless of their particular type and style, all perform the same basic function, which is to resist the flow of electrical current. This is done by converting some of the electrical energy passing through it into heat energy. This can be thought of as limiting the flow of energy, or restricting it, as it passes through the component to its destination.

Construction

The construction of the H418K7BYA through hole resistor consists of a ceramic body with metal wrapped around it. The ceramic body is then coated with a layer of epoxy or lacquer to help protect it from extreme temperatures, environmental moisture, or physical damage. The metal around the body is typically a nickel-iron alloy or copper depending on the device’s intended application. The ends of the resistive element are then sealed with either a plastic or metal material to complete the assembly.

Application Fields For the H418K7BYA Resistors

The H418K7BYA through hole resistor has a variety of applications. These include precision electronics, test and measurement instruments, instrumentation, digital logic circuits, audio, radio frequency (RF) circuitry, and medical equipment.

Working Principle

The working principle of a through hole resistor is based on the resistance to the flow of electricity. The voltage applied to the resistor creates a current in the metal wrapped around the resistor body that meets resistance in the form of heat energy. The resistance value of the resistor is determined by the length and width of the metal film, in addition to the material type and thickness. The greater the applied current, the greater the heat energy generated and the higher the resistance of the resistor.

Tolerance and Power Rating

The minimum and maximum resistance of the H418K7BYA through hole resistor is determined by its tolerance rating. The tolerance rating of this particular resistor is 5%, meaning that the resistance can be anywhere between 4.4 Ohms and 5 Ohm.The power rating of the H418K7BYA through hole resistor is 1/8 Watts. This means that the resistor can handle up to 1/8 of a Watt of power before it becomes too hot. Exceeding the power rating will cause the resistor to heat up too much, resulting in damage or failure.

Conclusion

The H418K7BYA through hole resistor is a versatile, reliable, and cost-effective component that can be used in a wide variety of applications. With its 5% tolerance rating and 1/8 Watt power rating, this resistor will provide consistent performance with minimal fuss. Understanding the basic construction, application fields, and working principle of through hole resistors such as the H418K7BYA will help ensure safe and efficient circuit design.

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