H421K5DYA

Series:	Holco, Holsworthy
Packaging:	Bulk
Part Status:	Active
Resistance:	21.5 kOhms
Tolerance:	±0.5%
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: H421K5DYA Application Field and Working Principle

Through hole resistors are compact electronic components used to control the amount of electricity flowing in an electronic circuit. As the name implies, through hole resistors are installed through a hole in the printed circuit board (PCB). This type of resistor uses a variety of manufacturing technologies and materials to provide the highest level of accuracy, reliability, and temperature tolerance.H421K5DYA is a surface-mount, through-hole axial-lead resistor with a resistance value of 4.21kΩ. The operating temperature range is from -55°C to +155°C. The device is designed to withstand high surge current (maximized power rating) and mechanical shock. The resistor is also designed with a lead free, silver-plated copper terminations which provide excellent contact to the device’s terminal pads.H421K5DYA is primarily used in circuits that require high power and accuracy. The device is suitable for circuits with high operating temperatures. H421K5DYA’s gold tin alloy layer helps protect the resistor from corrosion and oxidation, which can cause shorting of the terminal and consequently damage the device.The working principle of a through hole resistor is quite simple. When electricity is passed through the device, it creates an electric field inside the resistor. This electric field is influenced by the ρ value of the resistor material, and the applied voltage. The resulting electric field produces a current that’s equal to the applied voltage divided by the resistance value of the device. The current then flows through the device until it reaches a certain level. The power rating of the resistor depends on the resistance value, the applied voltage, and the temperature of the device.Through hole resistors are an invaluable tool in any electronic circuit design. Not only do they allow for precise control over the amount of electricity flowing in the circuit, but they’re also relatively inexpensive, compact in size, and easy to install. When combined with proper design techniques, they can provide reliable performance and help optimize circuits for maximum efficiency.

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