H8422RDCA

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Through-Hole Resistors

Through-hole resistors are commonly used in electronic applications. They are usually used as a single element with a single resistance plane, or as an array of multiple resistors with different resistances. Through-hole resistors are mostly used in total- or partial-surround resistive networks for a variety of applications, such as for network analysis, signal conditioning, and noise reduction.

H8422RDCA Application Field and Working Principle

H8422RDCA is a type of through-hole resistor developed by Panasonic, with stable performance and high accuracy. It is suitable for measuring the electric current of AC and DC as well as in-circuit current measuring applications. The product is available in a variety of standard sizes and resistance values, ranging from 10Ω to 680KΩ. It also has an optional remote-sense mode.

The structure of the H8422RDCA is composed of two concentric circles made from thin-film resistive elements. The outside annular circle is made of gold-plated copper wiring for the current flow, while the inner circle is a resistive element. The resistive element is made of a manganese-film, which achieves a high resistance stability in a wide temperature range. The resistor is connected by a baked-on COB (chip-on-board) attachment for ideal heat characteristics.

The working principle and operation of H8422RDCA is based on the resistance temperature coefficient of the thin-film manganese-film resistive element. This element offers a low resistor temperature coefficient of 0.0001Ω/°C to ensure a stable resistance value even when an alternating current runs through the resistor. The resistor is designed with a superior balance in thermal and dynamic characteristics, ensuring low noise operation.

The thermal mechanism of H8422RDCA has been designed to protect it against overheating caused by long periods of inrush current, and to maintain a stable operating temperature. This is done by utilizing an integrated thermistor at the bottom of the resistor, which reduces the impact of any changes in surrounding temperature. The thermistor also limits the maximum power of the resistor, and therefore prevents it from overheating.

The H8422RDCA is manufactured with a special solder cladding pattern. This allows secure and fast mounting and allows a small blind side area on both ends for the board connection. This provides the maximum reliability and ensures that the resistor is securely mounted to the PCB. The solderability of the resistor is also an important factor, as the solder forms a strong bond between the resistor and the board. This ensures that the resistor is securely connected and reduces the risk of damage to the PCB.

The H8422RDCA is suitable for a wide range of applications, such as AC/DC and total-surround current measurement, current loop sensing, and noise reduction. It is also used as a resistor array for higher accuracy and precision applications. This type of resistor is highly reliable and offers consistent performance and accuracy in harsh environments.

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