Technical Notes Download

If you wish to download this data, please read and agree with the "KOA Technical Information General Disclaimer". The data will be available after agreeing to the disclaimer. If you agree, you will be bound by the "KOA Technical Information General Disclaimer."

Revision of International Standards for Chip Resistors

Title of document Content Last Update PDF

NEW
Revision of International Standards for Chip Resistors

Key points and customer benefits of the August 2023 revision of the international standard for surface-mount resistors 2025/03/28 PDF : 1587KB

Environmental resistance

Title of document Content Last Update PDF

Electrolytic corrosion of resistor

Explanation of the mechanism, causes, and countermeasures for the electrolytic corrosion in resistors with a thin carbon or metal film 2024/8/28 PDF : 488KB

Sulfuration of resistors

Explanation of the mechanism, causes, and countermeasures for the sulfuration in flat chip resistors with silver internal electrodes. 2024/11/14 PDF : 402KB

ESD capability of resistors

Title of document Content Last Update PDF


ESD capability of resistors

An overview of the ESD testing and the difference in ESD capabilities due to the types, sizes and resistance values of resistors. 2023/06/08 PDF : 508KB

Heat generation and dissipation of chip components

Title of document Content Last Update PDF

NEW
Heat generation and temperature rise of chip resistors

The temperature of a chip resistor is determined by both applied power and the heat dissipation capacity of its surroundings. This section explains the connection between applied power, heat generation, and temperature rise. 2025/3/28 PDF : 991KB


Heat generation and dissipation of small chip components

The basic concept of heat dissipation designing of the PCB using thermal resistance as an index. 2022/11/11 PDF : 1135KB

High-frequency characteristics

Title of document Content Last Update PDF


High-frequency characteristics of resistors

Precautions when using resistors at high-frequency. 2021/10/15 PDF : 634KB

Power derating

Title of document Content Last Update PDF
Power derating for surface mount resistors The need for and the benefits of appropriate power derating for surface mount resistors. 2020/07/06 PDF : 335B


Power derating based on terminal part temperature

The reasons why the terminal part temperature is suitable as the reference for derating of surface mount resistors. 2024/08/28 PDF : 237KB


Procedure for power derating based on terminal part temperature

Guidelines for selecting the proper flat chip resistors for each application using the power derating curve based on the terminal part temperature. 2020/12/09 PDF : 216KB


Precautions on measuring terminal part temperature

Precautions for measuring the terminal part temperature of surface mount resistors. 2020/10/12 PDF : 273KB

Pulse power capabilities

Title of document Content Last Update PDF
Pulse power capabilities of resistor The evaluation of pulse power capabilities and the selection of resistor. 2024/08/28 PDF : 517KB

Pulse power evaluation using equivalent rectangular waves

The reason to use equivalent rectangular waves for pulse power evaluation. 2021/04/28 PDF : 933KB

Current sensing resistor

Title of document Content Last Update PDF
Effect of parasitic inductance of current sensing resistor Precautions for design and influence of parasitic inductance when measuring high frequency current. 2018/12/20 PDF : 354KB
Voltage measurement using current sensing resistor Resistance value of copper foil patterns, temperature coefficient of resistance, current path, influence in measured voltage from voltage measuring position and precautions for design. 2018/12/20 PDF : 681KB
Parallel placement of current sensing resistors Resistance value of copper foil patterns, temperature coefficient of resistance, current path, influence in measured voltage from voltage measuring position and precautions for design. 2018/12/20 PDF : 284KB

 

Unauthorized use (copying, modifying, reprinting, diverting, distributing, posting, selling or publishing) without prior authorization of KOA or the rights owner is strictly prohibited by law.