KOA Speer Technical Notes
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 | |
|---|---|---|---|
| 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 |
Environmental resistance
| Title of document | Content | Last Update | |
|---|---|---|---|
| Electrolytic corrosion of resistor | Explanation of the mechanism, causes, and countermeasures for the electrolytic corrosion in resistors with a thin carbon or metal film | 2024/08/28 | |
| Sulfuration of resistors | Explanation of the mechanism, causes, and countermeasures for the sulfuration in flat chip resistors with silver internal electrodes. | 2024/11/14 |
ESD capability of resistors
| Title of document | Content | Last Update | |
|---|---|---|---|
| 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 |
Heat generation and dissipation of chip components
| Title of document | Content | Last Update | |
|---|---|---|---|
| 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. | 2025/03/28 | |
| 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 |
High-frequency characteristics
| Title of document | Content | Last Update | |
|---|---|---|---|
| High-frequency characteristics of resistors | Precautions when using resistors at high-frequency. | 2021/10/15 |
Power derating
| Title of document | Content | Last Update | |
|---|---|---|---|
| Power derating for surface mount resistors | The need for and the benefits of appropriate power derating for surface mount resistors. | 2020/07/06 | |
| 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 | |
| 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 | |
| Precautions on measuring terminal part temperature | Precautions for measuring the terminal part temperature of surface mount resistors. | 2020/10/12 |
Pulse power capabilities
| Title of document | Content | Last Update | |
|---|---|---|---|
| Pulse power capabilities of resistor | The evaluation of pulse power capabilities and the selection of resistor. | 2024/08/28 | |
| Pulse power evaluation using equivalent rectangular waves | The reason to use equivalent rectangular waves for pulse power evaluation. | 2021/04/28 |
Current sensing resistor
| Title of document | Content | Last Update | |
|---|---|---|---|
| Effect of parasitic inductance of current sensing resistor | Precautions for design and influence of parasitic inductance when measuring high frequency current. | 2018/12/20 | |
| 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 | |
| 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 |
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.
