三星电机 MLCC能承受的电流 Spec是多少？
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发布日期：2022-10-27
三星电机关于MLCC承受电流的 Spec没有特定的值。当MLCC加 DC 电压时，几乎没有电流经过 MLCC，因此没有问题，当加AC 电压或脉冲电压时，电流经过电极会出现发热。三星电机在 Spec Sheet 上有标注相关内容。使用时需要注意因加 AC 电压或脉冲电压导致的自身发热温度(Self-heating temperature)。
※ Self-heating Temperature
It is necessary to design the system, with considering self-heating generated by the ESR (Equivalent Series Resistance) of MLCC when AC voltage or pulse voltage is applied to MLCC.
2-6-1. When MLCC is used in an AC voltage or pulse voltage circuit, self-heating is generated when AC or pulse current flows through MLCC. Short-circuit may be occurred by the degradation of MLCC’s insulating properties.
2-6-2. The reliability of MLCC may be affected by MLCC being used in an AC voltage or pulse voltage circuit, even the AC voltage or the pulse voltage is within the range of rated voltage.
Therefore, make sure to check the following conditions.
1) The surface temperature of MLCC must stay within the maximum operating temperature after AC or Pulse voltage is applied.
2) The rise in increase by self-heating of MLCC must not exceed 20℃
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