Reference only
Caution
4. Type of Applied Voltage and Self-heating Temperature
1. Confirm the operating conditions to make sure that no large current is flowing into the capacitor due to the continuous
application of an AC voltage or pulse voltage. When a DC rated voltage product is used in an AC voltage circuit or a
pulse voltage circuit, the AC current or pulse current will flow into the capacitor; therefore check the self-heating condition.
Please confirm the surface temperature of the capacitor so that the temperature remains within the upper limits of the
operating temperature, including the rise in temperature due to self-heating. When the capacitor is used with a
high-frequency voltage or pulse voltage, heat may be generated by dielectric loss.
<Applicable to Temperature Characteristics U2J(7U)>
Since the self-heating is low in the low loss series, the allowable voltage becomes extremely high compared to
the common X7R(R7) characteristics. However, when a load with self-heating of 20°C is applied at the rated voltage, the
allowable voltage may be exceeded. Please confirm that there is no rising trend of the capacitor's surface temperature
and that the surface temperature of the capacitor does not exceed the maximum operating temperature.
The excessive generation of heat may cause deterioration of the characteristics and reliability of the capacitor.
5. DC Voltage and AC Voltage Characteristics
1. The capacitance value of a high dielectric constant type capacitor changes depending on the DC voltage applied.
Please consider the DC voltage characteristics when a capacitor is selected for use in a DC circuit.
1-1. The capacitance of ceramic capacitors may change sharply depending on the applied voltage (see figure).
Please confirm the following in order to secure the capacitance.
(1) Determine whether the capacitance change caused by the applied voltage is within the allowed range.
(2) In the DC voltage characteristics, the rate of capacitance change becomes larger as voltage increases, even if the
applied voltage is below the rated voltage. When a high dielectric constant type capacitor is used in a circuit that
requires a tight (narrow) capacitance tolerance (e.g., a time constant circuit), please carefully consider the voltage
characteristics, and confirm the various characteristics in actual operating conditions in an actual system.
2. The capacitance values of high dielectric constant type capacitors changes depending on the AC voltage applied.
Please consider the AC voltage characteristics when selecting a capacitor to be used in an AC circuit.
6. Capacitance Aging
1. The high dielectric constant type capacitors have the characteristic in which the capacitance value decreases with the
passage of time. When you use high dielectric constant type capacitors in a circuit that needs a tight (narrow) capacitance
tolerance (e.g., a time-constant circuit), please carefully consider the characteristics of these capacitors, such as their
aging, voltage, and temperature characteristics. In addition, check capacitors using your actual appliances at the intended
environment and operating conditions.
7. Vibration and Shock
1. Please confirm the kind of vibration and/or shock,
its condition, and any generation of resonance.
Please mount the capacitor so as not to generate resonance,
and do not allow any impact on the terminals.
Crack
2. Mechanical shock due to being dropped may cause damage or
Floor
a crack in the dielectric material of the capacitor.
Do not use a dropped capacitor because the quality
and reliability may be deteriorated.
3. When printed circuit boards are piled up or handled,
the corner of another printed circuit board should not be allowed
to hit the capacitor, in order to avoid a crack or other damage to the capacitor.
2/19
EGKRC05
5秒后页面跳转
PCF8574资料解读：主要参数分析、引脚说明
AD637数据手册解读：主要特性、引脚及其功能解读、电气参数
ADUM1201资料手册解读：参数分析、引脚说明、应用分析
一文带你了解压敏电阻器在直流电路中的过压保护作用
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
