Explanations of Nomenclature

Rated Capacitance : the capacitance at 1KHz and 20℃

Capacitance Tolerances: the allowable deviation of capacitance at 20℃

Rated Voltage (UR): the maximum DC voltage or effective AC voltage or pulse peak-peak value able to be continuously applied on capacitor poles under rated temperature

Category Voltage (Uc): the maximum DC voltage or effective AC voltage or pulse peak-peak value able to be continuously applied on capacitor poles under upper-class-temperature

Climate Category: weather classes are expressed by characters (DIN40040: FME as an    example) or a group of numbers (IEC68-1: 55/85/21 as an example). The first character denotes lower-class-temperature, and the second denotes upper-class-temperature, and the third denotes the lasting days of wet heat experiments

Rated Temperature: the maximum fault-free ambient temperature under rated voltage

Upper Limit Working Temperature: the maximum fault-free ambient temperature under rated voltage

Capacitance Temperature-Coefficient: the relative change value when the temperatures change 1℃

Dissipation Factor (tgδ): the ratio of resistance to reactance under sinusoid of specific frequency

Insulation Resistance (IR) / Time Constant: the insulation resistance (MΩ) after lminute charging under specific voltage

Time Constant is Calculated as :τ= RC

The time constant of a capacitor equals to the duration between when the discharge begins and when the terminal voltage decreases to 36.8% of the charging voltage