参数资料
型号: B32671L682K289
厂商: EPCOS Inc
文件页数: 19/30页
文件大小: 0K
描述: FILM CAP 6.8NF 10% 500VAC MKP
标准包装: 830
系列: B32671L
电容: 6800pF
额定电压 - AC: *
额定电压 - DC: *
电介质材料: 聚丙烯,金属化
容差: ±10%
工作温度: -55°C ~ 125°C
安装类型: 通孔
封装/外壳: 径向
尺寸/尺寸: 0.512" L x 0.197" W(13.00mm x 5.00mm)
高度 - 座高(最大): 0.433"(11.00mm)
端子: PC 引脚
引线间隔: 0.394"(10.00mm)
特点: 交流和双倍脉冲
包装: 带盒(TB)
其它名称: B32671L 682K289
B32671L0682K289
B32671L ... B32672L
High V AC, high temperature (wound)
Operation at overvoltages during heating and ignition of lamps (T A ≤ 40 ° C)
In lighting applications, the capacitors can be subjected to overvoltages during the heating and ig-
nition periods. An overvoltage occurs when the operation voltage exceeds the permissible
AC voltage at the resonant frequency f r .
For a repetitive application of on/off switching pulses (as for example in the life tests applied by
electronic ballast manufacturers), limits have to be imposed on the time periods under overvolt-
age and on the duty cycle, in order to keep the capacitance value within the required margins:
The overvoltage time t OV should be less than 1 sec.
The maximum duty cycle of the overvoltage is given by
where V RMS,ov is the RMS voltage during period t OV
and V RMS is the permissible AC voltage for continuous operation at the resonant frequency f r
(given by the “permissible AC voltage versus frequency f” graphics in theprevious pages).
The drift of capacitance depends on the V pp attained, and the total time under overvoltage,
which is calculated in hours as follows:
(N i
t OV ) / 3600
where N i is the number of overvoltage impulses and t OV is expressed in seconds.
The maximum drift of capacitance as a function of both parameters is provided graphically in the
following pages.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 19 of 30
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