详细说明
B32652A3334J289
薄膜电容器 0.33uF 250volts 5%
制造商: EPCOS / TDK
产品种类: 薄膜电容器
RoHS: 详细信息
系列: B32652
端接类型: Radial
产品: AC and Pulse Film Capacitors
电介质: Polypropylene (PP)
电容: 0.33 uF
电压额定值 AC: 160 VAC
电压额定值 DC: 250 VDC
容差: 5 %
引线间隔: 15 mm
长度: 18 mm
宽度: 7 mm
高度: 12.5 mm
资格: AEC-Q200
封装: Ammo Pack
商标: EPCOS / TDK
电容-nF: 330 nF
电容-pF: 330000 pF
引线直径: 0.8 mm
产品类型: Film Capacitors
工厂包装数量: 3320
子类别: Capacitors
0.056 uF 1.25 kVDC 薄膜电容器 , 0.68 uF 13 mm 薄膜电容器 , 10 uF 薄膜电容器 , 10 uF Polyester 薄膜电容器 , 120 uF 100 VDC 薄膜电容器 , 5 mm 薄膜电容器
1,薄膜电容器可以储存电荷,具有隔断直流的作用
当把薄膜电容器的两个极板分别接到直流电源的正,负极上时,正负电荷就会集聚在薄膜电容器的两个电极板上,在两个极板间形成电压。随着两极板上电荷的不断增加,薄膜电容器上的电压也由小逐渐增大,直到等于直流电源电压时,电路中便不会有电流流过,充电过程就停止了,这就是薄膜电容器的充电作用。如果把直流电源和薄膜电容器断开,此时电容器上便储存上了电荷,它储存的电荷量可由下式求出,即从上式可以看出,当电容器两端的电压一定时,电容器的容量越大,它所储存的电荷量也越大。可见电容器的电容量是一个衡量电容储存电荷本领的参数。
薄膜电容器上储存电荷后,由于电容器两极板是由绝缘介质隔开的,虽然电容器两端有电压,但电荷不能从电极间通过,所以有隔断直流的作用。如果把储存有电荷的薄膜电容器的两个电极用导线相连,在连接的瞬间,电容器极板上的正,负电荷便会通过导线中和,这就是电容器的放电作用。电容器放电的过程是一个能量释放的过程,会在放电回路中做功,把电能转换成其他式的能量。在电子电路中使用时,若电子电路上的电压高于两端的电压,电容器就充电,直到薄膜电容器上建立的电压与电路的电压相等为止;如果电子电路上的电压低于两端的电压,电容器则进行放电。
2,交流电可以"通过"薄膜电容器
如果把薄膜电容器接到交流电路上,由于交流电电压的大小和方向不断变化,电容就会交替地充电,放电反复进行,此时电容的两极板间仍不会有电荷通过,但在交流电路中却形成了方向和大小都不停变化的交流电流,就像电容能通过交流电一样,这就是交流可以"通过"电容器的道理。
3,、薄膜电容器的容抗
薄膜电容器对交流电有特殊的电阻特性,称为容抗。容抗可由下式算出,即从上式不难看出,电容器的容量越大,电流的频率越高,它的容抗出就越小,交流电流越容易通过。
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