穿心式电容
穿心式电容电容,是一种三端电容,因其空心的物理结构而得名。屏蔽腔体输出或输入的低频信号(包括电源电源),经过穿心式电容接进来,可以过滤掉一部分带进来的噪声,因此,穿心式电容在很多专用高频、超高频、微波设备中大量使用。
优点
穿心式电容,其电感较普通电容小得多,故而自谐振频率很高;同时,由于其采用穿心式的安装方式,也有效地防止了高频信号从输入端直接耦合到输出端,因此,这种低通高阻的组合,在 1GHz 频率范围内,提供了极好的抑制效果。
穿心电容主要应用于:,馈通滤波器,低通滤波器,EMI滤波器,信号滤波器,滤波电容器,焊接式馈通滤波器,螺纹式馈通滤波器,树脂密封滤波器,玻璃密封高性能滤波器 标称容量Capacitance :
10pF,65pF,100pF,470pF,500pF,1000pF,1200pF,1500pF,1750pF,2000pF,2500pF,2700pF,3000pF,3300pF,4700pF,5000pF,5500pF,6800pF,7000pF,9000pF,10000pF,0.01μF,0.012μF,0.015μF,0.018μF,0.022μF,0.025μF,0.027μF,0.028μF,0.045μF,0.050μF,0.056μF,0.075μF,0.08μF,0.1μF,0.15μF,0.21μF,0.3μF,0.75μF,0.8μF,1μF,0.015μF,0.060μF,0.062μF,0.150μF,0.200μF,0.250μF,0.250μF,0.300μF,0.450μF,0.500μF,0.7μF,0.750μF,0.990μF,1.0μF,1.2μF,1.4μF,1.5μF,2.1μF,2.8μF,4.0μF,5.2μF,
其中1000pF=1nF 1000000pF=1μF 1000nF=1μF 1μF=1000nF=1000000pF 1F=1000000μF
工作电流Rated Current :
0.06A,0.15A,0.25A,0.3A,0.45A,0.5A,1A,2A,3A,4A,5A,10A,15A,25A,50A,100A
额定电压Rated Voltage :
直流:5V,28V,35V,50V,60V,70V,80V,100V,150V,200V,250V,275V,300V,330V,350V,400V,450V,500V,600V,750V,1250V,2500V
交流:70V,85V,90V,115V,125V,140V,200V,220V,230V,240V,330V,350V
耐电压Dielectric Withstanding Voltage :
直流:额定电压的2.5倍 交流:额定电压的6倍的直流电压
工作温度Working Temperature Range:
E:-10-+85℃ F:-25-+85℃ G:-30-+125℃
H:-40-+85℃ I:-55-+85℃ J:-55-+125℃
EMI 滤波器的构成
滤波电容
滤波器所用的电容一般为陶瓷电容。由于其物理结构,这种陶瓷电容又称为穿心式电容。
穿心式电容自电感较普通电容小得多,故而自谐振频率很高。同时,穿心式设计,也有效地防止了高频信号从输入端直接耦合到输出端。这种低通高阻的组合,在 1GHz 频率范围内,提供了极好的抑制效果。
最简单的穿心结构是由内外电极和陶瓷构成的一个( C 型)或两个电容( Pi 型)。
这种电容的容量可从 10pF ,工作电压可达 2000VDC 。管式穿心电容因为其同轴性,即使在 10GHz 频率,也不会产生明显的自谐振。
滤波电感
滤波电感一般采用铁氧体材料,它可以方便地与穿心电容组合起来,形成复合滤波器,在高性能滤波器中,也采用线绕电感。但需注意,铁氧材料在大电流下会发生磁饱和,降低滤波器效能。
安装方式Filter Installation Style :
H:焊接式Solder-in Style Filters I:螺栓式 Screw Threaded Style Filters
螺纹直径公制范围Thread Size :
M3,M4,M5,M6,M8,M9
简介
滤波器中采用的穿心式电容一般为陶瓷电容。