C98043-A1682-L1模块C98043A1682L1
C98043-A1682-L1模块C98043A1682L1
C98043-A1682-L1模块C98043A1682L1
C98043-A1682-L1开关电源模块
通信业的迅速发展极·的推动了通信电源的发展。高频小型化的开关电源及其技术已成为现代通信供电系统的主流。在通信领域中,通常将整流器称为一次电源,而将直流-直流(DC/DC)变换器称为二次电源。一次电源的作用是将单相或三相交流电网变换成标称值为48V的直流电源。当前在程控交换机用的一次电源中,传统的相控式稳压电源己被高频开关电源取代,高频开关电源(也称为开关型整流器SMR)通过MOSFET或IGBT的高频工作,开关频率一般控制在50-100kHz范围内,实现高·率和小型化。近几年,开关整流器的功率容量不断扩大,单机容量己从48V/12.5A、48V/20A扩大到48V/200A、48V/400A。
因通信设备中所用集成电路的种类繁多,其电源电压也各不相同,在通信供电系统中采用高功率密度的高频DC-DC隔离电源模块,从中间母线电压(一般为48V直流)变换成所需的各种直流电压,这样可大大减小损耗、方便维护,且安装、增加非常方便。一般都可直接装在标准控制板上,对二次电源的要求是高功率密度。因通信容量的不断增加,通信电源容量也将不断增加。
YASKAWA ELECTRIC USA-MED-30MA2SE USAMED30MA2SE
YASKAWA ELECTRIC JANCD-CP02 JANCDCP02
YASKAWA ELECTRIC CIMR-P5U20550F CIMRP5U20550F
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THOMSON INDUSTRIES 345115546300 345115546300
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TA INSTRUMENTS 931001.901 931001901
STROMBERG SAFUS75F400 SAFUS75F400
SQUARE D TVS-2EMA24AIC TVS2EMA24AIC
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PSC INC 1803011-2 18030112
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ORMEC MAC-A055D/K1A MACA055DK1A
OPTEK C4202 C4202
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NEC C-526 C526
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MODICON PC-L984-785 PCL984785
MODICON PC-E984-685 PCE984685
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MODICON MM-PM22-200 MMPM22200
MODICON AS-S911-001 ASS911001
MODICON AS-S911-000 ASS911000
MODICON AS-9003-180 AS9003180
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MOCON 001-049 001049
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PXAH 401 3BSE017235R1 1
Millmate Controller 400R 型号:PXAA 401;订货号:3BSE 017233R1 1
3BSE017233R1
型号:PMSA 122;订货号:3BSE 005677R1 1
型号:PMSC 122E20S;订货号:3BSX 800503-113;长度:20米
型号:PMSC 122E20S;订货号:3BSX 800503-120;长度:20米
SCHNEIDER ELECTRIC LEXIUM 32 LXM32MD30N4 数量1
ABB SACE E2N 20, Iu=2000A, Ue=690V, 50-60Hz 3P 带手操
CVAR-01C 3AUA0000044173 1
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PCI-1734-CEADVANTECH1
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