【应用】基于硕凯电子的GDT、TVS和MOV设计的POE系统防雷保护方案
随着国民经济的发展，以太网供电技术（POE）的发展势头十分强劲，这一技术的发展可简化用电设备的安装和部署，因而省去了需要设置独立输电的专用线。现如今太网供电技术（POE）广泛用于安防、通信以及智能电网等工业系统，用以实现系统内的数据、视频传输、流量控制、以及通过总线实现供电。但由于工业以太网工作环境的严苛，对于POE端口的浪涌及静电防护必不可少，硕凯电子针对POE系统的防雷保护设计了以下方案。
一、应用背景
1、气候变暖，雷雨天气增多
2、POE电源和信号共存，因此防护难度增加
二、防护方案与硕凯器件
GDT【UN1812- 300CSMD】直流标称电压300±20%V，冲击电流（8/20μS）2.0KA，电容值＜1.0pF，电阻值＞1GΩ，高弧光压产品；
TVS1【ESD03V32D-LC】Vrwm：3.0V，Vb：4.0V；防静电能力(接触/空气)：8KV/15KV；结电容（f=1MHz）：1. 2pF ；封装：SOD323；反应时间快；
TVS2【SMCJ58CA】Vbr：64.4-71.2V；Ir：5μA；Vrwm：58.0V，Ipp：16.1A；Vc (V) :93.6V;封装：SMC/DO-214AB
MOV【10D820K 】压敏电压（at 1mA）：74V-90V，突波电流耐量（8/20μS）：2500A，最大抑制电压（at 5A）：135V
三、方案应用
1、POE供电器
2、POE分离器
3、POE连接器
4、AP
四、方案说明与注意事项
1、此方案采用GDT在变压器前端做共模（八线）浪涌防护
2、网络变压器后级用小体积，低结电容的TVS1吸收差模能量，该TVS反应时间快，兼顾防护静电功能
3、此POE端口方案符合802. 11电气标准
4、此POE端口方案满足I EC61000-4- 5、GBT17626. 5等浪涌测试标准
5、此POE端口方案满足I EC61000-4- 2、GBT17626. 2等静电测试标准
6、可通过10/ 700μS（内阻40ohm) 和1. 2/ 50-8/ 20μS浪涌测试
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本文由宝丁转载自硕凯电子，原文标题为:POE系统的防雷保护设计，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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电路保护主要有两种形式：过压保护和过流保护。电路保护最常见的器件有GDT、MOV和TVS。在选择电路保护器件的时候我们要知道保护电路不应干扰受保护电路的正常行为。硕凯电子将在本文探讨GDT、MOV和TVS三大常见的电路保护器件的异同点。
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硕凯电子（Socay）GDT陶瓷气体放电管选型指南
目录- Surface Mount 2-Electrode Gas Discharge Tube 2-Electrode Gas Discharge Tube High Voltage 2-Electrode Gas Discharge Tube 3-Electrode Gas Discharge Tube Switching Spark Gap
型号- UN3E8-150HP,UN3E8-150HM,UN2E8-150M,UN2E6-75LSMD,UN2E5-350L,UN1210-400BSMD,UN2E8-230HL,UN2E5-600LL,UN2E8-2000L,UN2E8-420HSMD,UN3E5-420L,UN3E8-90HP,UN3E8-90HM,UN3E5,UN3E6,UN2E5-470LSMD,UN3E8-600H,UN2K8-400SMD,UN3E8,UN2E8-250MSMD,UN3E6-350M,UN3E5-75LSMD,UN2E6-300LSMD,UN3E8-420HMF,UN2E8-300HSMD,UN2E5-230L,UN3E5-75LM,UN3E8-75HM,UN2K8-300L,UN3E8-75HP,UN2E8-300H,UN3E8-75H,UN2K8-600SMD,UN2E8-150H,UN2K8-450,UN2E8-300M,UN2E8-250HSMD,UN3E6-230M,UN2E5-470LL,UN2E8-150HSMD,UN2E6-150LSMD,UN2E5-350LSMD,UN1812-600CSMD,UN2E5-600LSMD,UN2E5-1600DL,UN3E5-150L,UN2K8-XXXSMD,UN2E8-420H,UN2E5-2500DL,UN3E6-XXXM,UN2E8-800H,UN3E6-XXXL,UN2E5-90L,UN2E8-420M,UN3E5-75L,UN2K8-800SMD-1,UN1206-400ASMD+,UN2E6-400LSMD,UN2E8-800M,UN3E8-230H,UN2H8-XXXLL,UN2E5-XXXL,UN3E6-150MM,UN2E8-75MSMD,UN2E5-3500D,UN2E5-250LL,UN2E8-150MSMD,UN2E8-800ML,UN2E5-XXXD,UN2E5-470L,UN3E8-90HMF,UN1206-470ASMD,UN2E8-XXXM/HL,UN3E5-300L,UN2K8-800L,UN2E8-75ML,UN2E8-2500L,UN1210-150BSMD,UN2E8-150ML,UN3E6-470M,UN2E8-90ML,UN2E8-1000L,UN2E8-470MSMD,UN3E5-470LM,UN2E8-800MSMD,UN2E8-1000LL,UN2E5-1000DL,UN3E6-XXXMM,UN2E8-800HL,UN2E8-420HL,UN2H8-4000LL,UN1812-470CSMD,UN3E8-350HMF,UN3E8-XXXHM,UN1210-470BSMD,UN2E6-350LSMD,UN2E5-1000D,UN2E8-470H,UN2E5-230LL,UN2K8-230SMD,UN2E8-470HSMD,UN2E8-2000LL,UN2E5-1600D,UN2E8-2500LL,UN2E8-250M,UN3E5-150LM,UN3E6-XXXLM,UN3E8-75HMF,UN3E8-XXXHP,UN2E8-470HL,UN2E5-90LSMD,UN1812-200CSMD,UN3E8-250HM,UN2E8-230ML,UN3E8-300HMF,UN3E5-XXXLSMD,UN2E5-2700D,UN3E8-250HP,UN2E5-230LSMD,UN2E8-75HSMD,UN2E8-2700L,UN3E5-350LSMD,UN3E5-420LM,UN3E6-250M,UN2K8-800,UN3E5-250LSMD,UN2K8-450L,UN2E5-XXXDL,UN2K8-600L-1,UN1206-230ASMD,UN2E8-3000LL,UN2K8-600-1,UN3E5-600LM,UN2E5-600L,UN3E6-75M,UN2H8-6000L,UN2E5-300LL,UN2E8-230HSMD,UN2E8-250H,UN2E8-300HL,UN2H8-4500LL,UN2K8-600SMD-1,UN3E8-230HMF,UN3E6-150M,UN2E8-90M,UN3E5-150LSMD,UN3E6-420MM,UN3E8-600HM,UN2E8-90H,UN2E8-230MSMD,UN3E8-600HP,UN2E8-800HSMD,UN2E8-420MSMD,UN3E5-250L,UN1210-420BSMD,UN1812-300CSMD,UN2E5-350LL,UN2E8-3500LL,UN1210-230BSMD,UN2K8-350,UN2K8-230,UN2E8-350HL,UN3E6-250MM,UN2E6-SMD,UN3E6-420M,UN2E5-150LSMD,UN3E5-300LSMD,UN1812-400CSMD,UN3E5-350L,UN2K8-500SMD,UN2E5-800LL,UN3E8-90H,UN2E6-600LSMD,UN2E8-90MSMD,UN3E5-XXXLM,UN2K8-230L,UN2E5-800L,UN3E8-470HM,UN2E8-600H,UN3E8-300HP,UN2E8-90HL,UN3E8-470HP,UN2E8-470ML,UN3E8-300HM,UN2E8-600M,UN3E6-75MM,UN3E6-470MM,UN2K8-500,UN3E6-300M,UN3E8-350HM,UN3E8-350HP,UN2E5-2000D,UN3E8-XXXHMF,UN3E5-470L,UN3E5-XXXL,UN1206-420ASMD,UN2K8-600L,UN1812-230CSMD,UN3E8-600HMF,UN2E8-600HSMD,UN3E6-300MM,UN2E5-300L,UN2K8-300SMD,UN2E5-400LL,UN2E8-300ML,UN3E5-250LM,UN2E8-XXXM/HSMD,UN2E8-350ML,UN2E8-600ML,UN1206-150ASMD,UN1812-350CSMD,UN3E8-420HP,UN2E8-350M,UN2K8-XXXL,UN1812-90CSMD,UN2H8-5000L,UN3E6-350MM,UN3E8-420HM,UN2E8-250HL,UN2E8-XXXLL,UN2E5-90LL,UN2K8-500L,UN3E5-600L,UN2E8-600MSMD,UN3E5-420LSMD,UN2E8-1600L,UN2K8-350SMD-2,UN2H8-5000LL,UN2K8-350SMD-1,UN2E8-230M,UN3E6-90MM,UN3E6-600MM,UN3E8-800H,UN2E8-230H,UN3E8-420H,UN2K8-600,UN2E6-90LSMD,UN2E5-75L,UN3E5-90L,UN2E8-XXXL,UN2E8-90HSMD,UN2H8-5500L,UN2K8-450SMD,UN2E8-470M,UN3E5-230L,UN3E5-230LSMD,UN2K8-350L,UN2E5-2700DL,UN2H8-5500LL,UN2E5-75LL,UN3E8-800HMF,UN2E5-SMD,UN1206,UN2E8-XXXML,UN3E8-300H,UN1210,UN3E8-150H,UN2E8-350H,UN2E5-400LSMD,UN1206-200ASMD,UN2K8-800L-1,UN3E5-300LM,UN2K8-350SMD,UN2E5-2000DL,UN3E8-470H,UN2E5-400L,UN2E8-350HSMD,UN1206-350ASMD,UN2K8-300,UN2K8-XXX,UN2E5-250L,UN2E8-3000L,UN3E8-XXXH,UN2E6-470LSMD,UN2E8-600HL,UN3E5-350LM,UN3E8-800HP,UN2E8-350MSMD,UN1812-150CSMD,UN2E8-2700LL,UN3E5-90LSMD,UN3E8-250HMF,UN2H8,UN2E5-3000D,UN3E6-230MM,UN2E5-3500DL,UN3E8-350H,UN2E5-XXXLL,UN2H8-6000LL,UN3E8-150HMF,UN2E5-150L,UN1206-400ASMD,UN1210-350BSMD,UN2E8-3500L,UN3E6-600M,UN3E8-800HM,UN2E6-230LSMD,UN3E5-470LSMD,UN2E5-200LSMD,UN2K8-800SMD,UN1812,UN3E5-90LM,UN2E8-XXXM/H,UN2E5-150LL,UN1812-400CSMD+,UN2K8-350L-2,UN2K8-350-2,UN2H8-4500L,UN1210-300BSMD,UN2E8-75M,UN2E5,UN2E8-300MSMD,UN2K8-350L-1,UN3E8-250H,UN2K8-400,UN2E8-XXXHL,UN2E8-75H,UN2E8-1600LL,UN2E8,UN2E8-150HL,UN2K8-350-1,UN1206-300ASMD,UN3E5-230LM,UN2E5-3000DL,UN3E8-470HMF,UN2E8-420ML,UN3E6-90M,UN2E5-300LSMD,UN2E8-75HL,UN3E5-600LSMD,UN2K8-800-1,UN2H8-4000L,UN1210-200BSMD,UN2E5-2500D,UN2H8-XXXL,UN2K8-400L,UN2E8-250ML,UN3E8-230HP,UN3E8-230HM
硕凯电子（Socay）MOV压敏电阻选型指南
目录- Radial Lead Metal Oxide Varistor
型号- 14D181K,40D271K,25D301K,10D681KJ,10D221KJ,07D121KJ,14D821K,20D470K,20D361K,14D182KJ,10D112KJ,40D911K,14D180K,07D220K,32D361K,05D621K,53D122K,07D680K,14D820K,25D751K,10D560KJ,14D301KJ,10D331KJ,20D181KJ,07D241KJ,07D241K,32D241K,32D471K,40D152K,05D511K,07D471K,20D201KJ,10D220KJ,34S621K,05D470KJ,20D431KJ,20D121K,14D390KJ,53D112K,05D361KJ,07D680KJ,14D181KJ,07D471KJ,07D121K,14D182K,53D221K,53D681K,20D471K,20D241K,10D561KJ,20D182KJ,32D122K,10D330KJ,05D820K,07D221KJ,34S821K,14D270KJ,25D511K,05D241KJ,10D511K,40D182K,05D471KJ,05D180K,34S182K,20D151K,14D391KJ,20D781KJ,07D681KJ,07D361K,20D911K,05D121KJ,07D470K,10D621K,07D330KJ,07D561KJ,20D271K,10D121KJ,14D511KJ,32D221K,32D112K,07D220KJ,14D621KJ,53D361K,32D681K,10D680KJ,14D271KJ,10D241KJ,10D751K,32D331K,10D911KJ,53D241K,14D781KJ,32D561K,25D621K,40D391K,53D471K,07D560KJ,05D680KJ,32D102K,20D331KJ,10D470KJ,40D122K,20D431K,10D820KJ,20D681KJ,20D201K,10D301K,20D221KJ,20D781K,25D681K,10D361KJ,05D201K,25D122K,05D431K,34S301K,07D151KJ,07D301K,20D561KJ,53D301K,05D390KJ,20D330KJ,40D112K,40D221K,40D681K,25D561K,25D331K,34S201K,34S431K,40D,07D431K,10D821KJ,10D471KJ,07D201K,20D220KJ,14D471K,05D511KJ,20D911KJ,20D151KJ,14D241K,40D331K,40D561K,32D391K,25D221K,53D,25D112K,05D621KJ,05D270KJ,14D911KJ,53D751K,14D151KJ,14D470K,20D560KJ,07D271KJ,14D361K,05D391KJ,07D470KJ,32D271K,14D270K,14D391K,05D751K,53D331K,53D561K,20D112K,20D220K,20D680K,14D470KJ,53D102K,05D151KJ,32D911K,14D390K,25D102K,07D781K,40D361K,05D271KJ,34S511K,10D431K,07D361KJ,10D201K,10D781K,20D122K,07D820KJ,20D241KJ,20D471KJ,07D330K,05D301K,07D681K,07D560K,20D680KJ,32D,20D,40D241K,40D471K,32D152K,53D781K,20D102K,07D221K,05D820KJ,10D331K,10D330K,10D560K,10D681K,10D101K,14D471KJ,20D331K,20D561K,53D431K,53D201K,10D151KJ,14D271K,14D361KJ,07D561K,25D431K,25D201K,20D101K,07D101K,07D331K,34S751K,10D561K,10D102K,14D911K,20D221K,20D560K,20D681K,20D330K,07D821KJ,25D781K,14D151K,20D470KJ,10D,05D121K,20D621K,34S122K,05D201KJ,20D361KJ,05D431KJ,34S,20D820KJ,14D102K,32D511K,40D301K,25D271K,10D511KJ,14D121KJ,14D821KJ,05D241K,20D511K,14D241KJ,05D471K,10D271KJ,10D220K,10D221K,05D180KJ,10D112K,10D680K,14D101K,14D331K,14D561K,32D621K,25D391K,07D181KJ,07D301KJ,20D821KJ,34S241K,34S471K,05D361K,07D621K,10D241K,05D470K,10D471K,14D680KJ,14D431K,14D201K,25D,25D152K,40D751K,14D820KJ,07D751KJ,10D270KJ,10D121K,20D121KJ,10D621KJ,10D391KJ,25D911K,14D781K,25D361K,14D,40D102K,14D330KJ,05D301KJ,14D560KJ,34S102K,05D101K,05D561K,05D331K,07D511KJ,07D391KJ,14D221KJ,14D681KJ,14D122K,14D112KJ,10D751KJ,40D781K,05D221K,05D330K,05D560K,05D681K,34S781K,20D301K,07D511K,10D361K,10D390KJ,10D470K,20D122KJ,53D511K,07D270KJ,14D121K,10D182KJ,14D331KJ,40D201K,40D431K,14D561KJ,34S112K,34S681K,05D220K,07D390KJ,34S221K,05D680K,14D220KJ,53D621K,14D112K,14D221K,14D560K,14D681K,10D301KJ,07D621KJ,14D122KJ,05D,14D330K,25D471K,25D241K,20D751K,07D751K,34S561K,20D271KJ,34S331K,32D821K,05D181KJ,14D680K,10D181KJ,14D220K,14D102KJ,53D391K,10D911K,07D271K,07D781KJ,10D271K,05D391K,05D270K,05D390K,20D112KJ,34S271K,05D220KJ,07D,20D511KJ,07D151K,34S911K,53D271K,32D781K,10D151K,20D270KJ,05D681KJ,20D621KJ,53D911K,20D101KJ,20D182K,32D201K,32D431K,10D180KJ,14D751K,20D391KJ,05D560KJ,05D751KJ,14D101KJ,07D390K,10D201KJ,14D431KJ,20D391K,14D621K,20D270K,05D221KJ,07D101KJ,10D390K,05D561KJ,05D330KJ,53D152K,07D270K,07D391K,10D270K,07D331KJ,05D181K,20D390K,34S391K,14D511K,20D102KJ,10D391K,40D821K,20D390KJ,10D781KJ,10D182K,07D180KJ,07D821K,53D821K,14D180KJ,32D301K,25D182K,40D511K,53D182K,05D331KJ,34S361K,10D102KJ,40D621K,20D821K,07D180K,10D180K,10D820K,05D151K,34S152K,10D431KJ,14D201KJ,20D181K,25D821K,32D751K,14D751KJ,07D431KJ,20D301KJ,07D201KJ,20D751KJ,20D820K,07D181K,05D101KJ,10D181K,10D821K,07D820K,05D271K,10D101KJ,14D301K,20D180K,20D180KJ
硕凯电子压敏电阻选型表
提供硕凯直径5D、7D、10D、14D、20D、25D、32D以及SM4032系列MOV压敏电阻产品选型，VAC电压从11V~1000V，浪涌电流高达20000A
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产品型号
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品类
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系列(Series)
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VAC(V)
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VDC(V)
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V1mA(V)
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IP(A)
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VC(V)
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I Standard(1 Time)(A)
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I Standard(2 Times)(A)
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Maximum Energy(10/1000μs)Standard(J)
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Rated Power(W)
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Typical Capacitance@1KHz(pF)
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05D180K
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压敏电阻
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05D Series
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11V
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14V
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18V(15V~21.6V)
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1A
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40V
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100A
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50A
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0.4J
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0.01W
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1400pF
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选型表 - 硕凯电子 立即选型
硕凯电子 瞬态抑制二极管选型表
TVS(瞬态抑制二极管)，半导体材质，用于浪涌和静电防护，在小浪涌防护中广泛使用，速度快，封装小，残压低
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产品型号
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品类
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Uni/Bi
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Marking
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VRWM(V)
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VBR(V)@IT(Min.)
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VBR(V)@IT(Max.)
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IT(mA)
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VC@IPP(V)
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IPP(A)
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IR@VRWM(uA)
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PPPM(W)
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Package
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SMF5.0A
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瞬态抑制二极管
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Uni
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FE
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5V
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6.4V
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7V
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10mA
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9.2V
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21.74A
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400uA
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200W
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SOD-123
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选型表 - 硕凯电子 立即选型
【选型】国产TVS瞬态抑制二极管用于POE摄像头保护电路设计，ESD等级±15kV，峰值脉冲功率1500W
针对摄像头POE交换芯片的ESD防护应用，推荐国产硕凯电子的TVS瞬态抑制二极管SMCJ51CA，双向防护，工作电压51V，最小击穿电压56.7V，反向漏电流5μA，峰值脉冲功率1500W，ESD防护等级满足IEC61000-4-2标准。
【经验】压敏电阻防雷的工作原理及特点
压敏电阻器相当于一个可变电阻，它是并联于电路中的，当电力线被雷击时，雷电波的高电压使压敏电阻击穿，雷电流通过压敏电阻流入大地，使电力线上的电压被钳制在安全范围内。压敏电阻的性能稳定、通流能力大，由于其突波承受能力取决于它的物理尺寸，因而有可能获得不同的浪涌电流值。
陶瓷气体放电管SC3E5-150LSMD直流击穿电压150V，浪涌通流量10kA@8/20μS，适用于开关变换器
为了避免雷电、线路故障等原因产生的浪涌电压损害开关电源或干扰后级的电子设备，需要将浪涌电压控制在一定的范围内。硕凯电子顺势推出广泛应用于保护开关变换器的陶瓷气体放电管SC3E5-150LSMD。
电子商城
现货市场
服务
提供消费和车载电子静电摸底测试服务，测试接触放电和空气放电士20KV±20%，并将针对测试出的问题给出ESD整改方案。支持到场/视频直播测试，资深专家全程指导。
实验室地址： 深圳 提交需求>
提供全面表征产品器件耗电特征及功耗波形、快速瞬态效应、电源优化、表征和仿真测试服务，使用直流电源分析仪测量精度达50µV，8nA，波形发生器带宽100kHz，输出功率300W，示波器200kHz，512 kpts
实验室地址： 深圳/苏州 提交需求>
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授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
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