【应用】顺络RJ45网络接口POE供电端口雷电防护方案简析

时间： 2022-11-22 来源：顺络官网

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顺络RJ45网络接口POE供电端口雷电防护方案，详细内容如下。

RJ45网络接口POE供电端口防护要求

●对于RJ45网络连接端口，部分已经具有POE直流供电的功能。IEC61000-4-5要求，端口POE供电必须进行共模、差模雷电及浪涌防护，满足客户整机技术。

●由于RJ45端口空间狭小，最好采用贴片式小尺寸且可以达到该端口的雷电及浪涌防护标准的防护产品。

图1 RJ45网络接口盒

●POE电源线对地共模雷电承受：4kV（1.25/50μS）或100A（8/20μS）。

●POE电源线间差模雷电承受：2kV（1.25/50μS）或50A（8/20μS）。

保护器件性能比较

表 1

过电压防护原理

图 2

雷电防护元件比较

表 2

●响应时间比较是在引线式元件结构下比较的。若是贴片式结构，压敏与TVS响应时间不大于2.5ns，GDT响应时间不大于5ns。

●以上三种元件可以用于不同的线路保护位置，相对比较压敏电阻具有很好的性价比。

压敏电阻与TVS性能比较

表 3

●工作电压5.5~100Vdc（SMDJ* 11~100Vdc），两类产品间工作电压对应替换，压敏电阻尺寸远小于TVS，且压敏电阻性能优于相对应TVS，但其成本降低30%；

●与其他过电压保护器件相比，压敏电阻在温度特性、阻燃特性、EMC效果方面具有更优性能。

图 3

随着工作电压增高，通过TVS的脉冲电流能力大幅度下降，而通过SDVL压敏电阻的脉冲电流能力几乎不变；因此，压敏电阻可更好地用于高电压、高脉冲电流幅值的线路中，进行过电压抑制及浪涌吸收。

1.EMC效果

●TVS/GDT/PESD没有吸能能力，脉冲能量一直在电路中存在，在地线上会形成Ldi/dt电磁干扰，须并联电容降低di/dt

图 4

●压敏电阻具有内阻，能够吸收部分能量，降低脉冲电流幅值及di/dt，在线路中具有EMC功能

图 5

2.温度特性

●片式压敏电阻陶瓷属热良导体，具有很好的散热能力，在高达85℃时仍保持脉冲电流稳定的温度特性。

●TVS因其材料特性，温度特性从25℃脉冲电流开始衰减。

图 6 脉冲电流温度降额曲线

RJ45网络接口POE供电端口雷电防护方案

表 4

●14~56Vdc、60~100Vdc线路用高脉冲电流的压敏电阻制造技术难度较大，引线式压敏电阻几乎空缺

●片式压敏电阻可以弥补该空缺

表 5供电电源端用压敏电阻器产品性能表

●对于最大直流工作电压不大于56V的压敏电阻，贴片式产品的耐受脉冲电流远大于引线式产品；

●贴片式压敏电阻的产品尺寸远小于引线式压敏电阻，故在整机空间有限制时，可以采用贴片式压敏电阻，如RJ45端口。

压敏电阻应用——RJ45接口

带有POE供电功能的RJ45接口须进行雷电过电压防护。因RJ45接口内空间有限，合适的元件就是片式压敏电阻。标准的五类网线有四对双绞线，10M BASE-T和100M BASE-T中只用到其中的两对，而1000M BASE-T则四对都用到。针对空闲供电（①）和信号线供电（②）两种方式的防护如下：

图 7

POE供电端口雷电防护方案比较

表 6 方案A和方案B

对于POE供电线路，方案A和方案B都可以达到RJ45接口的雷电防护标准，但鉴于空间和成本考虑，方案A的综合性价比优于方案B。对于脉冲绝缘耐压优良的IC，可采用方案A，对于脉冲绝缘耐压很低的IC，则可考虑共模用压敏电阻、差模用TVS。

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本文由三年不鸣转载自顺络官网，原文标题为:RJ45网络接口POE供电端口雷电防护方案，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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描述- Shenzhen Sunlord Electronics Co.,Ltd. is engaged in development,manufacturer and sales of types of chip electronic components. Sunlord's products focus on magnetic devices,microwave devices,sensitive devices,which are widely used in communications,consumer electronics,computers,automotive electronics,new energy,network equipments,industry electronics,and other fields.

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符合性声明 (Declaration of Conformity)

型号- AMWSA,MPH,AWPR-2,PZ/APZ,MPL,HQ,SPH,MPM,ARCDC,GESD,EPZ,WPH,WPG,WPL,AMCW-B,HZ,WPN,SDMM,SVMH,WTX,WPL SERIES,MQA,HFZ,UPZ,ACSR,SLCP,WPZ,SDCW,SDV,SLFBF,AMCW-P,AMP,HFPZ,MQQ,TWP,ASWPA,SLDA,ALTWR-F,WPL系列,TWS,ALTWR-H,SWRB,ALTWR-G,MZA,ALTWR-C,FA,MWLA,MWTC,SWRH,SLFS,ARLDC,SLFT,ATWPEP,SLBL,SDNT-C,ATWPEQ,ATWS,HPZ,AMWPQ,BW,TPP,AMWLA,AMWPH,SDCL,MWSA,MWSC,CWS,ATWPEF,ACWS,SDVL,SZ,MCL-N,TC,SDNT,SLFD,SDFL,SWPA,GZ,SLFB,MCL-A,MCL,SLFL,SLFH,ATWPPQ

2023.11.07 - 顺络 - 测试报告代理服务技术支持批量订货

【经验】HDMI接口电磁兼容性和过电压防护设计详解

伴随高清，超高清数字视频时代的到来，HDMI在各类AV设备上得到广泛的应用。HDMI接口支持热拔插，具有超高的传输速率，最新的HDMI1.4规范中TypeA传输速率可以达到10.2Gbps, 可以很好满足全高清视频传输需要。本文顺络将从EMC设计和ESD防护两方面对HDMI接口防护设计进行分析并提出相应的对策。

2021-08-21 - 设计经验代理服务技术支持批量订货

顺络压敏电阻选型表

顺络压敏电阻选型表，主要提供以下参数进行选型，Operating Temp：-55℃ ~+125℃；最大工作电压DC(V)：5.5V~455V;额定脉冲耐量Energy 10/1000μs(Joules)：0.003~8Joules；最大工作电压DC RMS(V)：4V~350V.

额定脉冲耐量Energy 10/1000μs(Joules)

额定脉冲耐量Peak Current 8/20μs(Amps)

选型表 - 顺络立即选型

Sunlord's products符合性声明(Declaration of Conformity of Sunlord's products)

型号- MPH,AWPR-2,MPL,HQ,SPH,PZ,MPM,ARCDC,WPH,EPZ,GESD,WPG,WPL,HZ,AMCW-B,WPN,SDWL-F,SDMM,SVMH,WTX,WPL SERIES,MQA,HFZ,UPZ,ACSR,WPZ,SLCP,AMQC,SDCW,SDV,SLFBF,AMP,AMCW-P,HFPZ,MQQ,TWP,ASWPA,SLDA,WPL系列,TWS,SWRB,MZA,FA,MWTC,SWRH,SDWL,SLFS,SLFT,ATWPEP,SLBL,SDNT-C,HPZ,AMWPQ,WL,TPP,BW,AMWPH,MWSA,SDCL,MWSC,ATWPEF,MWSD,SDVL,SZ,MCL-N,TC,SDFL,SDNT,SLFD,SWPA,GZ,SLFB,MCL-A,MCL,SLFL,SLFH,ATWPPQ

2022/7/13 - 顺络 - 测试报告代理服务技术支持批量订货

电感制造商顺络（sunlord）授权世强代理其片式、陶瓷、高频、PoC、功率及车规级电感等

近日，顺络签约世强硬创电商，成为了世强代理的第238家品牌。顺络成立于2000年，主要从事芯片电子元件类型的开发制造，其主要产品包括线叠层片式电感器、绕线片式电感器、共模扼流器、压敏电阻器、NTC 热敏电阻器、LC 滤波器、各类天线、NFC 磁片、无线充电线圈组件、电容、电子变压器等。另外，顺络还推出了满足AEC-Q200的车规级产品，包括EMC元件、电感、变压器、无线充电圈等。顺络已在平台陆续

2020-12-26 - 公司动态代理服务技术支持批量订货

SDV Series Multilayer Chip Varistor

型号- SDV1608A140C251□PTF,SDV1608E180C180□PTF,SDV1608H220C050YPTF,SDV1005H140C100□PTF,SDV2012,SDV1005E090C300□PTF,SDV1005E180C300□PTF,SDV1005H220C120□PTF,SDV1608S5R5C100□PTF,SDV1005S180C0R5YPTF,SDV1608E220C500□PTF,SDV1608S090C120□PTF,SDV1005S090C0R5YPTF,SDV1005S5R5C050YPTF,SDV-H,SDV1608,SDV1608A220C141□PTF,SDV1005S140C030YPTF,SDV1608H260C100□PTF,SDV1608E220C800□PTF,SDV2012A140C701□PTF,SDV1608E220C101□PTF,SDV1608A300C141□PTF,SDV1608E180C101□PTF,SDV SERIES,SDV,SDV1608S090C100□PTF,SDV2012E180C101□PTF,SDV-A,SDV1608A260C161□PTF,SDV-E,SDV1608E180C800□PTF,SDV2012E260C800□PTF,SDV1608S5R5C0R5YPTF,SDV2012A220C401□PTF,SDV1608S5R5C120□PTF,SDV1608A180C141□PTF,SDV1608S090C010YPTF,SDV1608E140C300□PTF,SDV1608A220C121□PTF,SDV1005E090C800□PTF,SDV1608H260C0R5YPTF,SDV2012A090C701□PTF,SDV1608 SERIES,SDV1608H,SDV1608A090C201□PTF,SDV1608A220C161□PTF,SDV1005H260C020YPTF,SDV1005H260C0R5YPTF,SDV1005 SERIES,SDV1608E,SDV1608H300C100□PTF,SDV1608E260C500□PTF,SDV1608H180C100□PTF,SDV1608E260C180□PTF,SDV1608H260C010YPTF,SDV1005E140C180□PTF,SDV1608H220C030YPTF,SDV1005S360C050YPTF,SDV1608H140C120□PTF,SDV1005H180C050YPTF,SDV1608S5R5C020YPTF,SDV1005H TYPE,SDV1005H260C030YPTF,SDV1005H140C120□PTF,SDV1005H220C050YPTF,SDV1608A,SDV1608E220C300□PTF,SDV1608S090C020YPTF,SDV1005S420C050YPTF,SDV1608E180C300□PTF,SDV2012A140C401□PTF,SDV1005H180C100□PTF,SDV1608A090C361□PTF,SDV2012A220C251□PTF,SDV1608E140C800□PTF,SDV1608E090C101□PTF,SDV1608A140C121□PTF,SDV1608H220C100□PTF,SDV1608S140C030YPTF,SDV1608E090C500□PTF,SDV1005S5R5C120□PTF,SDV1608A090C141□PTF,SDV1005E180C800□PTF,SDV1005S180C030YPTF,SDV1608S180C010YPTF,SDV1608E090C180□PTF,SDV1005S140C020YPTF,SDV1608E TYPE,SDV1608H TYPE,SDV1608S140C0R5YPTF,SDV2012A180C701□PTF,SDV1005S140C050YPTF,SDV2012E,SDV1005S180C020YPTF,SDV2012A300C181□PTF,SDV1005E220C180□PTF,SDV1005S090C020YPTF,SDV1005,SDV1608A180C231□PTF,SDV1005H260C100□PTF,SDV1608H260C030YPTF,SDV1608A090C231□PTF,SDV1005E TYPE,SDV1608A260C121□PTF,SDV2012A090C102□PTF,SDV1005S090C010YPTF,SDV1608S090C050YPTF,SDV1608S5R5C050YPTF,SDV1005E140C800□PTF,SDV1005E140C500□PTF,SDV2012A220C501□PTF,SDV1608E180C600□PTF,SDV2012A260C401□PTF,SDV1005S5R5C010YPTF,SDV1608S180C0R5YPTF,SDV1608H140C100□PTF,SDV1005S5R5C100□PTF,SDV1608H220C120□PTF,SDV1005S090C120□PTF,SDV1005E090C180□PTF,SDV1005E220C500□PTF,SDV1005S180C010YPTF,SDV1608A180C121NPTF,SDV1608A TYPE,SDV2012A140C901□PTF,SDV1608E090C300□PTF,SDV2012A TYPE,SDV1608A180C361□PTF,SDV2012A180C501□PTF,SDV1005S5R5C020YPTF,SDV1005S140C0R5YPTF,SDV1608S,SDV1005E090C500□PTF,SDV1608S5R5C030YPTF,SDV1608S140C020YPTF,SDV1608E260C300□PTF,SDV1005S090C030YPTF,SDV1608H480C100□PTF,SDV1608A220C231□PTF,SDV1005E220C150□PTF,SDV1608S090C030YPTF,SDV1608A180C121□PTF,SDV2012A260C251□PTF,SDV1005E180C500□PTF,SDV1005S5R5C030YPTF,SDV1608S140C050YPTF,SDV1608S5R5C010YPTF,SDV1608E140C500□PTF,SDV1608A140C141□PTF,SDV1608A140C361□PTF,SDV1608E140C101□PTF,SDV1005S090C100□PTF,SDV1608A090C121□PTF,SDV1005H220C100□PTF,SDV1608H260C120□PTF,SDV1608S180C030YPTF,SDV1005S140C010YPTF,SDV1005E140C300□PTF,SDV1608A300C121□PTF,SDV1608E140C180□PTF,SDV1608H180C050YPTF,SDV1005S,SDV1608S090C0R5YPTF,SDV2012A180C301□PTF,SDV1005S090C050YPTF,SDV1608S180C020YPTF,SDV-E SERIES,SDV-H SERIES,SDV2012E TYPE,SDV-A SERIES,SDV1005H260C120□PTF,SDV1005S TYPE,SDV1608E090C800□PTF,SDV2012E300C500□PTF,SDV1608S140C010YPTF,SDV1005E180C150□PTF,SDV1005E180C180□PTF,SDV1608H260C020YPTF,SDV1608S TYPE,SDV1005E220C300□PTF,SDV2012A300C301□PTF,SDV1005H,SDV1608E220C180□PTF,SDV1005E,SDV1005H260C010YPTF,SDV2012E220C101□PTF,SDV1005H220C030YPTF,SDV1005S5R5C0R5YPTF,SDV1608H180C120□PTF,SDV2012A

2023/3/23 - 顺络 - 数据手册代理服务技术支持批量订货查看更多版本

SDV Series Multilayer Chip Varistor

型号- SDV1608E180C180□PTF,SDV1608H220C050YPTF,SDV1005H140C100□PTF,SDV1005E090C300□PTF,SDV1005H220C120□PTF,SDV1005S090C0R5YPTF,SDV1608A5R5C121□PTF,SDV-H,SDV1608A220C141□PTF,SDV0603S5R5C0R5YPTF,SDV1608H260C100□PTF,SDV1608E220C800□PTF,SDV2012A140C701□PTF,SDV0603S090C0R5YPTF,SDV1608A300C141□PTF,SDV1608E180C101□PTF,SDV,SDV1608A5R5C141□PTF,SDV2012E180C101□PTF,SDV-A,SDV-E,SDV1608S5R5C0R5YPTF,SDV1005H260C030□PTF,SDV1608H180C050□PTF,SDV1608E140C300□PTF,SDV1005E5R5C300□PTF,SDV1608E5R5C800□PTF,SDV1608A220C121□PTF,SDV1005E090C800□PTF,SDV2012A090C701□PTF,SDV1608 SERIES,SDV1608A220C161□PTF,SDV1005H260C020YPTF,SDV1005 SERIES,SDV1608E260C500□PTF,SDV1608H180C100□PTF,SDV1608E260C180□PTF,SDV1608H260C010YPTF,SDV1005E140C180□PTF,SDV1608H220C030YPTF,SDV1608H140C120□PTF,SDV1005E5R5C400□PTF,SDV1608S5R5C020YPTF,SDV1005H140C120□PTF,SDV1005H220C050YPTF,SDV1608E220C300□PTF,SDV1608S090C020YPTF,SDV1608E140C800□PTF,SDV1608A140C121□PTF,SDV1005S5R5C120□PTF,SDV1608A090C141□PTF,SDV1608S180C010YPTF,SDV1608S140C0R5YPTF,SDV2012E,SDV1005S180C020YPTF,SDV1005S090C020YPTF,SDV1608A180C231□PTF,SDV1005E5R5C180□PTF,SDV1005E5R5C500□PTF,SDV1608A260C121□PTF,SDV2012A090C102□PTF,SDV1005S090C010YPTF,SDV1005H180C050□PTF,SDV1005E140C500□PTF,SDV2012A220C501□PTF,SDV1608E180C600□PTF,SDV2012A260C401□PTF,SDV1608S180C0R5YPTF,SDV1005S5R5C100□PTF,SDV1608H220C120□PTF,SDV1005E090C180□PTF,SDV1005S180C010YPTF,SDV2012A140C901□PTF,SDV1608A5R5C361□PTF,SDV1005S5R5C020YPTF,SDV1608S,SDV1005E090C500□PTF,SDV1608S140C020YPTF,SDV1608E260C300□PTF,SDV1005E220C150□PTF,SDV1005E180C500□PTF,SDV1608E140C500□PTF,SDV1608A140C141□PTF,SDV1005S090C100□PTF,SDV1005H220C100□PTF,SDV1608H260C120□PTF,SDV1005S140C010YPTF,SDV1005S140C050□PTF,SDV1005E140C300□PTF,SDV1608E140C180□PTF,SDV1608S090C0R5YPTF,SDV1608S180C020YPTF,SDV1005E5R5C700□PTF,SDV-A SERIES,SDV1005H260C120□PTF,SDV1608E090C800□PTF,SDV2012E300C500□PTF,SDV1608S140C010YPTF,SDV1005E180C180□PTF,SDV1005E5R5C800□PTF,SDV2012E220C101PTF,SDV2012E300C500PTF,SDV2012E220C101□PTF,SDV1005H220C030YPTF,SDV1005S5R5C0R5YPTF,SDV1608H260C030□PTF,SDV2012A,SDV1005S5R5C030□PTF,SDV1608A140C251□PTF,SDV1005E180C300□PTF,SDV1608S5R5C100□PTF,SDV1005S180C0R5YPTF,SDV1608E220C500□PTF,SDV1005S090C050□PTF,SDV1608S090C120□PTF,SDV1608,SDV1608S140C050□PTF,SDV1608E220C101□PTF,SDV SERIES,SDV1608S090C100□PTF,SDV1608A260C161□PTF,SDV1608E180C800□PTF,SDV2012E260C800□PTF,SDV2012A220C401□PTF,SDV1608E5R5C180□PTF,SDV1608E5R5C101□PTF,SDV1608S5R5C120□PTF,SDV1608A180C141□PTF,SDV1608S090C010YPTF,SDV1608S140C030□PTF,SDV1608E5R5C500□PTF,SDV1608H260C0R5YPTF,SDV1608A090C201□PTF,SDV1608H,SDV2012A5R5C122□PTF,SDV1005H260C0R5YPTF,SDV1608E,SDV1608H300C100□PTF,SDV1005E260C300□PTF,SDV-1608H180C100□PTF,SDV1005S5R5C050□PTF,SDV1608A,SDV2012A5R5C901□PTF,SDV1608E180C300□PTF,SDV2012A140C401□PTF,SDV1005H180C100□PTF,SDV1608S5R5C030□PTF,SDV1608A090C361□PTF,SDV2012A220C251□PTF,SDV1608E090C101□PTF,SDV1608H220C100□PTF,SDV1608E090C500□PTF,SDV1005E180C800□PTF,SDV1608E090C180□PTF,SDV1005S140C030□PTF,SDV1005S140C020YPTF,SDV2012A180C701□PTF,SDV0603S5R5C010YPTF,SDV2012A300C181□PTF,SDV1005E220C180□PTF,SDV2012E5R5C180□PTF,SDV1005,SDV 1608 A 180 C121 N P T F,SDV1005H260C100□PTF,SDV1608A090C231□PTF,SDV1608S180C030□PTF,SDV0603 SERIES,SDV0603S090C020YPTF,SDV1005E140C800□PTF,SDV0603S5R5C020YPTF,SDV1608S090C030□PTF,SDV1005S5R5C010YPTF,SDV1608H140C100□PTF,SDV1005S090C120□PTF,SDV1005E220C500□PTF,SDV1608E090C300□PTF,SDV1608A180C361□PTF,SDV2012A180C501□PTF,SDV1005S140C0R5YPTF,SDV0603S090C010YPTF,SDV1608S090C050□PTF,SDV1608H480C100□PTF,SDV1608A220C231□PTF,SDV1608A180C121□PTF,SDV2012A260C251□PTF,SDV1608S5R5C010YPTF,SDV1608A140C361□PTF,SDV1608E140C101□PTF,SDV1608A090C121□PTF,SDV1608S5R5C050□PTF,SDV1005S180C030□PTF,SDV1005E260C180□PTF,SDV1608A5R5C231□PTF,SDV1608A300C121□PTF,SDV1005S090C030□PTF,SDV1005S,SDV2012A180C301□PTF,SDV-E SERIES,SDV-H SERIES,SDV1005E180C150□PTF,SDV1608H260C020YPTF,SDV1005E220C300□PTF,SDV2012A300C301□PTF,SDV1005H,SDV1608E220C180□PTF,SDV1005E,SDV1005H260C010YPTF,SDV1608E5R5C300□PTF,SDV1608H180C120□PTF

2021/09/07 - 顺络 - 数据手册代理服务技术支持批量订货

SVMH Series High Voltage Multilayer Chip Varistor for Surge Suppression

型号- SVMH2016KA171PT181,SVMH5650KA321PT102,SVMH4532 TYPE,SVMH2016 TYPE,SVMH2016KA271PT500,SVMH3225KA191PT401,SVMH3216KA151PT301,SVMH5650KA301PT801,SVMH5650KA271PT801,SVMH4532,SVMH3216KA251PT101,SVMH5650KA231PT152,SVMH,SVMH2016KA301PT500,SVMH4532KA321PT251,SVMH5650 TYPE,SVMH3225KA151PT401,SVMH5650KA231PT202,SVMH5650KA191PT152,SVMH3216KA231PT201,SVMH3225KA301PT301,SVMH3225KA321PT151,SVMH3225 TYPE,SVMH4532KA301PT801,SVMH4532KA171PT801,SVMH4532KA301PT401,SVMH3225KA231PT401,SVMH2016KA191PT101,SVMH2016KA211PT101,SVMH5650KA231PT122,SVMH3216 TYPE,SVMH2016KA321PT500,SVMH3216KA271PT101,SVMH3216KA321PT600,SVMH5650KA191PT122,SVMH3216KA171PT301,SVMH5650KA211PT152,SVMH3216,SVMH5650KA151PT152,SVMH2016KA251PT500,SVMH SERIES,SVMH2016KA251PT700,SVMH2016KA151PT181,SVMH3225KA171PT401,SVMH3216KA301PT101,SVMH3225KA271PT201,SVMH2016KA151PT101,SVMH3216KA211PT201,SVMH5650KA171PT152,SVMH3225KA301PT401,SVMH2016KA231PT101,SVMH3225KA321PT251,SVMH5650KA251PT801,SVMH3225KA301PT201,SVMH2016,SVMH3225,SVMH3225KA251PT201,SVMH5650KA211PT122,SVMH5650KA351PT102,SVMH5650,SVMH3225KA211PT401,SVMH3216KA191PT201

2023/3/23 - 顺络 - 数据手册代理服务技术支持批量订货