【应用】基于硕凯电子的GDT和TSS设计的RS485/232防护方案
许多门禁系统、安防系统、智能交通系统会使用到RS485/232接口，这些系统由于大部分都是位于室外，因此非常容易受到外部干扰尤其是雷电袭击，为了不影响系统的正常工作，在设计这些系统电路时，往往会添加GDT管和TSS管这两种过压保护元件，以达到浪涌保护的目的。
一、应用背景
1、RS485/232走线很长，易有过压现象
2、RS485/232走线置于室外，易受雷击
3、RS485/232走线易受其他线路干扰
二、防护方案与硕凯器件
图1： RS485/232防护方案电路图
陶瓷气体放电管（GDT）
【UN3E5-470LSMD】直流标称电压470±20%V，冲击电流（8/20μS）5kA，电容值＜1.5pF，电阻值＞1GΩ，中等防护级别
【UN3E6-470MM】直流标称电压470±20%V，冲击电流（8/20μS）10kA，电容值＜1.5pF，电阻值＞1GΩ，高等防护级别
半导体放电管（TSS）
【P0080SB】Vdrm：6V；Vs：25V；Vt：4V；Idrm：5μA，Is：800mA，It：2.2A；Ih：50mA，Co：25-150pF，耐10/700μs电压击穿能力：4kV
三、方案应用
1、监控/安防系统
2、门禁系统
3、铁路信号控制灯
4、智能交通系统
5、电表/水表/仪器仪表
6、光端机
四、方案说明与注意事项
1、前端采用通流量大的GDT，泄放大电流
2、后端采用反应时间快的TSS，残压低，有效保护RS485/232芯片
3、中间采用电阻做退耦，让前面GDT更容易动作，达到泄放电流的作用
4、本方案满足IEC61000-4-2、GBT17626.2等静电标准，IEC61000-4-5、GBT17626.5等浪涌测试标准
5、可通过10/700μs（等效内电阻40ohm）、1.2/50-8/20μs测试，具体防护等级需参考GDT和TSS的通流量。
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本文由宝丁转载自硕凯电子，原文标题为:利用GDT管和TSS管设计的RS485/232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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公司简介 GDT陶瓷气体放电管 TVS瞬态抑制二极管 ESD静电保护元件 TSS半导体放电管 MLV贴片压敏电阻 高分子ESD MOV压敏电阻 SPG强效放电管 PPTC自恢复保险丝 贴片磁珠 贴片电感
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硕凯电子（Socay）GDT陶瓷气体放电管选型指南
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
硕凯电子 - 表面贴装2电极气体放电管,3-ELECTRODE GAS DISCHARGE TUBE,高压2电极气体放电管,三电极气体放电管,2电极气体放电管,HIGH VOLTAGE 2-ELECTRODE GAS DISCHARGE TUBE,2-ELECTRODE GAS DISCHARGE TUBE,开关火花隙,气体放电管,SWITCHING SPARK GAP,GDT,SURFACE MOUNT 2-ELECTRODE GAS DISCHARGE TUBE,GAS DISCHARGE TUBES,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
【技术】TSS固体放电管拥有的八点属性总结
TSS，有人叫它固体放电管、也有人叫它半导体放电管，它主要的应用场景就是在一些通讯接口、安防系列、工业、网络系统中，用作于通讯信号端口的防雷保护。本文介绍TSS（固体放电管）拥有的一些特性。
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。
CPXXXXSB Series Thyristor Surge Suppressors (TSS)
本资料介绍了CPXXXXSB系列的晶闸管浪涌抑制器（TSS），这是一种半导体组件。该系列产品适用于调制解调器、电话、线路卡、自动答录机、传真机、SLICs、T1/E1、xDSL、PBXs等多种应用。
硕凯电子 - 晶闸管浪涌抑制器（TSS）,THYRISTOR SURGE SUPPRESSORS (TSS),CP1500SB,CP2600SB,CP0640SB,CP2300SB,CP0900SB,CP0720SB,CP1800SB,CP3100SB,CP0300SB,CPXXXXSB,CP3800SB,CP3500SB,CPXXX0SB,CP1100SB,CP0080SB,CP0220SB,CP1300SB,THEY ARE DESIGNED IN APPLICATIONS,MODEMS,TELEPHONES, LINE CARDS,ANSWERING MACHINES,FAX MACHINES, SLICS, T1/E1, XDSL, PBXS AND MORE.,它们被设计用于应用程序、调制解调器、电话、线路卡、答录机、传真机、SLIC、T1/E1、XDSL、PBX等。
SC2E8系列高压双电极气体放电管（GDT）
该资料介绍了SC2E8系列高压双电极气体放电管（GDT），适用于浪涌保护和高压隔离应用。该系列产品具有非放射性、符合RoHS标准、低插入损耗、优异的快速上升瞬态响应、极低电容等特点。产品适用于CRT终端、CATV设备、天线、电源、医疗电子等领域。
硕凯电子 - HIGH VOLTAGE 2-ELECTRODE GAS DISCHARGE TUBE,气体放电管,GDT,GAS DISCHARGE TUBES,高压2电极气体放电管,SC2E8,SC2E8-6000LL,SC2E8-3000LL,SC2E8-5500L,SC2E8-3600L,SC2E8-3000L,SC2E8 SERIES,SC2E8-1600L,SC2E8-2500LL,SC2E8-5000LL,SC2E8-5500LL,SC2E8-2000LL,SC2E8-XXXLL,SC2E8-1600LL,SC2E8-6000L,SC2E8-4500L,SC2E8-2000L,SC2E8-2700L,SC2E8-1000LL,SC2E8-1000L,SC2E8-3500L,SC2E8-4500LL,SC2E8-5000L,SC2E8-1400L,SC2E8-1400LL,SC2E8-3600LL,SC2E8-XXXL,SC2E8-2700LL,SC2E8-3500LL,SC2E8-4000LL,SC2E8-2500L,SC2E8-4000L,POWER SUPPLIES,电源,有线电视设备,MEDICAL ELECTRONICS,CRT TERMINALS,CATV EQUIPMENT,阴极射线管终端,天线,医学电子学,ANTENNAS
【应用】基于国产TSS设计的ADSL防雷保护方案
ADSL是一种非对称的DSL技术，在一对铜线上支持上行速率512Kbps~1Mbps,下行速率1Mbps~8Mbps，其有效传输距离在3~5公里范围内。本文将介绍ADSL的防雷保护方案及器件，该方案在变压器前端采用硕凯电子反应时间快、体积小的TSS管，在变压器后端采用结电容小、体积小的TVS管。
P0080SB-P4200SB系列晶闸管浪涌抑制器（TSS）
本资料介绍了SO-CAY电子公司的P0080SB至P4200SB系列的晶闸管浪涌抑制器（TSS），这些器件旨在保护宽带设备免受损害过电压瞬变的侵害。该系列提供表面贴装解决方案，使设备符合全球法规标准。
硕凯电子 - 晶闸管浪涌抑制器,TSS,THYRISTOR SURGE SUPPRESSORS,半导体放电管,P0300SB,P1100SB,P2300SB,P4200SB SERIES,P0640SB,P0080SB,P1500SB,P1300SB,P2600SB,P4200SB,P3500SB,P0900SB,P0720SB,P1800SB,PXXX0SB,P3100SB,CPE FROM DAMAGING OVER-VOLTAGE TRANSIENTS,PROTECT BROADBAND EQUIPMENT,MODEMS,DSL FROM DAMAGING OVER-VOLTAGE TRANSIENTS,DSL免受破坏性过电压瞬变的影响,线路卡,保护宽带设备,LINE CARD,CPE免受破坏性过电压瞬变影响,调制解调器
SC2E8系列双电极气体放电管（GDT）
本资料介绍了SC2E8系列二电极气体放电管（GDT）的特性和应用。该系列GDT用于保护电信、CATV网络、移动电话基站等设备的电子电路，具有高绝缘电阻、快速响应瞬态、低电容等特点。
硕凯电子 - 2-ELECTRODE GAS DISCHARGE TUBE,气体放电管,GDT,2电极气体放电管,GAS DISCHARGE TUBES,SC2E8-300ML,SC2E8-800M,SC2E8-XXXML,SC2E8-350HSMD,SC2E8-150ML,SC2E8-420MSMD,SC2E8-420H,SC2E8-800H,SC2E8 SERIES,SC2E8-420M,SC2E8-XXXHL,SC2E8-250H,SC2E8-75MSMD,SC2E8-230H,SC2E8-470MSMD,SC2E8-800MSMD,SC2E8-420HL,SC2E8-230HL,SC2E8-250M,SC2E8-250MSMD,SC2E8-470ML,SC2E8-800HL,SC2E8-600MSMD,SC2E8-420HSMD,SC2E8-300HL,SC2E8-XXXHSMD,SC2E8-75M,SC2E8-90MSMD,SC2E8-90ML,SC2E8-75H,SC2E8-350ML,SC2E8-230MSMD,SC2E8-350H,SC2E8-75ML,SC2E8-420ML,SC2E8-350M,SC2E8-150MSMD,SC2E8-XXXM,SC2E8-250ML,SC2E8-XXXH,SC2E8-800ML,SC2E8-90M,SC2E8-350HL,SC2E8-600HL,SC2E8,SC2E8-90H,SC2E8-75HSMD,SC2E8-230,SC2E8-800HSMD,SC2E8-600M,SC2E8-600H,SC2E8-470H,SC2E8-90HSMD,SC2E8-150HSMD,SC2E8-300MSMD,SC2E8-250HL,SC2E8-90HL,SC2E8-470M,SC2E8-230HSMD,SC2E8-600ML,SC2E8-75HL,SC2E8-350MSMD,SC2E8-150HL,SC2E8-300H,SC2E8-300M,SC2E8-470HL,SC2E8-300HSMD,SC2E8-XXXMSMD,SC2E8-150H,SC2E8-470HSMD,SC2E8-230ML,SC2E8-150M,SC2E8-250HSMD,SC2E8-600HSMD,试验设备,数据线,CATV EQUIPMENT,AIR-CONDITIONING EQUIPMENT,电信SLIC保护,CABLE MODEMS,医学电子学,WLAN路由器,DSL设备,MEDICAL ELECTRONICS,空调设备,DATA LINES,TEST EQUIPMENT,电视机,POWER SUPPLIES,TELECOM SLIC PROTECTION,COMMUNICATION LINES AND EQUIPMENT,有线电视设备,DSL EQUIPMENT,有线调制解调器,TV SETS,WLAN ROUTERS,DSL调制解调器,DSL MODEMS,INSTRUMENTATION CIRCUITS,电源,仪表电路,通信线路及设备
【选型】半导体放电管P0640SD助力光猫网口浪涌防护电路设计，浪涌10/700μS测试可达8KV
在光猫产品应用中，客户须选用一半导体放电管TSS用于网口浪涌防护电路设计，要求：双向、断态电压不低于55V、峰值脉冲电压8KV、SMB封装、国产厂牌优先。笔者推荐了硕凯P0640SD，浪涌10/700μS测试可达8KV，抗浪涌能力强。
【产品】峰值电压防护达10kV的国产陶瓷气体放电管，寄生电容＜1pF，符合IEC61000-4-5防护标准
硕凯电子（SOCAY）推出的陶瓷气体放电管（雷击浪涌防护器件）SC2E5-90LSMD。击穿电压为72V~108V，IPP为5KA，寄生电容在1pF以内，绝缘阻抗达1GΩ@50V，符合IEC61000-4-5的防护标准。
SC2E5系列双电极气体放电管（GDT）
该资料介绍了SC2E5系列二电极气体放电管（GDT）的特性和应用。GDT是用于保护电信设备、CATV网络、电力传输系统、客户终端设备等免受电涌损害的经典组件。资料详细描述了GDT的产品特性、电气特性、应用领域和包装信息。
硕凯电子 - 2-ELECTRODE GAS DISCHARGE TUBE,GAS DISCHARGE TUBE,气体放电管,GDT,2电极气体放电管,SC2E5,SC2E5-420LL,SC2E5-75L,SC2E5-250LL,SC2E5-800L,SC2E5-230LL,SC2E5 SERIES,SC2E5-420L,SC2E5-300LI,SC2E5-600L,SC2E5-90LL,SC2E5-800LI,SC2E5-250L,SC2E5-230L,SC2E5-150LL,SC2E5-XXXLL,SC2E5-470L,SC2E5-75LL,SC2E5-470LL,SC2E5-600LL,SC2E5-90L,SC2E5-300L,SC2E5-150L,SC2E5-350LI,SC2E5-XXXL,SC2E5-350L,COMMUNICATION EQUIPMENT,XDSL设备,试验设备,消费电子,ADSL2协议+,数据线,SATELLITE,CATV EQUIPMENT,AIR-CONDITIONING EQUIPMENT,电信SLIC保护,ADSL设备,CABLE MODEMS,WLAN路由器,BROADBAND EQUIPMENT,空调设备,DATA LINES,ADSL EQUIPMENT,TEST EQUIPMENT,卫星,电视机,POWER SUPPLIES,TELECOM SLIC PROTECTION,ADSL2+,有线电视设备,有线调制解调器,TV SETS,WLAN ROUTERS,XDSL EQUIPMENT,通信设备,DSL调制解调器,DSL MODEMS,宽带设备,电源,CONSUMER ELECTRONICS
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可定制ATA TE Cooler的冷却功率范围：35~800W；控温精度：≦±0.1℃；尺寸：冷面：20*20到500*300；热面：60*60到540*400 （长*宽；单位mm）。
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可定制ATD TE Dehumidifier的冷却功率：20~220W；工作电压：12V(DC)/ 220V(AC)；控温精度：≤±0.5℃；尺寸：冷面：20*20~500*300；热面：60*60~540*400(长*宽;单位mm）。
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