【技术】实现通信系统高可靠性的首要条件：5G宏基站能够抵御电力线浪涌和电气干扰

时间： 2023-02-10 来源：力特奥维斯Littelfuse公众号

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任何通信系统都十分重视可靠性，获得高可靠性的首要条件，就是需要5G宏基站能够抵御电力线浪涌和电气干扰，例如雷电引起的瞬变和其它瞬变和过载，以及闪电和静电放电（ESD）冲击等环境电气危害。电源线以外的三大基站系统，即电源、备用电池系统和基带单元，就是需要保护的重点。

保护电源系统

电源和备用电池系统提供交流线路电源和直流电池备用电源，以确保在禁用交流线路电源时基站保持供电。下图显示了电源和备用电池系统的电路块。

电源和备用电池系统框图

保护输入保护、整流器和滤波电路

在宏基站应用中，输入保护、整流器和滤波器将交流输入转换为直流。由于与交流线路连接，因此需要一整套过电流和过电压瞬态保护。

快速熔断器可以防止损坏电源中的功率半导体，提供电流过载和短路保护。其它电源电路可以在输入线路上加入一个MOV和气体放电管，以吸收和保护电路免受交流线路感应电压瞬变的影响。还建议在电路中使用TVS二极管，以提高对瞬态浪涌的抗扰度并提高长期可靠性。最后，在电路中添加一个磁传感器以确保电子柜门打开时断开电源。

高频转换器和钳位电路

高频转换器和钳位器将整流后的交流线电压转换为kHz频率范围内的脉冲波形。TVS二极管可用于吸收任何设法通过输入电路的瞬变并保护下游电路。可以使用具有低Rds(on)和高dv/dt的MOSFET来降低通态功耗和开关功率损耗，以提高开关电源的效率。

输出整流滤波电路

输出整流和滤波器将脉冲电压转换回直流电压。一种解决方案是使用具有超低正向电压的肖特基二极管整流器来减少电路中的损耗。肖特基二极管的正向压降低，有助于提高电源效率。

输出直流保护电路

在输出直流保护电路中使用快速熔断器可以保护电源免受负载中的任何过载故障，包括AAS和基带单元。

备用电池

在电池电路上使用快速熔断器以提供过载保护。监测电池温升对于确保电池的安全性是必要的。可以使用放置在电池组模块上的表面贴装热敏电阻。这种方法还可以帮助保护电池组模块免于过度充电。微型断路器为电池组提供过热和过流保护，并提供辅助保护组件，帮助防止电池组进入过充电状态或过放电状态，可以作为备用电池电路中电池管理IC备用的组件。

总体而言，备用电池电路中的电池管理系统 (BMS) 具有连接到每个电池组的单个电池的电压检测线。这些感应线容易受到ESD和其它电压瞬变的影响。建议使用由一个封装组成的TVS二极管阵列，其中两个TVS二极管在检测线上以阳极到阳极的方式连接，以实现双极瞬态保护。

保护基带单元

基带单元有自己的电源，处理来自呼叫和数据传输的数据，对传输进行编码或对接收到的信号进行解码，并在有线基础设施和AAS之间链接数据。

基带单元框图

基带单元的电源输入

可以使用熔断器在电源输入电路的输入端进行过电流保护。对于直流电路还可以考虑使用快速熔断器。金属氧化物压敏电阻 (MOV) 和气体放电管串联组合有助于保护电源输入电路的前端免受通过主交流电源和备用电池电路的瞬态的影响。由于电源输入为所有其它电路供电，因此可以考虑在电源输入电路的后端使用瞬态电压抑制（TVS）二极管（如下图所示）来保护这些电路免受瞬态和ESD的影响。

HDMI电路

HDMI接口数据线应该有ESD保护。下图的4线TVS二极管阵列可吸收高达20kV的ESD冲击。

用于I/O线路保护的4线TVS二极管阵列

低于50nA的低泄漏电流和低于0.5pF的电容的组件，可减少对高速HDMI传输的干扰，这是非常重要的。与基带单元中的其它电路一样，TVS二极管将提供高达30kV的单向或双向ESD保护。

设计基站以实现最长正常运行时间

设计人员可以使用范围广泛的安全组件和多个版本的组件，通过与组件制造商的应用工程师合作来指定所需的保护、控制和传感组件，从而节省开发时间。此外，应用工程师可以协助指导满足基站的国家和国际标准。一些制造商还提供预符合性测试，以帮助设计人员符合标准。

通信基础设施必须具有极高的可靠性，才能使正常运行时间超过99.9%。以上推荐的组件技术可以保护电路免受五种电气危险源的影响，帮助提供无线通信基础设施所需的高可靠性。

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本文由犀牛先生转载自力特奥维斯Littelfuse公众号，原文标题为:[技术文章] 精心设计以实现高可靠性来保护5G 宏基站，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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【技术】一文介绍气体放电管的结构及特性

为了提高气体放电管的工作稳定性，目前的气体放电管大都采用金属化陶瓷绝缘体与电极进行焊接技术，从而保证了封接的外壳与放电间隙的气密性，这就为优化选择放电管中的气体种类和压力创造了条件，气体放电管内一般充电极有氖或氢气体。本文硕凯电子将在本文中介绍气体放电管的结构及特性。

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MLA0603,TMOV34S421MP,SMOV34S131NP,V20P23AUTO,V30MLA0603,TMOV34S681M,SMOV34S251NP,V175LA20C,V230LA40A,V271HG34,V175LA20A,V20E35AUTO,V510LA40AP,TMOV34S111M,V12MLA0805L,V24RA22,V181HG34,V29MA2A,V480LTX40A,V360ZA05,V120CH8,V18ZA40PX10,V20P510P,V575LA10CP,Y9MLA0805LN,TMOV34S301MP,V18MLA0805LN,V150LA5P,RA22,V14P40P,V14P140P,V39ZA3P,V20X130P,V20E460AUTO,V20P175AUTO,V20P5AUTO,V14E40P,V625LA40A,V141DHB34,V441DHB34,TMOV34S331M,V460LA80CP,V10E30AUTO,V25S130P,V180ZA05,V321DB40,RA16,V56ZA20P,TMOV14RP750E,V3.5MLA0603NHAUTO,V481HF34,V10P150AUTO,TMOV14RP750M,V20E250P,V625LA80BP,V07E150P,V190SM7,V47ZA20P,V130LA20CX325,V20E625,V351DHB34,V05X25AUTO,V320LA40BP,TMOV34S201M,V180ZA10,V151CA32,V10P625AUTO,V14H175P,V30MLA0805LNHAUTO,V39ZA6P,V321HF34,V275LA10CP,V20E17AUTO,V481DB40,V200RA16 X2749,V8ZA1,V8ZA2,V20H320P,V20E275AUTO,V625LA80CP,V300LA40CX810,V10E14AUTO,V150LA2P,V571HF34,TMOV34S551M,V20P60P,V320LA40CP,V20E300AUTO,V14P85P,V20E60P,V20X20P,V180ZA20,V180ZA1P,V07E20AUTO,V82ZA05P,V251HB34,V20E550AUTO,V460LA10CP,V39ZA05,V10P440P,MA SERIES,V25S175P,V14H440P,V10E440P,V18MLA1206NHAUTO,V24ZTX50,VARISTOR,V575LA80CP,V100MA4B,1-2000B,V100MA4A,SMOV34S621MP,SM7,V250LA40CX620,V100MA,V26MLA1210NHAUTO,SMD,V0603MHS22F,V0603MHS22N,V230LA20CP,TMOV25SP130E,V10H40P,SMOV34S621NP,TMOV25SP130M,V14P320P,V20H25P,V230LA4,V120MLA1210N,V14MLA0805NHAUTO,V39ZA20,V39ZA1P,V551HF34,V571DB40,V0402MHS22NR,V881CA60,V330ZA05P,V430ZA05,V230LA40CP570,TMOV34S421EP,V120MA2S,V180ZA5P,V18MLN41206LWT,V20E60AUTO,V20X75AUTO,V07P7AUTO,V460SM7,V5.5MLA0603L,V480LTX80B,V5.5MLA0603N,V130LTX20B,V480LA10P,V18MA1B,V45MLA1812N,V14P85AUTO,V18MA1A,V14P42AUTO,TMOV34S151M,V230LA20AP,V20E385P,V575LA80BP,V07P320P,V20P550P,V18MA1S,V48MLA1210NHAUTO,V18ZT3P,V10H510P,V142BB60,V07X50P,V10E35P,V20X30AUTO,V20E140AUTO,V120MA1A,V150LA20C,V150LA20B,V150LA20A,TMOV34S301EP,V10E75AUTO,V14P40AUTO,V680ZA05,V661HB34,V33RA16,V05P50AUTO,175SM20,V130LA10AP,V07E460P,V200RA8,V275SM7,V20E320AUTO,V511DHB34,TMOV14RP625E,V120MA2B,V18MLA1210N,V48MLA1210LNHAUTO,TMOV14RP625M,V680LA10CP,V14X95P,V481HB34,V120MA1S,V20P14AUTO,V510SM7,V14P35AUTO,V14E440AUTO,V18MLA1206XXX,TMOV25SP175E,V18ZC3P,V07P75AUTO,V130LA10CP,TMOV25SP175M,V20P420P,V420LTX40B,V201HG34,V14E150P,V20P7AUTO,V07X95P,V271BA60,V751BA60,V100MA4S,V14P230P,V750ZA05P,V10P35P,V10P00AUTO,V251HF34,V20X60P,V300LA4,V300LA2,V240ZA05P,V82ZA4P,V301HF34,V10E25AUTO,V14E275AUTO,V14X17AUTO,V10P30P,V26MLA1206NHAUTO,V20E300P,V56MA2S,V10X25AUTO,V180ZA1,TMOV25SP440E,TMOV34S141MP,V10E30P,V180ZA5,V421DA40,V18MLN41206L,V05X30AUTO,V14X50P,TMOV25SP440M,V05E30AUTO,V282CA60,V82ZA5P,V68MLA1206,V250LA40CP620,V05X14AUTO,V18MLA0402F,V20H30P,V10E130P,TMOV34S511EP,V14E25AUTO,V750ZA05,V661BA60,SMOV34S,SM20,V56MA2B,V9MLA0402,V10H420P,V56MA2A,V07P140P,V07X17AUTO,V230LA40CX570,V20P25P,HF SERIES,V82ZA2P,V150RA8,V18AUMLA222OT,V07X40P,V47RA8,V33ZA20P,HB SERIES,V3.5MLA0805LNHAUTO,V18MLA0805NHAUTO,V661HG34,FBMOV300M,V18MLA0402N,V351HA32,V05E14AUTO,V20P250P,V25S625P,V351HA40,V20H150P,V14MLA1206N,V251DB40,V07E17AUTO,V20E25P,V141HB34,V14P250AUTO,V14E275P,V07P275P,V751HG34,V39ZA1,V82ZA12,V20H35P,V430RA22,TMOV14RP175E,TMOV20RP275M,V14E460AUTO,V391HA32,V20P385P,V10X95AUTO,V39ZA6,V39ZA3,V33ZTX5,TMOV14RP175M,TMOV20RP275E,V10H550P,V07P230P,V33ZTX1,V82ZA20,V05E60AUTO,V18MLA1206N,V511CA60,V330MA5B,V420SM7,VXXXXLAXXCP,TMOV34S621MP,V14H300P,V391HA40,V14E300AUTO,V175LA40AP,V430RA16,V48AUMLA2220,V12ZA1P,V05E75AUTO,V131HG34,V360ZA05P,V480LA7,V421DHB34,V18MLE1206XXX,V330MA2A,TMOV20RP140M,V320LA7,V8RA8,V07X35AUTO,V10E175P,TMOV34S461MP,TMOV20RP140E,V33CH8,V33MLA1206N,V14E230P,V230LA20AP1347,V0603MHS22NR,V10E95AUTO,V10H115P,V12ZA2P,V26MLA0603N,V10P75P,V14P0AUTO,V175LA20CPX425,V26MLA0603F,V82ZA05,V10P625P,V14MLA0603,V175SM20,V10X35P,V10E75P,V220ZA05,TMOV14RP130E,V14P60AUTO,V22ZA3PX1347,V07P35AUTO,V511CA32,V200RA22,TMOV14RP130M,V150LA1P,V301HB34,V10E550AUTO,V36ZA20P,V07P40P,V385SM7,V68AUMLA2220,V07E35AUTO,V20E230AUTO,V271HB34,V321HA32,V130LTX2,V625LA10,TMOV34S661EP,V05P20AUTO,V05E11P L1B5XXXXX,V9MLA0402LN,V420LA20AP,V30MLA1206N,V07E40P,V10E23AUTO,V14MLA0805LN,V10X20AUTO,TMOV34S141EP,V510LA,FBMOV385M,V14X11P,V07X75AUTO,V10H460P,V22RA16,V12ZA05,M83530/1-2200D,V10X30P,V20H460P,V07P23AUTO,V20P75AUTO,V9MLA0402LF,V05X40P,V18ZA40PX2855,V460LA40B,V460LA40C,V20P150AUTO,V625LA40AP,V25S750P,V680LA10,V420LA20CP,V27ZA4,V27ZA2,V07P85P,V14E230AUTO,V275LA10P,V39ZA05P,V141HF34,V27ZA1,V14H40P,TMOV20RP230M,V321HA40,V421HA32,V14E320P,V131BA60,V200RA16,TMOV20RP230E,V20P23P,V18MA,V9MLN41206,V10E50AUTO,V14X42AUTO,V

选型指南 - LITTELFUSE - Revised: 09/14/17 PDF 中文下载

391 Series SP Fast-Acting Fuse n. genormt

型号- 391 SERIES,391

技术文档 - LITTELFUSE - 06.04.04 PDF 英文下载

【选型】Littelfuse（力特）高速半导体保险丝选型指南（中文）

目录- POWR-SPEED®高速半导体熔断器简介 POWR-SPEED高速方形熔断器 POWR-SPEED高速圆形熔断器 POWR-SPEED熔断器配件通信电源专用熔断器 POWR-SPEED熔断器相互参照指南

型号- PSR033DL1000X,KLC150,PSR072DL0400X,L50QS225,PSR070DL0250Z,L25S300.V,PSR031DL0315Z,PSR031DL0400Z,PSR031FL0450,PSR030DS0450,L50S015.T,PSR071FS0200,PSR073FL0350Z,PSR072DL0315X,PSR030DL0100,L70S030.T,PSR033DL0900X,L50QS050.T,L15S003.T,L25S006.T,PPSR031DL0800,L70S150.V,L75QS100.V,PSR031FS0450Z,PSR031UL0250,PSR033US0630,0TLS080.TXLS,PSR030DS0500Z,PSR033FL0500,PSR033DS1250,PSR072UL0630X,PSR033DS0900X,0KLC080.V,PSR032DS1100X,PSR072DL0550,PSR032UL0900,PSX1XLFL0550,L50S100.T,L50S150,PSX3XLFL0900X,L75QS250,L50QS300.V,PSR032DS0550,PSR031FS0350,L50QS250,PSR031UL0630Z,PSR071FL0350,L25S100,L75QS090.V,PSX3XLDB1400X,0KLC005.T,PSR073FS0350Z,PSR030UL0160Z,PSR031US0630Z,L15S012.T,PSX 系列,PSR031DL0800,PSR030FS0200Z,PSR033FL0550,PSR071UL0160Z,PSR031FL0450Z,PSR073UL0350X,PSR031US0550,L70S600.X,PSR033FL1400,PSR072UL0500X,PSR071FS0200Z,PSX1XLFL0125,L70QS035.V,PSR031FL0400,PSR073UL0630,A70P,PSR030DS0400,PSR033FL1800Z,MSXL 系列,PSR073FS0315,L50QS275,PSR030FS0550Z,L50S100,PSR031UL0500Z,PSR070FS0080Z,L60S005.T,PSR072FL0450Z,L15S300,PSR033US1800X,PSX1XLUB0280X,KLC175,L70QS700,0KLC125.X,PSR033FS0800,PSR030DL0125,PSX1XLFL0350X,TLS006,PSR032FS1000,L50S090.T,PSR032DS0500,PSR072FS0450Z,L15S025.T,PSR031US0500Z,PSR072DL0500,PSX1XLDB0350,PSX1XLFL0100,L70S,PSR033US1500,PSR033FS1800Z,PSX3XLUB0900,L50S125,PSR070FL0080Z,PSR032DL1100X,PSR031US0500,L70S350.V,PSR033UL0700,PSR030DL0500,PSR072FL0500Z,L25S100.V,L25S175,PSR030FL0200Z,PSX1XLUB0200,PSX1XLDB0315X,PSR032FL0700,PSX1XLDB0400X,L25S090.V,PSR033DL0900,PSR070DL0080,PSR033FL0900,L25S002.T,PSR031UL0450Z,L75QS300.X,PSR030FS0063,PSR073DL0350,PSR031DS0700,0KLC040.T,L75QS200,PSR072FS0630Z,PSR070DL0050,PSR031US0450Z,PSR030UL0400,PSR032FS0700Z,L25S015.T,L50S550,PSR033US1100X,PSR073FL0450,L50QS500.X,L50S050.T,PSR070DL0063,PSR071FL0160Z,PSR030FS0080,PSR070DL0160Z,L50S300.V,PSX1XLDB0315,L70QS350,PSR032UL0500,PSR072UL0280X,PSR071UL0250Z,PSR071DL0280,PSR033FS1400Z,PSR031UL0630,PSR030FL0550Z,PSR031DS0350Z,PSR071UL0160,PSX1XLUB0630,PSR031DL0400,PSR073FS0700,FWA,PSR033DS0630X,FWH,PSX3XLFL1000X,PSR033FL1800,PSR033UL1100X,PSR031UL0200,FWP,PSR071DL0250,FWX,PSR031FL0800,PSR033DS0800,PSR032US0800,KAA,KAC,PSR033UL1600,L25S125,KAB,PSR033DL0500X,PSR072FL0630,PSX3XLDB0900X,PSR031DL0350Z,PSR030DL0550,L50S500,PSR030DS0100Z,PSR033DL1800,PSR073DL0315,PSX3XLDB1100,L70S800.X,0TLS006.T,L50QS200,PSR071FL0315,L50QS250.V,PSR032DL0630,PSR071DL0280Z,KBH,PSR032DS0900,L25S150,0TLS030.SLSA,SF70P,L70S600,L70QS300,PSR030DS0450Z,PSR032UL0550,PSX1XLFL0500,XL70F,PSR031FS0800Z,PSR030UL0450,PSR070UL0280,TLS100MB,L15S350.T,PSX3XLDB1000X,PSR072FL0630Z,PSR033DS0500X,L75QS225,L70QS070.V,PSR073FL0400,90-447,PSR032FL0700Z,L15S800.V,L60S040.T,PSR071DL0200,L25S010.T,90-445,PSR033DL0630X,PSR031US0800Z,PSR030DL0100Z,PSR030FL0125,L60S300,L60S700.X,PSR031DS0315,PSR072UL0450,PSR032UL0450,PSX1XLUB0160,PSR070FS0125Z,PSR031DL0450,TLS 100A-MB,PSR032FS0400Z,L60S045.T,07945825195,0KLC250.X,L50QS700.X,07945825194,07945825197,07945825196,PSR030DL0550Z,PSR032UL0700X,07945825191,07945825190,L75QS600,07945825193,07945825192,PSR070UL0315Z,PSR033US1400X,07945825199,KLC600,07945825198,L70S250,PSR030FL0100,PSR032FS0630,TLS030LSA,PSR070FL0125Z,PSR030FS0250Z,PSR070UL0250,PSX3XLFL1250,PSR030FL0250Z,PSX1XLUB0100X,L70S200.V,PSR073DL0400,L25S045.T,PSR033DS0700,0TLSXXXT–,L50S020.T,PSR072FS0500,PSX1XLUB0450X,PSR073DL0700X,L50S600,PSR033UL1400X,PSR070FS0315,OL-L70QS000,L50QS700,PSR031FS0500Z,PSR030UL0063,07945825162,07945825161,PSR070FL0050,07945825164,PSR032US0700X,07945825163,07945825160,0KLC700.X,L70S225,PSR031FS0800,PSR033US0550X,07945825169,07945825166,07945825165,07945825168,L60S450.X,07945825167,L25S250.V,L50S175.V,PSX1XLUB0125,0TLS125.TXLR,PSR071FS0280Z,L60S350,PSR070DL0080Z,07945825151,PSR031DS0700Z,07945825150,07945825153,07945825152,PSR070FL0063,07945825159,PSR072UL0400,07945825158,PSR030US0315,07945825155,07945825154,07945825157,07945825156,PSR030FS0050,PSR030US0350,PSR033DS1600,PSR030US0200Z,PSR072FL0250,PSR030UL0040,PSR033UL0550X,L25S700.V,PSR030UL0550Z,L75QS500.X,07945825184,PSR072FS0550,L60S010.T,L70S035.T,07945825183,07945825186,07945825185,07945825180,07945825182,07945825181,L70S200,07945825188,07945825187,PSR031UL0700,PSR032FL0400Z,07945825189,PSR030FL0550,PSR030FS0040,PSR030US0550Z,TLS 50A-LB,PSR033DL0450,PSR030FS0160Z,PSR030UL0200Z,PSR030UL0050,PSR031DL0700Z,L75QS050.V,07945825173,L50QS450.X,07945825172,PSR070UL0200,07945825175,07945825174,07945825171,07945825170,07945825177,PSX3XLUB1100X,07945825176,07945825179,07945825178,L60S700,KLC,PSR033UL1800X,PSR070DL0125Z,L50QS125.V,PSR071FL0200Z,PSR 030 US 0550 Z,PSR032DL1100,L50QS080.T,PSR071FS0160,0KLC450.X,PSR030DL0063,PSR032FS1100,PSR030US0063Z,TLS050LB,PSR030DL0080,L15S007.T,PSR072FL0280,LSCR1XX,PSX1XLFL0160,L25S600,PSR030FL0160Z,PSR073FS0350,PSX3XLUB0800,KLC200,L15S060.T,PSX1XLUB0630X,MSXL,PSR072DL0450X,PSR030DS0050Z,PSX1XLFL0400X,PSX1XLFL0315X,PSR030UL0080,07945825142,07945825141,L60S125.X,PSR030DL0040,07945825148,07945825147,PSR072UL0550X,07945825149,PSR033DS0450X,07945825144,07945825143,07945825146,07945825145,P

选型指南 - LITTELFUSE - 修订版：5-B-092320 - 2020 PDF 中文下载

Littelfuse（力特）气体放电管（GDT）选型指南

目录- GDT Characteristics, Terms and Consideration Factors Introduction Gas Discharge Tubes

型号- SL1021A145,SL1010A170,SL0902A,CG5250,SH90,SL1021A260,SL1021B350,SH400,SL1021B230,SG75,SGXXX,SL0902A600,SL1003A090,CG3 1.5,CG3 1.3,CG3 1.2,SL1002A600,CG3 1.1,CG3 1.0,SL1002A600SP,CG7200,CG6350,SE SERIES,SL1021A150,CG6230,SG420,CG6470,SG300,CG2420,SG300Q,CG2300,SG SERIES,CG5350L-03TR,SL1003A400,SL1122A,SL1122A260,CG5XXXLS,SL1021A600,CG5230,CG5470,SL1021B250,CG5350,SL1002A075,SG90,SH300,CG7400,SL1011A075,CG SERIES,SL1002A,CG75,CG5XXXMS,SL1026-700,CG3 2.0,CG90,SE140,CG5XXXL-02,SG200,CG3 2.7,SL1011A090,CG3 2.5,SL1021B145,CG2145 SN,SL1003A300,SL1003A,CG4 SERIES,CG5600L-02,SL1026-275,CG2250 SN,CG5XXXLTR,CG90 SN,CG7230,SL1002A090,CG7350,CG7470,SE200,CG5600,SL1003A450,SL1411A250,CG3 7.5,CG7120,CG2470,SL1021A350,SL1021A230,CG43.0,CG6145,SL0902AXXXSM,SL1011A500,SL1010A230,SL1010A350,CG7 SERIES,SL1010A470,SE470,CG5270,SE230,SL1021B450,CG5150,SE350,SG420Q,SL1011A150,SG400,SL1003A350,SL1003A230,CG5145,SL1411A470,SL1411A350,SL1411A230,CG2600 SN,SL1021A250,CG6250,SH600,CG2 SERIES,CG590,CG110,CG2800LTR,SL1011A600,SL1021A420,SL1021A300,SL1003AXXXR,CG5XXXL-03TR,SG150,SG600Q,SL1021B075,CG5XXXXLTR,CG7150,CG5400,SG450Q,SL1011A250,SL1003A250,CG3 5.0,SL1021B400,CG2350 SN,AC SERIES,SH230,CG2230L,SH350,SH470,CG2145,CG41.2,SL1011A260,CG2470 SN,SL1003AXXXRF,SL1021B090,CG41.0,CG690,SL1011A145,SL1003AXXXR-001,CG41.8,SL1021A200,SL1002A230,SL1411A,CG5 SERIES,SL1002A470,SL1002A350,CG7250,SH145,CG2230 SN,CG2350,CG2230,SL1011A230,SL0902A420,SL1011A350,SL1011A470,SL1411A600,SL1021B300,CG675,SL1122A090,SL0902A090,CG2250,CG3 6.5,SH250,SL1411A150,SL1021A450,CG3 6.2,SL1021B420,SH SERIES,CG42.0,CG6600,CG790,CG42.5,SL1003A260,AC120,CG2800,CG42.7,AC240,SL1021A500,SG350,SG230,SL1021B150,SL1002A250,SL1026,SL1122A230,CG3 3.3,CG775,CG3 3.0,SL1026-400,SL1010A420,SL1411A090,SL0902A230,SL0902A350,SL1021A,CG3 SERIES,SL1021B,CG6300,SL1010A075,SL1021A400,CG6 SERIES,CG5XXX,SE500,SL1010A,SH75,SL1021A090,CG3 4.0,SL1021B500,CG2300 SN,SL1411A075,SL1002A260,CG21000,CG3 4.5,SG500Q,CG6400,SG350Q,SL1003A500,SL1011A,SL1010A090,CG2600,CG40.8

选型指南 - LITTELFUSE - Revised: 12/12/17 - 12/12/17 PDF 英文下载

437 Series 1206 Fast-Acting Fuse Surface Mount Fuses Datasheet

型号- 437 SERIES,437,0437008.WR

数据手册 - LITTELFUSE - 05/30/24 PDF 英文下载

446/447 Series EBF Fuse Fast-Acting

型号- 447 SERIES,0447002.YXP,446,447,0446002.ZRP,446 SERIES

数据手册 - LITTELFUSE - 06/11/21 PDF 英文下载查看更多版本

如何在瞬态电压抑制二极管（TVS）SMBJ15CA的单向抑制和双向抑制之间进行选择？

单向二极管通常用于直流电路，包括按钮和开关。它们也被设计用于没有负电压作为信号一部分的数字电路中（如USB、HDMI等）。双向二极管被用于交流电路中，其可能含有具有大于-0.7V负分量的任何信号，这些电路包括音频、模拟视频、遗留数据端口（如CAN、LIN、RS-485等）和RF接口（如蜂窝、蓝牙、NFC等）等。

技术问答发布时间 : 2017-10-10

【元件】UN3E3-XXXLSMD系列全方型外观结构的陶瓷气体放电管，更好用于通信、电力系统、医疗设备与工业等领域

优恩半导体UN3E3-XXXLSMD系列陶瓷气体放电管在设计采用了全方型的外观结构，这种设计不仅使得放电管在外观上更加美观大方，它在实际应用中也带来了诸多优势，如更便捷的安装与布局、更优化的电气性能、更高的稳定性，使其可以更好的应用于通信、电力系统、医疗设备与工业等领域。

产品发布时间 : 2024-05-16

台舟电子TVS瞬态电压抑制二极管选型表

台舟电子TVS瞬态电压抑制二极管，广泛应用于电源保护、通信设备、汽车电子等领域。可用于消费电子产品、汽车工业、军火、电信、航空航天工业和智能控制系统等广泛应用。

产品型号	品类	Marking Code（Uni）	Reverse Stand off Voltage Vʀ(V)	Breakdown Voltage Vʙʀ @ Iᴛ(V) Min	Breakdown Voltage Vʙʀ @ Iᴛ(V) Max	Test Current Iᴛ (mA)	Maximum Clamping Voltage Vc@ Ipp(V)	Maximum Peak Pulse Current Ipp(A)	Maximun Reverse Leakage Iʀ@Vʀ(μA)
SMF3.3A	Transient Voltage Suppressors	3.3A	3.3V	5.2V	6.0V	10A	8V	25A	400μA

选型表 - 台舟电子立即选型

【产品】工业用高能金属氧化物压敏电阻，截短引线设计便于通孔电路板布局

Littelfuse公司推出的HC系列瞬态浪涌抑制器是工业用高能金属氧化物压敏电阻（MOV）。设计用于为室外和建筑物的维修入口环境（配电板）、油井钻探、采矿和运输等工业领域使用的电机控制和电源设备提供次级浪涌保护。

新产品发布时间 : 2018-05-16

SMCJ Transient Voltage Suppressor Diode Series

型号- SMCJ36CA,SMCJ78CA,SMCJ210CA,SMCJ28A,SMCJ16A,SMCJ160A,SMCJ440CA,SMCJ120A,SMCJ 7.5A,SMCJ120CA,SMCJ350CA,SMCJ20CA,SMCJ43A,SMCJ43CA,SMCJ85CA,SMCJ24CA,SMCJ8.5 A,SMCJ45A,SMCJ28CA,SMCJ17A,SMCJ300CA,SMCJ300A,SMCJ18CA,SMCJ170CA,SMCJ60A,SMCJ SERIES,SMCJ14CA,SMCJ20A,SMCJ54CA,SMCJ26A,SMCJ14A,SMCJ78A,SMCJ190A,SMCJ6.0A,SMCJ 8.0A,SMCJ150A,SMCJ110A,SMCJ200A,SMCJ100CA,SMCJ180CA,SMCJ40CA,SMCJ15A,SMCJXXXCA,SMCJ48CA,SMCJ,SMCJ150CA,SMCJ350A,SMCJ 6.5CA,SMCJ17CA,SMCJ51CA,SMCJ70CA,SMCJ70A,SMCJ7.0 CA,SMCJ54A,SMCJ13CA,SMCJ30A,SMCJ11CA,SMCJ48A,SMCJ36A,SMCJ24A,SMCJ12A,SMCJ250CA,SMCJ180A,SMCJ100A,SMCJ400A,SMCJ210A,SMCJ440A,SMCJ400CA,SMCJ250A,SMCJ160CA,SMCJ51A,SMCJ60CA,SMCJ11A,SMCJ75A,SMCJ 8.0CA,SMCJ22CA,SMCJ64CA,SMCJ45CA,SMCJ13A,SMCJ26CA,SMCJ200CA,SMCJ9.0 CA,SMCJ 6.5A,SMCJ8.5 CA,SMCJ6.0CA,SMCJ90CA,SMCJ130CA,SMCJ40A,SMCJ16CA,SMCJ64A,SMCJ12CA,SMCJ33CA,SMCJ75CA,SMCJ10CA,SMCJ58A,SMCJ58CA,SMCJ18A,SMCJ5.0CA,SMCJ170A,SMCJ130A,SMCJ9.0 A,SMCJ220A,SMCJ33A,SMCJ85A,SMCJ***A,SMCJ 7.5CA,SMCJ220CA,SMCJ5.0A,SMCJ110CA,SMCJ***CA,SMCJ90A,SMCJ7.0 A,SMCJ190CA,SMCJ15CA,SMCJ30CA,SMCJ22A,SMCJ10A

数据手册 - 音特电子 - Rev:19.3 - 2019/6/11 PDF 英文下载

【产品】SOT-23封装的瞬态抑制二极管MMBZ系列，峰值功率40W，适用于通信系统、医疗设备等领域

MMBZ系列是萨科微（SLKOR）推出的瞬态抑制二极管。该双单片硅齐纳二极管专门为需要瞬态过电压保护能力的应用而设计。它们适用于电压和ESD敏感设备，如计算机，打印机，商用机器，通信系统，医疗设备和其他应用。

产品发布时间 : 2023-06-27

【选型】如何选用合适的气体放电管进行开关电源雷击浪涌的保护

笔者在开关电源设计项目中，做电源输入的保护时，涉及到雷击浪涌保护器件气体放电管的选型设计。由于Littelfuse的气体放电管型号很多，因此如何选择一款合适自己项目使用的气体放电管也是困扰设计工程师的一大难题。笔者此前负责的多个项目中，为了实现开关电源的输入雷击浪涌保护，多采用Littelfuse的气体放电管，积累了一定的选型和应用经验，借此分享给大家，希望对在一般选型应用中提供一些帮助。

器件选型发布时间 : 2018-07-01