【应用】TVS SR05-4B用于SIM卡防护，可通过5A浪涌电流有效进行保护
SIM卡是(Subscriber Identity Module 客户识别模块)的缩写，SIM由CPU、ROM、RAM、EEPROM和I/O电路组成。简单来说，如果设备上支持SIM卡功能，那么就可以进行网络上的通信，对于物联网来说是非常方便的。由于SIM接口是对外的，人可以触碰到，所以这个接口要做防静电的处理。
由于SIM卡容易被接触，尤其是集成度很高的板子上，一定要加防护器件，否则，很容易耦合进去静电，造成芯片引脚损坏，导致整个板子工作状态不正常。
电路防护图：
图1、电路防护图
由上图我们可以看出，只需要一个TVS器件SR05-4B就可以很好的保护SIM卡，足够达到接触8KV，空气15KV防护等级。而且在Layout中，减少PCB板的使用面积，使得布局布线更加合理化。
器件电气参数：
硕凯电子的SR05-4B的结电容非常小，在0.5pF到1pF之间，所以不会影响通信，而且SR05-4B的最大通流量是可以通过5A的浪涌电流，远高于普通的ESD（静电防护器件），对静电有更好的泄放通路。
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本文由Destiny转载自硕凯电子，原文标题为:基于SR05-4B的SIM卡防护应用，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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新产品 发布时间 : 2020-12-23
SMCJ Series Surface Mount Transient Voltage Suppressors(TVS)
型号- SMCJ36CA,SMCJ78CA,SMCJ28A,SMCJ16A,SMCJ160A,SMCJ440CA,SMCJ120A,SMCJ120CA,SMCJ350CA,SMCJ9.0CA,SMCJ43A,SMCJ20CA,SMCJ43CA,SMCJ85CA,SMCJ8.5A,SMCJ24CA,SMCJ45A,SMCJ28CA,SMCJ17A,SMCJ300CA,SMCJ7.0A,SMCJ300A,SMCJ7.0CA,SMCJ18CA,SMCJ170CA,SMCJ60A,SMCJ SERIES,SMCJ14CA,SMCJ20A,SMCJ54CA,SMCJ26A,SMCJ14A,SMCJ78A,SMCJ190A,SMCJ7.5A,SMCJ6.0A,SMCJ150A,SMCJ110A,SMCJ200A,SMCJ100CA,SMCJ180CA,SMCJ40CA,SMCJ15A,SMCJ8.5CA,SMCJ48CA,SMCJ9.0A,SMCJ,SMCJXXXCA,SMCJ150CA,SMCJ350A,SMCJ17CA,SMCJ51CA,SMCJ70CA,SMCJ6.5CA,SMCJ70A,SMCJ54A,SMCJ13CA,SMCJ30A,SMCJ11CA,SMCJ48A,SMCJ36A,SMCJ24A,SMCJ12A,SMCJ180A,SMCJ250CA,SMCJ19CA,SMCJ140A,SMCJ8.0A,SMCJ100A,SMCJ400A,SMCJ440A,SMCJ400CA,SMCJ250A,SMCJ160CA,SMCJ51A,SMCJ60CA,SMCJ11A,SMCJ75A,SMCJ22CA,SMCJ64CA,SMCJ45CA,SMCJ13A,SMCJ26CA,SMCJ200CA,SMCJ8.0CA,SMCJ6.0CA,SMCJ80A,SMCJ90CA,SMCJ130CA,SMCJ40A,SMCJ16CA,SMCJ64A,SMCJ12CA,SMCJ33CA,SMCJ75CA,SMCJ10CA,SMCJ58A,SMCJ58CA,SMCJXXXXX,SMCJ18A,SMCJ5.0CA,SMCJ170A,SMCJ130A,SMCJ220A,SMCJ80CA,SMCJ140CA,SMCJ33A,SMCJ85A,SMCJ19A,SMCJ6.5A,SMCJ220CA,SMCJ5.0A,SMCJ110CA,SMCJ7.5CA,SMCJ90A,SMCJ190CA,SMCJ22A,SMCJ15CA,SMCJ30CA,SMCJ10A
【应用】硕凯电子双向TVS SMAJ12CA助力小基站天线防雷设计，可承受400W峰值脉冲功率
某种有源天线的防雷击设计，其中需要用到一款TVS（瞬态电压抑制）二极管。本文根据客户需求推荐硕凯电子推出的双向TVS SMAJ12CA，最大钳位电压为19.9V，耐受的瞬间峰值功率可达400W，耐受的反向浪涌电流达到了20.1A。
应用方案 发布时间 : 2023-05-24
【应用】基于国产SOT-143封装TVS的USB2.0防护方案
USB2.0的芯片集成度高，易受静电损坏。基于硕凯电子的TVS设计的USB2.0防护方案，在USB2.0的电源线、数据线用1颗TVS对地做防护，钳位静电电压。所用TVS的结电容小于1.2pF，在USB2.0最高速率480Mbps时都可以完整传输信号。
应用方案 发布时间 : 2019-03-22
电子商城
品牌：硕凯电子
品类：ESD Protection Transient Voltage Suppressors Array
价格：￥0.2240
现货： 120
品牌：硕凯电子
品类：ESD Protection Bi-directional TVS Diode
价格：￥0.2250
现货： 525,000
品牌：硕凯电子
品类：Axial Lead Transient Voltage Suppressors(TVS)
价格：￥0.3920
现货： 62,595
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥0.2580
现货： 45,050
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥0.2300
现货： 35,060
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥0.3000
现货： 30,000
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥0.3040
现货： 26,890
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥0.2180
现货： 24,885
品牌：硕凯电子
品类：Surface Mount Transient Voltage Suppressors (TVS)
价格：￥1.8880
现货： 11,000
现货市场
服务
测试1.2/50us-8/20us组合波，10/700us-5/320us组合波，8/20us单波。能够模拟雷电瞬变引起的浪涌冲击抗干扰测试，最高电压达20KV，电流达20KA。点击预约，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/上海 提交需求>
测试等级：空气放电30KV±5%；接触放电30KV±5%，适用标准：GB/T 17626.2、IEC61000-4-2、ISO10605、GB/T 19951；给用户产品出电路保护设计方案建议及整改。点击预约，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/上海 提交需求>
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