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SMAJ6.0CA是静芯微(ElecSuper)推出的双向瞬态抑制二极管(TVS),核心作用是快速抑制电路中的瞬态过压(如静电放电ESD、电快速瞬变EFT等),保护敏感电子元器件免受损坏。其小体积SMA封装与宽温特性,使其成为消费电子、工业控制等领域接口防护的高性价比选择,尤其适合工作电压≤6V的电路系统。
采用双向导通设计,无需区分正负极,安装更便捷;反向截止电压(Vrwm)=6V,即电路正常工作电压≤6V时,TVS处于截止状态,不影响电路静态功耗与信号传输。
击穿电压(Vbr)典型值为6.67V,当电路电压超过此阈值时,TVS快速击穿并导通;峰值脉冲下钳位电压(Vc)=10.3V,可将过压稳定在安全范围(如保护5V芯片时,10.3V远低于芯片最大耐压值,避免后端器件损坏)。
峰值脉冲电流(Ipp)=38.8A,峰值脉冲功率(Ppp)=400W,可承受IEC 61000-4-2标准下的高强度静电放电(如8kV接触放电、15kV空气放电),以及电机启停、雷击感应等瞬态干扰,防护能力满足多数工业与消费场景需求。
正常工作时反向漏电流(Ir)=400uA(典型值),漏电流小,不会增加电路静态功耗,适合低功耗设备(如蓝牙耳机、智能手环)应用。
采用DO-214AC(SMA)贴片封装,尺寸小巧(约2.54mm×1.55mm×1.1mm),兼容标准贴片生产线,可直接贴装于PCB板,节省空间,适合高密度布局的设备(如智能手机主板)。
工作温度覆盖**-65℃至+150℃**,满足工业级、车载级(若符合相关认证)等恶劣环境需求,可在高低温交替、湿度变化大的场景下稳定工作(如户外传感器、车载电子模块)。
防护等级符合IEC 61000-4-2静电放电标准,确保产品在静电防护场景下的可靠性,可通过第三方静电测试验证。
手机、平板、蓝牙耳机等设备的USB Type-C、充电接口,以及音频接口的静电与过压防护,避免用户插拔时的静电损坏(如充电时误触静电导致主板故障)。
PLC(可编程逻辑控制器)、传感器模块的信号输入输出端,防止现场电磁干扰(如电机启停产生的瞬态脉冲)损坏敏感电路(如ADC采样芯片)。
路由器、交换机的以太网接口、光纤收发器的信号端,抑制通信线路中的瞬态过压,保障数据传输稳定(如避免雷电感应损坏网络芯片)。
车载USB接口、胎压监测传感器、倒车雷达等模块的瞬态防护(宽温特性支持车载环境,需结合车载认证使用)。
采用回流焊时,需遵循SMA封装的焊接温度曲线(如峰值温度≤260℃,焊接时间≤30秒),避免过热损坏器件;手工焊接建议使用恒温烙铁(≤350℃,焊接时间≤5秒)。
若工作环境温度接近150℃,或脉冲频率较高(如>10Hz),建议将Vrwm降额至5.5V以下,确保长期可靠性。
如需更高防护电流(如超过40A),可采用2个SMAJ6.0CA并联(注意封装对齐,避免电流不均),提升总防护能力。
应尽可能靠近被保护器件的接口端,缩短TVS与被保护电路的距离(≤5mm),减少寄生电感影响,提升防护效率。
SMAJ6.0CA凭借双向防护、小体积、宽温特性,成为低电压电路瞬态防护的可靠选择,可覆盖多数消费电子与工业场景的防护需求。
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