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KSMAJ5.0A-E3/61是一款单向瞬态抑制二极管(TVS),专为电子电路的瞬态过压防护设计,核心作用是快速响应并钳位瞬态脉冲电压,避免敏感半导体器件(如MCU、传感器、通信芯片等)因过压击穿损坏。该器件集成了高脉冲承受能力与低漏电流特性,适配多领域高密度PCB设计需求,是消费电子、工业控制等场景的主流防护器件之一。
本器件的电气参数围绕“过压防护的有效性与稳定性”优化,核心参数及工程意义如下:
Vrwm是器件正常工作时(无瞬态脉冲)可承受的最大反向直流电压,即后级电路的典型工作电压上限(如5V供电系统)。此参数下器件反向漏电流极低,不影响电路正常功耗,可直接并联在5V供电或信号端口。
钳位电压是器件在承受额定峰值脉冲电流(Ipp) 时的最大电压输出,是过压防护的核心指标——它直接决定后级敏感器件的安全阈值(需满足Vc < 后级IC耐压)。该器件9.2V的钳位电压,可有效保护5V耐压的主流芯片(如MCU、运放等),避免过压击穿。
Ipp是器件在单次8/20μs标准脉冲波形下可承受的最大电流,代表其抗强瞬态冲击能力。该参数可覆盖大多数应用场景的脉冲强度(如ESD脉冲约为20-50A,本器件裕量充足)。
Ppp=Vc×Ipp(近似),是器件单次脉冲的最大功率容量,直接反映防护裕量。400W的功率容量为电路提供了充足冗余,避免因脉冲功率超出器件极限导致防护失效。
击穿电压是器件反向击穿的起始电压,介于Vrwm(5V)与Vc(9.2V)之间。当瞬态电压超过Vbr时,器件快速导通(响应时间<1ns),将电压钳位至Vc,实现“快速响应+精准钳位”。
Ir是Vrwm(5V)下的反向漏电流,该值越低,器件对电路正常工作的功耗影响越小。800μA的漏电流满足大多数低功耗应用(如便携式设备)的需求,不会导致电池续航下降。
采用表面贴装SMA封装,尺寸紧凑(典型尺寸:φ2.7×4.0mm),适配自动贴装生产线(SMT),可显著节省PCB空间,适合高密度设计(如智能手机、智能穿戴设备)。封装引脚间距合理,焊接可靠性高,无虚焊风险。
由KUU品牌生产,该品牌专注于防护器件研发,器件采用高可靠性芯片工艺,封装密封性好,可有效抵御环境湿度、粉尘等影响,长期工作稳定性优异。
该器件支持工业级宽温范围,可在极端温度环境下稳定工作(如北方户外设备、高温工业车间),无需额外温度补偿电路,降低系统设计复杂度。
TVS器件具备多次脉冲耐受能力(典型重复次数>1000次),可应对频繁出现的瞬态脉冲(如设备插拔产生的ESD、电磁干扰产生的EFT),无需频繁更换器件,降低维护成本。
KSMAJ5.0A-E3/61的参数适配多领域防护需求,核心应用场景包括:
虽未明确标注汽车级认证,但宽温特性可适配部分车载电子设备(如车载显示屏的按键接口防护、车载充电器的输出端口防护)。
本器件凭借高性价比、紧凑封装与宽温特性,成为5V系统瞬态防护的主流选择,可有效提升电路的抗干扰能力与可靠性。
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