WMSIC Electronic Components

Brightking SMAJ43A

ModelSMAJ43A
PackageSMA
BrandBrightking
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Brightking SMAJ43A
Type
BRIGHTKING
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Brightking
Electronic Component
SMAJ43A
Electronic Component
1
Package
SMA
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.126g
Electronic Component
1
Electronic Component
BM0265797468
Operating Temperature
55℃~+150℃
Voltage
69.4V
Electronic Component
IEC 61000-4-2
Current(Ir)
1uA
Voltage(VBR)
52.8V

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

Brightking SMAJ43A TVS二极管产品概述

一、核心基础参数梳理

SMAJ43A作为单向瞬态抑制二极管(TVS),核心参数精准适配中低压过压防护场景:

  • 反向截止电压(Vrwm):43V,即电路正常工作时二极管反向不导通的最大电压,确保不干扰常规信号/电源传输;
  • 击穿电压(Vbr):52.8V,是二极管从截止态快速切换至导通态的典型电压(约比Vrwm高23%,符合TVS常规设计逻辑);
  • 峰值脉冲电流(Ipp):5.8A(对应10/1000μs标准脉冲波形),可承受单次强浪涌冲击,保护后级敏感元件;
  • 钳位电压(Vc):69.4V,是脉冲峰值时的电压限制值,将过压钳位在安全区间内;
  • 反向漏电流(Ir):仅1μA(Vrwm下测试),低功耗特性不影响电路正常运行;
  • 工作温度:-55℃~+150℃,覆盖工业级宽温环境;
  • 防护等级:符合IEC 61000-4-2标准,具备静电放电(ESD)防护能力。

二、产品核心特性

  1. 快速响应防护:TVS固有纳秒级响应速度,SMAJ43A可在过压发生瞬间导通,避免后级元件因电压尖峰损坏;
  2. 低功耗设计:反向漏电流仅1μA,正常工作时几乎无额外功耗,适配低功耗电路(如便携式设备);
  3. 宽温可靠性:-55℃至+150℃的温度范围,可稳定运行于户外、高温工业等极端场景;
  4. 紧凑封装适配:采用DO-214AC(SMA)贴片封装,体积小巧(典型尺寸2.5mm×1.5mm×1.0mm),适合高密度PCB布局,支持自动化贴装;
  5. 明确防护区间:从43V截止→52.8V击穿→69.4V钳位,电压区间清晰,防护针对性强,无需额外复杂电路。

三、典型应用场景

SMAJ43A的参数特性使其适用于多领域的过压/静电防护:

  1. 消费电子:手机、平板、笔记本的充电/数据接口(如USB),防护静电放电及电源浪涌;
  2. 工业控制:PLC输入输出端口、传感器模块、工业电源线路,应对工业环境中的浪涌干扰;
  3. 通信设备:路由器、交换机、基站的信号/电源端口,防护雷击感应浪涌及ESD;
  4. 汽车电子(部分场景):车载辅助系统(如摄像头、传感器)的电路防护,适配-40℃~+125℃汽车常规温度,150℃上限可覆盖极端高温;
  5. 医疗设备:小型医疗仪器的接口防护,确保设备稳定且不影响低功耗要求。

四、封装与品牌优势

  1. 封装细节:DO-214AC(SMA)为表面贴装型,引脚间距合理,贴装可靠性高;封装材料耐高温、耐潮湿,符合RoHS环保标准;
  2. 品牌背景:Brightking(台湾君耀)是全球知名过压防护器件制造商,专注TVS、压敏电阻等产品研发,产品以高可靠性、一致性著称,SMAJ43A延续品牌质量标准,广泛应用于工业、汽车、通信领域。

五、电气性能注意事项

使用时需关注关键性能匹配:

  • 电路正常工作电压需低于43V(Vrwm),避免二极管反向导通干扰信号;
  • 5.8A峰值脉冲电流为单次能力,重复脉冲需参考平均功率降额使用;
  • 后级元件最大耐受电压需高于69.4V(钳位电压),确保防护有效;
  • 反向漏电流1μA在宽温范围内变化小,无需额外补偿电路。

SMAJ43A凭借紧凑封装、宽温可靠性及精准防护参数,成为中低压电路过压/静电防护的高性价比选择。

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