WMSIC Electronic Components

BORN SMAJ43CA

ModelSMAJ43CA
PackageDO-214AC
BrandBORN
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
BORN SMAJ43CA
Type
DO-214AC
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
BORN
Electronic Component
SMAJ43CA
Electronic Component
1
Package
DO-214AC
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.116g
Electronic Component
1
Electronic Component
BM0264900516
Voltage
69.4V
Current(Ir)
1uA
Voltage(VBR)
52.8V
Electronic Component
Electronic Component
Electronic Component
5000

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

SMAJ43CA 瞬态抑制二极管(TVS)产品概述

SMAJ43CA是伯恩半导体(BORN) 推出的双向瞬态抑制二极管(TVS),采用DO-214AC(SMA)表面贴装封装,专为低至中等电压域的过压防护场景设计。该器件可快速响应瞬态过压(如静电放电、雷击感应、电路开关尖峰),将电压钳位至安全范围,有效保护敏感电子元件(MCU、传感器、通信接口等)免受损坏,是工业控制、通信设备、消费电子等领域的常用防护器件。

一、产品基本信息

SMAJ43CA的核心定位为双向过压保护器件,关键基础信息如下:

  • 品牌:伯恩半导体(BORN)
  • 类型:双向TVS二极管
  • 封装:DO-214AC(行业俗称SMA封装,表面贴装)
  • 核心功能:瞬态过压抑制(ESD、浪涌防护)
  • 极性:双向(无需区分正负极,简化电路设计)

二、核心电性能参数

SMAJ43CA的电性能参数经严格测试规范,关键指标如下(测试条件均为标准环境,部分需参考官方 datasheet):

参数名称 数值/规格 说明 反向截止电压(Vrwm) 43V 正常工作时可承受的最大反向直流电压,决定适用电压域(如24V系统留有余量) 击穿电压(Vbr) 52.8V(@1mA DC) 器件开始导通的电压阈值,需与系统工作电压匹配避免误触发 钳位电压(Vc) 69.4V(@Ipp=5.8A) 瞬态过压时钳位到的最大安全电压,直接影响后端元件防护效果 峰值脉冲电流(Ipp) 5.8A(10/1000μs波形) 可承受的瞬态峰值电流,对应峰值脉冲功率400W 反向漏电流(Ir) 1μA(@Vrwm=43V) 低漏电流特性,适合低功耗应用场景 峰值脉冲功率(Ppp) 400W(10/1000μs波形) 瞬态过压下的最大耗散功率

注:10/1000μs为标准浪涌测试波形(上升时间10μs,半峰值时间1000μs)。

三、封装与物理特性

SMAJ43CA采用DO-214AC(SMA)表面贴装封装,具有以下优势:

  1. 小型化设计:封装尺寸紧凑(典型值:2.8mm×1.6mm×0.4mm),可节省PCB空间,适配高密度布线;
  2. 焊接可靠性:兼容回流焊、波峰焊等常规工艺,焊接后机械强度稳定,无虚焊风险;
  3. 环境适应性:符合RoHS环保标准(无铅无卤),工作温度范围为-55℃至+150℃,满足工业级/消费级场景要求;
  4. 易集成:双向极性无需区分正负极,可直接并联于被保护端口/元件两端,简化电路设计。

四、典型应用场景

结合参数特性,SMAJ43CA主要应用于12V/24V电压域的过压防护,典型场景包括:

  1. 通信设备:路由器、交换机、无线AP的电源端口、以太网接口防护(抑制雷击感应浪涌、ESD);
  2. 工业控制:PLC、远程IO模块、传感器节点的24V直流系统防护(抑制电机启停尖峰电压);
  3. 消费电子:机顶盒、智能家居控制器、智能音箱的USB接口、电源端口防护(避免ESD及电源波动);
  4. 汽车电子:车载辅助系统(倒车雷达、行车记录仪、胎压监测)的低电压域防护(需配合汽车级TVS增强可靠性)。

五、选型与应用注意事项

  1. 参数匹配:需确保系统工作电压≤43V(Vrwm),避免器件在正常工作时误导通;
  2. 脉冲能量验证:实际瞬态脉冲能量需≤400W(Ppp),若脉冲强度较高,可并联多个器件或选择更高功率TVS;
  3. 布局建议:TVS应尽可能靠近被保护元件/端口,减少布线电感对防护效果的影响;
  4. 焊接规范:回流焊峰值温度≤260℃(时间≤30秒),避免高温损坏器件。

总结

SMAJ43CA凭借双向防护、低漏电流、小型化封装及可靠的过压能力,成为12V/24V系统中敏感元件防护的优选器件,适用于通信、工业、消费电子等多领域,可有效提升电路抗干扰能力,降低元件损坏风险。

(注:以上参数及特性均基于伯恩半导体公开资料,具体应用需参考官方完整 datasheet。)

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