Model & package intelligence
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DOWO SMAJ43A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ43A
- Type
- DOWO
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ43A
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Electronic Component
- BM0264356067
- Operating Temperature
- 55℃~+150℃
- Voltage
- 69.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 47.8V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ43A 产品概述
一、产品简介
SMAJ43A 是 DOWO(东沃) 推出的一款高能量吸收型瞬态电压抑制器（TVS），采用玻璃钝化芯片，封装为 DO-214AC（SMAJ）。该器件为单向工作结构，专为保护电源线、数据线和其他敏感电子元件免受瞬态过电压（如雷击浪涌、电源切换瞬变和电气干扰）而设计。
二、主要电气参数
- 工作反向截止电压 Vrwm：43 V（单向）
- 击穿电压 VBR（IR=1 mA）：47.8 V
- 钳位电压（Ipp 条件下）：69.4 V
- 峰值脉冲电流 Ipp：5.76 A（波形 10/1000 μs）
- 峰值脉冲功率 Ppp：400 W（波形 10/1000 μs，重复率/占空比 0.01%）
- 反向漏电流 Ir：1 μA（典型，常温）
- 工作温度范围：-55 ℃ 至 +150 ℃
三、关键特性
- 玻璃钝化芯片，提供卓越的可靠性与稳定性。
- 400 W 峰值脉冲吸收能力（10/1000 μs），对雷击与浪涌具有良好缓冲能力。
- 低漏电流设计，降低静态功耗和漏电对系统的影响。
- 出色的钳位能力，可在冲击期间将过电压限制在安全水平。
- 极快响应时间，能在瞬时过压发生时迅速导通分流（TVS 器件典型行为）。
- 提供单向与双向单元选择，适配不同电路拓扑。
- 符合 RoHS 环保标准。
四、典型应用场景
- 开关电源与直流母线浪涌保护（DC 保护）。
- 通信设备的接口保护（以太网、串行总线等）。
- 工业控制与自动化设备，抗干扰与雷击防护。
- 汽车电子、楼宇电气及仪器仪表的输入端浪涌抑制。
- 消费电子及电源适配器的过压保护。
五、封装与可靠性
SMAJ43A 采用 DO-214AC（SMAJ）封装，便于自动化贴装与回流焊工艺。玻璃钝化芯片结构在温度循环、湿度和长期应力下表现出良好的稳定性。器件的工作温度覆盖 -55℃ 到 +150℃，适合多种严苛工作环境。
六、使用与布局建议
- 将 TVS 靠近需保护的器件或接口放置，缩短走线以降低感性串联阻抗。
- 输入侧与大地之间应做好良好接地，必要时配合熔断器或限流元件以提高系统安全性。
- 注意回流焊温度曲线与厂商推荐的焊接规范，避免因过热影响器件可靠性。
- 对重复冲击场景建议留有功率裕量，并按照占空比（0.01%）控制脉冲能量。
七、包装与订购信息
- 品牌：DOWO（东沃）
- 封装：DO-214AC（SMAJ）
- 型号：SMAJ43A（单向）
购买时请确认单向或双向版本、包装形式（卷带/散装）及最小订购量，并向供应商索取完整的器件数据手册以便进行电路验证与可靠性评估。
若需该器件的完整电气特性曲线、冲击波形下的钳位特性表或样品支持，可提供进一步需求，我可协助准备对比建议与选型替代方案。
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