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DOWO SMAJ400CA
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ400CA
- Type
- DOWO
- Minimum package
- 5000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ400CA
- Electronic Component
- 1
- Package
- SMA(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
- BM0231033196
- Operating Temperature
- 55℃~+150℃
- Voltage
- 648V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 447V
- 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.
SMAJ400CA 产品概述
一、概述
SMAJ400CA 是东沃（DOWO）推出的一款高能量瞬态抑制二极管（TVS），采用 SMA（DO-214AC）贴片封装，属于双向（Bi‑directional）保护器件。器件专为对抗雷击、开关冲击和其它瞬态过电压设计，能够在高压系统中提供快速、可靠的浪涌钳位保护。
二、主要电气参数
- 极性：双向
- 反向截止电压（Vrwm）：400 V
- 击穿电压（Vbr）：447 V（典型/参考）
- 钳位电压（在峰值脉冲电流时）：648 V
- 峰值脉冲电流（Ipp）：620 mA
- 峰值脉冲功率（Ppp）：400 W
- 反向漏电流（Ir）：1 μA（在 Vrwm 条件下）
- 工作温度范围：-55 ℃ ~ +150 ℃
- 封装：SMA（DO‑214AC）
三、产品特性与优势
- 高能量吸收能力：Ppp=400W，可在短时冲击下有效钳位，保护后级器件免遭过压破坏。
- 双向保护：无需考虑极性，适合交流或双向瞬变场景（如AC线、桥式整流器两端）。
- 低漏电流：Ir ≈1 μA，有利于高压直流系统在待机或低功耗状态下维持低泄漏。
- 宽工作温度：-55～+150 ℃，适应严苛工业及户外环境。
- 紧凑封装：SMA 表面贴装工艺，便于自动化装配，节省 PCB 空间。
四、典型应用场景
- 高压直流母线及电源输入端浪涌保护
- 太阳能逆变器、光伏串联侧防护
- 工业控制、变频器和伺服驱动的输入保护
- LED 路灯/驱动器、充电桩、电动工具等高压设备防护
- 通信基站与电源模块的瞬态吸收
五、封装与安装建议
SMA（DO‑214AC）为常见的中功率表面贴装封装。布局时注意加大焊盘与散热铜箔面积，以利于热量散出。推荐使用推荐的 PCB 焊盘尺寸与回流焊工艺，避免长时间超过器件允许温度。为提高系统可靠性，可在 TVS 前端配合熔断器或限流电阻以分担能量。
六、使用注意事项
- 器件为双向钳位元件，正反向对称工作；安装时无需方向区分，但需保持良好焊接。
- 钳位电压为在额定脉冲电流下的典型值，实际电路中应预留足够的安全裕量以保护敏感器件。
- 长时间潮湿或高温环境下应遵循元器件储存与回流规范，避免性能退化。
- 在高能量冲击场合，建议参考完整 Datasheet 进行热应力和能量分配计算，必要时选用更高功率等级或并联/串联方案。
七、采购与技术支持
型号：SMAJ400CA；品牌：DOWO（东沃）；封装：SMA（DO‑214AC）。如需样品、包装信息或详细电气特性曲线（如V‑I曲线、脉冲响应、热阻参数等），请联系东沃或其授权分销商获取完整 datasheet 与应用建议，以便在具体系统中正确选型与应用。
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