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TWGMC SMAJ28CA Bidirectional TVS Diode SMAJ28CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMAJ28CA
- Type
- TWGMC
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TWGMC
- Electronic Component
- SMAJ28CA
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.096g
- Electronic Component
- 1
- Electronic Component
- BM0227688451
- Operating Temperature
- 65℃~+150℃
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 34.4V
- 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.
SMAJ28CA（TWGMC 台湾迪嘉）产品概述
一、产品简介
SMAJ28CA 为双向瞬态抑制二极管（TVS），封装为SMA（DO-214AC），专为静电放电（ESD）与浪涌保护设计。器件在10/1000μs脉冲条件下可承受最大峰值脉冲功率400W，适用于直流/交流两向保护场合，常用于电源接口、通信线路、数据接口与工业控制设备的过压保护。
二、主要电气参数
- 反向稳压（Vrwm）：28V（工作电压）
- 击穿电压（Vbr）：34.4V（典型）
- 钳位电压（Vc）：45.4V（在指定脉冲条件下）
- 峰值脉冲功率（Ppp）：400W @ 10/1000μs
- 峰值脉冲电流（Ipp）：8.8A @ 10/1000μs
- 反向电流（Ir）：约1μA（在Vrwm下）
- 极性：双向（Bidirectional）
- 工作温度范围：-65℃ 至 +150℃
三、性能特点与优势
- 双向结构可直接用于交流或双向直流线路，无需另配反向器件；
- 低漏电流（~1μA）对系统待机功耗影响小，适合对静态功耗敏感的系统；
- 钳位电压45.4V可在有效限制过电压同时保护下游元件；
- 宽工作温度范围与SMA封装提供良好可靠性与可焊性，适合苛刻环境应用；
- 在10/1000μs浪涌波形条件下具有稳定的吸收能力，符合通信与电源浪涌试验需求。
四、典型应用场景
- 通信设备（基站、光纤收发模块、用户端设备）的线路防护；
- 工业控制与自动化设备的I/O口与电源防护；
- 电源适配器、充电设备与电池管理系统的输入端浪涌保护；
- 消费电子接口（USB、HDMI、音视频接口）在需要双向保护时的防护选择。
五、封装与使用建议
SMA（DO-214AC）封装适配自动贴片与回流焊工艺，焊盘设计建议提供足够的散热铜箔与过孔，以利于脉冲能量分散。选型时应按实际浪涌波形（例如10/1000μs或1.2/50μs）确认器件能量吸收能力，并在高能环境下考虑并联或提升额定功率的保护方案。同时建议在布局中靠近被保护端点放置TVS，减小引线与走线感抗以获得最佳钳位效果。
六、选型注意事项
- 若系统工作电压接近或超过Vrwm，应改用更高工作电压等级；
- 对长期承受高能脉冲的应用，应参考热循环与能量寿命评估并留有裕量；
- 关注封装热阻与PCB散热设计，必要时增加散热铜面或金属基板。
总结：SMAJ28CA（TWGMC）以其400W@10/1000μs的浪涌能力、45.4V钳位电压与宽温度范围，适合要求可靠、双向保护的工业与通信应用。合理的PCB设计与选型裕量能进一步发挥其长期保护效果。
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