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DOWO SMBJ12CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMBJ12CA
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMBJ12CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.215g
- Electronic Component
- 1
- Electronic Component
- BM0231093690
- Operating Temperature
- 55℃~+150℃
- Voltage
- 19.9V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 13.3V
- 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.
SMBJ12CA 产品概述
一、产品简介
SMBJ12CA 是东沃（DOWO）出品的一款双向瞬态电压抑制二极管（TVS），封装为 SMB（DO-214AA） 表面贴装型。器件为 12V 额定工况的瞬态浪涌保护元件，专为抑制雷击、浪涌及电磁脉冲等瞬态过压事件而设计，适用于直流/交流线路和敏感电子模块的前端保护。
二、主要电气参数
- 钳位电压（Vc，典型）：19.9 V
- 工作温度范围：-55 ℃ ~ +150 ℃
- 击穿电压（VBR，典型）：13.3 V
- 反向额定电压（Vrwm）：12 V
- 峰值脉冲功率（Ppp）：600 W（10/1000 μs 波形）
- 峰值脉冲电流（Ipp）：30.15 A（对应 600 W@10/1000 μs）
- 反向漏电流（Ir）：1 μA（在 Vrwm 条件下）
- 极性：双向（适用于正负对称浪涌抑制）
- 类型：TVS，SMB 封装 SMT 可回流焊接
三、主要特性
- 高能量吸收能力：在 10/1000 μs 波形下可承受 600 W 峰值脉冲功率，适合直击/感应雷击及工业电源浪涌场景。
- 低漏电流：Vrwm 下典型漏电 1 μA，有利于低功耗或待机电路的可靠性。
- 宽工作温度：满足工业级 -55 ℃ 至 +150 ℃ 的严苛环境要求。
- 双向设计：无需极性区分，便于对交流线路或双极性瞬态的保护配置。
四、典型应用
- 通讯设备、电源输入端、直流配电保护
- 工业控制、逆变器、变频器的浪涌防护
- 汽车电子的瞬态抑制（需核对汽车级认证）
- 家电、楼宇自控与安防设备的输入保护
五、封装与热管理
SMB（DO-214AA）为中功率 SMD 封装，便于自动化贴装与回流焊。尽管吸收能量大，仍需合理的 PCB 散热设计：增大焊盘铜箔面积、使用热过孔或加强底层铜层，有助于降低结温并提升重复脉冲寿命。
六、使用与布局建议
- 将 TVS 尽量靠近被保护器件或输入端放置，缩短走线以减少串联感性。
- 为提高保护能力，可并联合适的限流器件（保险丝、PTC）或串联阻抗以分担能量。
- 对于高频电路或对电容敏感的接口，需评估 TVS 的结电容对信号完整性的影响（产品手册中查阅 Cj）。
- 避免长期在接近最大脉冲功率下运行，必要时考虑更高规格的 TVS 或多级保护方案。
七、选型与可靠性提示
选型时以 Vrwm 与系统工作电压匹配为先；若被保护线路存在较大摆幅或直流偏置，优先考虑双向或单向型的适配性。器件在额定温度与推荐波形下能够提供稳定保护，长期可靠性依赖于正确的 PCB 散热、合理的过流限制与避免重复接近峰值能量的冲击。
结语：SMBJ12CA 以其 12V 级别的反向额定电压、19.9V 的典型钳位以及 600W 的脉冲吸收能力，为需要中等能量浪涌保护的工业与民用电子设备提供了成本与性能兼顾的解决方案。购买与应用前建议参考厂商完整数据手册以获取测试条件、典型电气曲线与机械尺寸。
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