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DOWO SMBJ20CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMBJ20CA
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMBJ20CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.21g
- Electronic Component
- 1
- Electronic Component
- BM0264254679
- Operating Temperature
- 55℃~+150℃
- Voltage
- 32.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 22.2V
- 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.
SMBJ20CA 产品概述
一、核心参数
- 型号：SMBJ20CA（品牌：DOWO/东沃）
- 类型：双向瞬态电压抑制二极管（TVS）
- 反向工作电压 Vrwm：20 V
- 击穿电压 VBR：22.2 V
- 钳位电压（Ipp）：32.4 V
- 峰值脉冲电流 Ipp：18.2 A（波形 10/1000 μs）
- 峰值脉冲功率 Ppp：600 W（10/1000 μs，重复率/占空比 0.01%）
- 反向泄漏电流 Ir：≤1 μA（在 Vrwm 条件下）
- 工作温度范围：-55 ℃ ～ +150 ℃
- 极性：双向（亦有单向/双向可选单元）
- 封装：SMB (DO‑214AA)
- 芯片处理：玻璃钝化，符合 RoHS 标准
二、主要特性
- 玻璃钝化芯片保证长期稳定性与耐环境能力，降低热斑与漏电漂移。
- 600 W 峰值脉冲功率（10/1000 μs）能有效吸收雷击与开关瞬态能量，适合中等能量冲击保护场合。
- 低泄漏电流（≈1 μA），对敏感电路影响小，适用于信号线及电源线保护。
- 出色的钳位性能：在规定脉冲电流下将电压钳位在低于器件耐受范围内，保护下游元件安全。
- 双向结构便于交流/双向瞬变保护，无需方向判断与极性约束。
- 响应速度极快，能够在瞬态出现的初始阶段进行限制。
三、典型应用场景
- 电源线路过电压保护（包括直流与交流系统）
- 通信设备与接口保护（如串口、以太网端口的浪涌防护）
- 汽车电子非车身主电源的局部保护（需核对汽车级认证时限）
- 工业控制设备、逆变器接口、楼宇自控系统的瞬态抑制
- 电池管理、充电桩外围保护（视具体系统能量需求配合使用）
四、使用与布板建议
- 器件应尽量靠近需保护端口布置，走线最短以减小寄生电感。
- 为保证热量扩散，焊盘与地/电源层应设计合理的热沉能力，必要时并联多只器件以分散脉冲能量。
- 对于频繁、大能量冲击场合，需按占空比/重复率进行功率降额使用或采用更高 Ppp 等级器件。
- 双向器件在直流系统中会引入双向电流通路，选型前确认系统极性与漏电容影响。
五、封装与可靠性
- SMB（DO‑214AA）封装兼顾功率散热与自动贴装工艺，适合表面贴装生产线。
- 玻璃钝化工艺提升热稳定性与长期可靠性，适合宽温应用（-55 ℃ ～ +150 ℃）。
- 满足 RoHS 要求，适合电子设备环保法规合规性需求。
六、选型与采购建议
- 若保护对象为直流单向线路，优先考虑单向型号以降低正向压降影响；交流或对称脉冲场合推荐 SMBJ20CA 双向型号。
- 在实际系统中，参考峰值脉冲电流 Ipp 与钳位电压，确保下游器件在钳位水平下仍能承受。
- 采购时确认样品检验并留意器件批次与存储条件（避免高温潮湿），生产时遵循推荐回流焊温度曲线。
如需器件详细电气特性曲线、脉冲测试条件或 PCB 设计参考图，可提供进一步资料和应用支持。
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