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DOWO SMBJ22CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMBJ22CA
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMBJ22CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.22g
- Electronic Component
- 1
- Electronic Component
- BM0231093692
- Operating Temperature
- 55℃~+150℃
- Voltage
- 35.5V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 24.4V
- 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.
SMBJ22CA 产品概述
一、主要特性
SMBJ22CA 为 DOWO（东沃）出品的双向瞬态抑制二极管（TVS），用于抑制瞬态过电压和浪涌脉冲。该器件反向截止电压（Vrwm）为 22V，击穿电压（Vbr）约 24.4V，典型钳位电压（Vc）为 35.5V（在标称脉冲条件下）。峰值脉冲功率为 600W（10/1000μs 波形），峰值脉冲电流 Ipp 为 16.9A，双向结构使其可对正负极性瞬态同时提供保护。工作温度范围为 -55℃ 到 +150℃，反向漏电流仅 1μA，封装为 SMB（DO-214AA）。
二、电气参数要点
- 极性：双向，适合交流或双向浪涌场合；
- 反向截止电压（Vrwm）：22V；
- 击穿电压（Vbr）：约 24.4V；
- 钳位电压（Vc）：35.5V（在 10/1000μs 脉冲条件下）；
- 峰值脉冲电流（Ipp）：16.9A；
- 峰值脉冲功率（Ppp）：600W（10/1000μs）；
- 反向电流（Ir）：1μA；
- 工作温度：-55℃～+150℃。
三、典型应用场景
SMBJ22CA 适用于需要对电源线、通讯线或信号线进行高能量瞬态抑制的场合，例如工业电源、防雷保护、汽车电子（非关键车规应用需查看车规等级）、网络设备、UPS、充电桩、电机驱动及其他易受感应雷击或开关过电压影响的系统。双向结构特别适合交流耦合或双向信号线保护。
四、封装与机械特性
器件采用 SMB（DO-214AA）表面贴装封装，适合自动贴装与回流焊工艺。SMB 封装兼顾功率散热与占板面积，便于在有限 PCB 面积上实现可靠的浪涌吸收。实际 PCB 布局应留意焊盘尺寸与散热通路，必要时配合铜箔加厚或热沉设计以提升脉冲耐受能力。
五、选型与设计建议
- 若系统工作电压接近 Vrwm，应留有足够余量以防长期应力导致失效；
- 钳位电压需小于被保护元件的耐压极限，35.5V 钳位值适用于 24V 及以下系统的浪涌保护；
- 对于更高能量或更频繁浪涌的场合，可并联多只或选用更大封装/更高 Ppp 的型号；
- 布局上应将 TVS 靠近被保护端口或电源输入，尽量缩短走线以降低串联阻抗和提高响应速度。
六、可靠性与使用注意
器件额定工作温度宽，适应恶劣环境；但在实际应用中应避免长期在最大额定温度和高泄漏电流条件下连续工作。安装时遵循厂商回流焊曲线，避免机械应力集中；在高能量浪涌后建议检查器件状态，必要时更换以保证后续保护效果。
七、总结
SMBJ22CA 为一款性能均衡的双向 TVS 二极管，凭借 600W/10/1000μs 的脉冲能力、较低的反向漏电与宽工作温度范围，适合保护 24V 级及其以下电源或信号线路的瞬态过电压。合理的 PCB 布局与选型可以显著提升系统的抗浪涌能力与长期可靠性。若需更详细的电气曲线、封装尺寸或回流焊资料，建议参阅 DOWO 官方数据手册或咨询供应商技术支持。
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