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Jingdao Microelectronics SMAJ33CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMAJ33CA
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- SMAJ33CA
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Electronic Component
- BM0227663749
- Voltage
- 53.3V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 40.6V
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ33CA（SMA封装）产品概述 — 晶导微电子
一、产品简介
SMAJ33CA 是晶导微电子推出的一款双向瞬态抑制二极管（TVS），采用SMA封装，专为抑制瞬态过电压和浪涌能量设计。器件在脉冲冲击情况下能迅速钳位电压，保护下游敏感器件免受瞬时高压损坏。
二、主要参数
- 类型：双向 TVS 二极管（SMA封装）
- 反向截止电压 Vrwm：33 V
- 击穿电压（Vz/击穿）：约 40.6 V
- 钳位电压（Vc）: 53.3 V（在指定脉冲条件下）
- 峰值脉冲功率 Ppp：400 W（10/1000 μs 波形）
- 峰值脉冲电流 Ipp：7.5 A
- 反向漏电流 Ir：≤ 1 μA
三、关键特性与优势
- 双向结构：对正负极性瞬态均能进行对称钳位，适合交流或可反向的电源/信号线保护。
- 高脉冲功率吸收能力：在10/1000 μs波形下可承受高达400 W的单次脉冲能量，适用于较长脉冲宽度的浪涌场景。
- 低漏电流：工作时对电路静态耗电影响小，适合对待机功耗敏感的系统。
- 标准SMA封装：体积小、易于表面贴装，便于批量生产与替换。
四、典型应用场景
- 工业24 V/（30～33 V）电源总线浪涌保护
- 电机驱动、继电器驱动等能产生感性尖峰的控制回路
- 通信接口、信号线及八字型供电节点的瞬态保护
- 要求双向抑制的系统（如可逆供电或交流小功率线路）
五、封装与布局注意
- SMA 贴片封装，建议靠近被保护端口放置，走线尽量短且宽，减小寄生感抗和电阻。
- 如可能，在焊盘处设计较大散热铜箔以利散热；在连续或高频率浪涌场合应考虑额外热管理或增加串联限流元件（熔断器、限流电阻）。
六、选型与使用要点
- 确认电路最大持续工作电压不超过 Vrwm（33 V），并保证钳位电压（53.3 V）不会超过被保护器件的耐压限制。
- 对于超过单次Ipp或能量的冲击，应配合外部限流器件或多级保护方案。
- 在高温环境下注意参数漂移与寿命影响，必要时选用更高功率等级的器件或并联使用（并联需注意匹配与热均衡）。
七、可靠性与测试建议
- 在最终方案中应进行实际浪涌/脉冲注入测试（同波形 10/1000 μs 或客户关心的波形），验证钳位电压与器件温升。
- 做ESD、雷击（LISN）和连续冲击循环测试以评估长期可靠性与重复冲击承受能力。
八、结论
SMAJ33CA（SMA 封装）凭借双向抑制、400 W 脉冲吸收能力和低漏电的特点，是保护33 V 级电源与相关信号线的实用选择。在布局、限流与热管理措施得当的前提下，可为工业、通信及电源系统提供稳定可靠的瞬态过压保护。若需应对更高能量或特殊脉冲波形，建议做样品验证或咨询厂商获取更详细的应用支持。
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