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CJ SMAJ12CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ SMAJ12CA
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- SMAJ12CA
- Electronic Component
- 1
- Package
- SMAG
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.11g
- Electronic Component
- 1
- Electronic Component
- BM0233613190
- Voltage
- 19.9V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 13.3V
- 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.
SMAJ12CA TVS二极管产品概述
一、产品简介
SMAJ12CA 是 CJ（江苏长电/长晶）生产的双向瞬态抑制二极管（TVS），采用 SMA G（SMAG）封装，专为保护中低电压电源线与信号线免受浪涌、雷击及静电放电（ESD）等瞬态电压冲击设计。器件结构为双向，适用于需对正负脉冲均衡保护的线路。
二、主要参数
- 极性：双向
- 反向截止电压 Vrwm：12 V
- 击穿电压（Vbr）：13.3 V
- 钳位电压（Vclamp）：19.9 V
- 峰值脉冲电流 Ipp：20.1 A
- 峰值脉冲功率 Ppp：400 W
- 反向电流 Ir：5 μA（在指定 Vrwm 下）
- 类型：TVS，封装：SMAG
三、产品特点
- 双向结构，可同时抑制正向与反向瞬态；
- 高峰值吸收能力（Ppp = 400 W），适合中等能量浪涌场合；
- 低反向漏流（Ir ≈ 5 μA），对待保护电路静态功耗影响小；
- 钳位电压相对较低（≈19.9 V），可有效降低过压对下游元件的冲击。
四、典型应用场景
- 12 V 电源总线、汽车电子辅助电路、通信设备与工业控制器的浪涌及ESD保护；
- 信号线或双向传输线路的瞬态抑制；
- 需要中等电流吸收能力且空间受限的 PCB 保护设计。
五、选型与使用建议
- 确认系统工作电压不超过 Vrwm（12 V），且被保护器件最大承受电压高于钳位电压；
- 留意钳位电压是否能保护下游元器件，若要求更低钳位应选更低Vclamp型号；
- 在 PCB 布局上将 TVS 靠近受保护端口放置，缩短接地回流路径以提高防护效果；
- 考虑热量与反复浪涌的寿命影响，必要时并联或选择更高功率等级产品。
六、封装与可靠性注意
SMAG（SMA）封装便于自动贴片和波峰/回流焊工艺，但焊接时应遵循厂家推荐的温度曲线以避免封装应力和参数漂移。长期可靠性与浪涌次数有关，建议在关键场合做实际浪涌测试验证。
结语：SMAJ12CA 为一种适用于 12V 级别系统的中等功率双向 TVS，兼顾体积与防护能力，在汽车辅助、工业与通信等场合具有较好的实用性。
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