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Jingdao Microelectronics SMAJ14CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMAJ14CA
- Type
- Jingdao Microelectronics
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- SMAJ14CA
- Electronic Component
- 1
- Package
- SMA
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.118g
- Electronic Component
- 1
- Electronic Component
- BM0230630457
- Operating Temperature
- 65℃~+150℃
- Voltage
- 23.2V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 17.2V
- 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.
SMAJ14CA TVS二极管（SMA封装）产品概述
一、产品简介
SMAJ14CA 是晶导微电子出品的一款双向瞬态电压抑制器（TVS），采用SMA封装，专为对称双向过压、浪涌以及电气瞬变保护而设计。其典型应用包括12V车载系统、通信接口、电源线路和工业控制总线等，对来向和反向脉冲均能提供快速箝位保护，防止敏感器件被高能瞬态电压破坏。
二、主要参数与特性
- 极性：双向（可在正、负方向对称工作）
- 反向截止电压（Vrwm）：14V，适配典型12V系统的工况安全余量
- 击穿电压（Vbr）：17.2V（标称）
- 钳位电压（Vc）：23.2V（典型测试值，10/1000µs波形）
- 峰值脉冲电流（Ipp）：17.2A @ 10/1000µs
- 峰值脉冲功率（Ppp）：400W @ 10/1000µs
- 反向漏电流（Ir）：1µA（常温，Vrwm条件下）
- 工作温度：-65℃ ~ +150℃
这些参数表明器件在中等能量浪涌情况下具有良好的箝位能力和低漏电特性，适合要求空间、成本受限又需要可靠防护的场景。
三、典型应用场景
- 汽车电子12V总线防护（车灯、ECU外接接口）
- 通信设备的双向信号线、数据接口（如CAN、RS-485）防浪涌保护
- 工业控制总线、传感器供电接口的瞬态浪涌抑制
- 电源适配器、输入/输出接口处做本地过压保护
四、PCB设计与布局建议
- 将SMAJ14CA尽可能贴近被保护端口或连接器放置，最短化走线以降低回路电感。
- 输入侧与保护器之间的走线宽且短，焊盘设计保证可靠热量散布。
- 对于高能量冲击，注意周边走线与接地回路的完整性，必要时在近端加大接地铜箔。
- 推荐采用合适的熔点和回流温度曲线进行焊接，避免重复焊接导致器件损伤。
- 并联使用时需谨慎：并联分流依赖封装和热特性，建议优先选用额定功率更高的单个器件。
五、可靠性与使用注意
SMAJ14CA工作温度范围宽（-65℃~+150℃），适应多种恶劣环境。实际箝位电压随测试波形、环境温度及老化有所变化；长期承受接近额定脉冲功率会缩短寿命，建议根据实际浪涌谱选型并留有余量。对于持续过电压或频繁冲击场合，考虑增加浪涌限制元件或更高功率级别的TVS。
六、封装与选型建议
SMA封装体积小、成本低，适合空间受限的终端设备。选型时依据工作电压、最大允许钳位电压和预期浪涌能量来确定：若工作电压明显高于14V或需要更低钳位电压、承受更大冲击能量，应选用更高额定功率或不同Vrwm的型号。对双向保护需求明确时选择本型号；若只需单向保护，可选单向TVS以获得更低钳位电压和更小漏电。
总结：SMAJ14CA 在SMA封装中提供了平衡的电气参数与热性能，是对12V及类似电压系统进行双向浪涌保护的经济型选择。合理布局与留有功率余量可显著提升系统可靠性。
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