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Jingdao Microelectronics SMAJ120A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMAJ120A
- Type
- Jingdao Microelectronics
- Minimum package
- 5000
Technical parameters
- Electronic Component
- Electronic
- Electronic Component
- SMAJ120A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0229305238
- Voltage
- 193V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 133V
- Electronic Component
- 5000
- Power(Ppp)
- 400W
- Current(Ipp)
- 2.1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ120A — TVS 二极管 产品概述
一、产品简介
SMAJ120A 为晶导微电子出品的单路 TVS（瞬态抑制二极管），采用 SMA（DO-214AC）表面贴装封装，专为保护对瞬态过电压敏感的电源与信号线路设计。器件在正常工作电压下漏电小、响应迅速，可在瞬态脉冲事件中钳制电压，保护后端元件免受损坏。
二、主要电气参数
- 反向截止电压 Vrwm：120 V（工作耐压基准）
- 击穿电压（Vbr）：133 V（典型）
- 钳位电压（Vclamp）：193 V（在峰值脉冲条件下）
- 峰值脉冲电流 Ipp：2.1 A
- 峰值脉冲功率 Ppp：400 W（短脉冲条件下）
- 反向电流 Ir：1 μA（在 Vrwm 条件下的典型泄漏）
- 通道数：单路
以上参数表征了器件的耐压能力、在瞬态能量注入时的钳位表现及静态泄漏，设计时应参照具体应用的脉冲幅值与能量选择合适余量。
三、主要特性与优势
- 高耐压体系：120 V 的工作电压适配中高压直流或脉冲场合。
- 高能量吸收能力：单次脉冲功率 400 W，可处理短时大能量干扰。
- 低泄漏电流：反向漏电仅 1 μA，适合对静态功耗敏感的电路。
- SMA 小型封装，便于自动贴装与密集布板设计。
- 单路配置，结构简单，易于并联扩流或多点保护部署。
四、典型应用场景
- 工业控制与自动化设备电源总线过压保护。
- 通信基站或网络设备高压直流供电保护。
- 电源模块、逆变器、驱动器等功率电子器件的输入保护。
- 对抗雷击、浪涌和开关瞬变的保护节点。
五、封装与安装建议
SMA（DO-214AC）为常用表面贴装封装，器件阴极通常由封装带有识别带指示。布局时建议：
- 将 TVS 尽可能靠近被保护节点和地回路，减少寄生感抗。
- 为承受脉冲热能，PCB 应提供足够的铜箔散热路径。
- 若需更高冲击能力，可并联多个器件或选择更高 Ppp 等级的型号。
六、选型与使用要点
- 钳位电压需低于被保护器件可承受的最大电压；同时 Vbr 应高于正常工作电压以避免误导通。
- 对于多次或连续冲击场合，应关注平均功耗与热稳定性，必要时采用更高能量等级或外加限流元件。
- 注意器件极性与焊接工艺，遵循无铅回流工艺规范以保证可靠焊接。
七、可靠性与规范
实际应用前请参考完整数据手册以获取温度范围、浪涌脉冲波形条件、焊接曲线及老化试验等详细规范。对于关键系统建议进行系统级雷击/浪涌测试验证。若需封装尺寸图、PCB 过孔或推荐电气测试条件，可联系厂方技术支持获取详尽资料。
SMAJ120A 以其高耐压、良好钳位能力和表贴便捷性，适用于需要在中高工作电压下提供瞬态过压保护的各类工业与通信应用。
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