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MDD SMAJ30A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SMAJ30A
- Type
- MDD
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- SMAJ30A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.094g
- Electronic Component
- 1
- Electronic Component
- BM0229465218
- Operating Temperature
- 65℃~+150℃
- Voltage
- 48.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 36.8V
- 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.
SMAJ30A（MDD）TVS 二极管产品概述
一、产品简述
SMAJ30A 是 MDD 出品的单向瞬态电压抑制（TVS）二极管，封装为 SMA（DO-214AC），专为保护直流电源线和敏感电子元件免受雷击浪涌、电源瞬变和开关瞬态影响而设计。器件在 10/1000µs 波形下可承受峰值脉冲功率 400W，适用于工业、通信、汽车电子及电力系统的浪涌保护场景。
二、主要电气参数
- 反向工作电压（Vrwm）：30V（额定钳位前工作电压）
- 击穿电压（Vbr）：约 36.8V
- 钳位电压（Vc）：48.4V（在额定脉冲条件下）
- 峰值脉冲功率（Ppp）：400W（10/1000µs）
- 峰值脉冲电流（Ipp）：8.3A（10/1000µs）
- 反向漏电流（Ir）：典型 1µA（在 Vrwm 条件下）
- 极性：单向（用于直流线路）
- 工作温度范围：-65℃ 至 +150℃
这些参数表明 SMAJ30A 在 30V 以下的直流系统中能提供可靠的过压钳制，并在高能量短时脉冲下将电压限制在约 48V 左右，从而保护后端电路免受损害。
三、封装与机械特性
SMA（DO-214AC）封装体积小、焊接可靠，便于自动化贴装和回流焊工艺。封装良好的热传导有助于在短脉冲能量下快速散热，但在重复高能量冲击下仍需注意 PCB 热管理与散热设计。
四、典型应用场景
- 工业电源和控制系统的浪涌保护
- 通信设备的电源线上电压瞬变抑制
- 汽车 12V/24V 子系统的瞬态抑制（须按系统要求评估）
- 电源模块接口、继电器驱动和电机驱动等含开关瞬态的线路
五、使用建议与注意事项
- 布局：将 TVS 器件尽量靠近被保护端口放置，连接线短且粗，减少串联电感与电阻，以获得最佳钳位效果。
- 热管理：尽管器件能承受短时间高功率脉冲，但长期或频繁的高能冲击会造成热累积，应评估平均功率和事件频率，必要时并联或选用更高能量等级器件。
- 极性：单向 TVS 在正向导通时类似串联二极管，请按电路极性正确安装；不可用于要求双向保护的交流线路，除非另行设计。
- 环境：器件工作温度范围宽（-65℃~+150℃），适应恶劣环境；但在极端高温下工作时，参考厂商数据表进行电气参数的温度漂移评估。
- 不应将 TVS 用作持续稳压器；其设计用于瞬态事件的能量吸收，不适合长期承受过压。
六、验证与选型提示
在选型时，应对系统可能出现的最大冲击电流、脉冲波形（例如 8/20µs、10/1000µs 等）及允许钳位电压进行校核。若系统允许的最大钳位电压低于 48.4V，应选择额定钳位更低或能承受更大电流的型号。评估时还要考虑 PCB 阻抗、环境温度、事件重复率等因素。
SMAJ30A 以其小型封装、高脉冲承受能力和低漏电流的特点，适合要求体积小且需要稳健瞬态防护的直流电路保护。选用时结合系统实际浪涌能量与允许钳位范围进行验证，可在可靠性与成本间取得平衡。
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