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Jingdao Microelectronics SMCJ28A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMCJ28A
- Type
- Jingdao Microelectronics
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- SMCJ28A
- Electronic Component
- 1
- Package
- SMC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.381g
- Electronic Component
- 1
- Electronic Component
- BM0229356815
- Operating Temperature
- 55℃~+150℃
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 34.4V
- 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.
SMCJ28A TVS 二极管（SMC）产品概述
一、产品概述
SMCJ28A 是晶导微电子推出的一款高能量瞬态电压抑制（TVS）二极管，封装为 SMC（DO-214AB）。器件面向脉冲浪涌保护场景，适用于电源线、数据线及工业接口的瞬态过压钳制，能够在瞬间吸收大能量脉冲，保护下游敏感器件和电路免受浪涌损坏。
二、主要参数与含义
- 钳位电压 Vc：45.4V（表征在指定脉冲条件下对电压的钳制能力）；
- 工作温度：-55℃ ~ +150℃（适用于严苛环境）；
- 击穿电压 Vbr：34.4V（器件进入雪崩导通的起始电压）；
- 反向截止电压 Vrwm：28V（器件在正常工作状态下允许的最高直流工作电压）；
- 峰值脉冲功率 Ppp：1.5kW @ 10/1000μs（定义器件在10/1000μs波形下能承受的瞬态功率）；
- 峰值脉冲电流 Ipp：33.1A（对应上述脉冲波形的峰值电流）；
- 反向电流 Ir：1μA（在 Vrwm 条件下的泄漏电流，表示低泄漏特性）。
三、产品特性
- 高能量吸收能力（1.5kW@10/1000μs），适合冲击性浪涌保护；
- 钳位效率高，45.4V 的钳位电平能有效限制过压幅度；
- 宽温工作范围，适应工业与汽车级温度要求；
- 低反向漏电流，有利于电源效率与低功耗系统使用。
四、典型应用场景
- 开关电源、直流母线保护；
- 通信接口与数据线过压防护；
- 工业控制、电机驱动与传感器接口的浪涌抑制；
- 汽车电子（符合宽温要求的外围保护电路）。
五、封装与安装建议
- SMC（DO-214AB）贴片封装，适合自动贴装与回流焊工艺；
- 推荐将 TVS 尽量靠近被保护端口放置，缩短走线以降低寄生电感；
- 在焊盘布局上保证良好热散路径，必要时在 PCB 底层加入散热铜箔或过孔；
- 回流焊温度曲线应符合器件厂家推荐，以免影响可靠性。
六、选型与使用注意
- 确认系统最大工作电压不超过 Vrwm（28V），且考虑工作裕度；
- 若系统存在双向交流脉冲，需确认所选为单向或双向型号；SMCJ28A 如为单向，反向极性需按规格使用；
- 在频繁浪涌或高能量场合，应考虑并联或使用更高能量等级器件；
- 设计时结合 PCB 布局、电感和串联阻抗评估实际钳位电压是否满足保护需求。
七、可靠性与环境适应
器件额定工作温度 -55℃ 至 +150℃，并具有低漏电与高能量承受能力，适合工业及恶劣环境。长期稳定性依赖于正确的焊接工艺、热管理与在额定条件内使用。
八、总结
SMCJ28A（晶导微电子）是一款适用于工业与电源防护的高能 TVS 器件，具有较高的瞬态吸收能力、明确的钳位电平与宽温工作范围。在实际应用中需严格遵循 Vrwm 与热散要求，并结合 PCB 布局优化以发挥最佳保护效果。
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