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BORN SMFJ28A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMFJ28A
- Type
- BORN
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- SMFJ28A
- Electronic Component
- 1
- Package
- SOD-123F
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.039g
- Electronic Component
- 1
- Electronic Component
- BM0258880914
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 31.1V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMFJ28A 瞬态抑制二极管产品概述
一、产品简介
SMFJ28A 是 BORN（伯恩半导体）推出的一款单向瞬态电压抑制（TVS）二极管，专为抑制瞬态过电压和浪涌冲击设计。器件在标准封装 SOD-123F 中提供，适合表贴安装，用于保护电源轨、车载电子和工业接口等对抗雷击、开关瞬变与静电放电（ESD）的应用场景。
二、主要电气参数
- 极性：单向
- 反向稳压（Vrwm）：28 V（稳压工作电压）
- 击穿电压（Vbr）：31.1 V（典型）
- 钳位电压：45.4 V @ 4.4 A
- 峰值脉冲电流（Ipp）：4.4 A
- 峰值脉冲功率（Ppp）：200 W（标准脉冲条件下）
- 反向漏流（Ir）：1 μA（常温，Vrwm 下）
- 类型：TVS，封装：SOD-123F，品牌：BORN
三、器件特点与优势
- 单向结构对正向瞬态具有快速钳位能力，钳位电压 45.4 V（4.4 A）可有效限制高幅度脉冲对下游电路的冲击。
- 低反向漏流（约 1 μA），适合对静态功耗敏感的系统。
- SOD-123F 小体积，适合高密度 PCB 布局，同时具备良好热散能力。
- 峰值功率 200 W 表明在规定脉冲条件下具有较强的瞬态吸收能力，适用于工业级脉冲抑制需求。
四、典型应用场景
- 28 V 类电源轨的浪涌和反向瞬变保护（例如工业控制、电源模块）。
- 汽车电子的局部防护（非车规级要求时的辅助保护）。
- 接口保护：供电线、串行总线或其它中高压信号线的瞬态抑制。
- 通用电子设备的浪涌抑制与设备可靠性提升。
五、设计与布板注意事项
- 尽量将 TVS 器件靠近保护点（如接头、连接器或IC 引脚）布置，缩短引线长度以减小感性串扰与提升响应速度。
- 钳位电压为45.4 V（在 4.4 A 时），需确认被保护元件能承受该钳位峰值；若下游器件耐压较低，应选用更低钳位的型号或增加串联元件。
- 注意器件的热耗散路径，SOD-123F 虽小巧但需要靠近铜箔散热或增加过孔以提升脉冲能量承受能力。
- 焊接和回流工艺需遵循厂家热循环建议，避免超出封装耐温导致可靠性下降。
六、选型与可靠性建议
- 当系统稳态电压接近 28 V 时，SMFJ28A 的 Vrwm 与系统电压匹配良好，可作为高压轨的首选保护件。
- 若应用涉及更高能量的脉冲或更长脉冲宽度，应核对脉冲波形条件并考虑并联更高能量等级的 TVS 或外加延时/限流元件。
- 长期高温工作会增加漏流，应在热设计和器件额定温度范围内使用，必要时进行老化和环境应力测试以验证可靠性。
总结：SMFJ28A 以其适配 28 V 轨的稳压点、较低漏流与 200 W 的瞬态吸收能力，在中等能量浪涌抑制场景中表现平衡，适合小型化 PCB 设计的电源与接口保护。如需用于更严苛的汽车或高能脉冲环境，请结合实际脉冲条件与热管理做进一步评估。
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