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FUXINSEMI SS34A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- FUXINSEMI SS34A
- Type
- FUXINSEMI
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- FUXINSEMI
- Electronic Component
- SS34A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.099g
- Electronic Component
- 1
- Electronic Component
- BM0264480214
- Current
- 3A
- Diode
- Electronic Component
- Current(Ir)
- 500uA
- (Vf)
- 550mV@3A
- Electronic Component
- 55℃~+150℃
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SS34A 肖特基二极管（FUXINSEMI 富芯森美）产品概述
一、主要特性与电气参数
SS34A 是一款独立式肖特基整流二极管，制造商：FUXINSEMI（富芯森美）。其关键参数如下：
- 正向压降（Vf）：约 0.55 V（在 If = 3 A 时测得）
- 直流反向耐压（Vr）：40 V
- 连续整流电流：3 A
- 反向电流（Ir）：约 500 µA（在规定测试条件下）
- 非重复峰值浪涌电流（Ifsm）：80 A
- 工作结温范围：-55 ℃ 至 +150 ℃
- 封装：SMA（DO-214AC），独立式贴片/轴向兼容封装
该器件以低正向压降和快速开关特性为主要卖点，适合对效率和热量控制有要求的中功率整流应用。
二、封装与热性能
SS34A 采用 SMA（DO-214AC）封装，体积小、焊接方便，适用于自动贴片与回流焊工艺。由于肖特基二极管的正向压降随电流和温度上升，3 A 连续工作时需关注PCB散热设计。建议在封装底部及周边提供足够的铜箔面积作为散热路径，并考虑串联/并联方式或增加散热片以降低结温，确保长期可靠性。
三、典型应用场景
- 开关电源（SMPS）次级整流
- DC-DC 变换器输出整流与续流保护
- 电池充放电保护与电源反向接反保护
- LED 驱动、车载电源及通讯设备电源管理
其低 Vf 优势可以减少整流损耗、提高转换效率，尤其在高频开关场合收益明显。
四、使用要点与注意事项
- 反向泄漏随温度显著增加：在高温工况下 Ir 可能上升，需评估漏电对系统的影响。
- 极限参数与实际工况：Ifsm 为非重复浪涌能力，频繁或持续过载会损伤器件，设计时应优先考虑热裕度与峰值抑制。
- 焊接与热循环：遵循封装厂推荐的回流曲线，避免过长高温暴露导致器件性能退化。
- 反向电压限制：Vr = 40 V，适用于中低压场合，若系统最高电压接近或超过该值，应选用更高耐压型号。
五、选型建议与对比参考
当目标为提升整流效率、降低开关损耗且系统电压 ≤ 40 V 时，SS34A 是性价比较高的选择。若系统工作电压更高或对反向漏电有严格限制，可考虑更高耐压或漏电更低的肖特基/超结器件。对比同类产品时，应同时参考 Vf（不同电流点）、Ir 在不同温度下的曲线以及封装热阻。
六、总结
SS34A（FUXINSEMI）凭借 0.55 V@3 A 的低正向压降、3 A 的整流能力和 80 A 的浪涌承受力，在中功率电源整流、续流保护和电池管理等场景中表现良好。合理的PCB散热设计与工作点选择能充分发挥其效率优势，若系统存在高温或高电压工况，应在选型阶段进行充分验证与对比。
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