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UMW SS34A UMW
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW UMW SS34A
- Type
- UMW
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- UMW
- Electronic Component
- UMW SS34A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.112g
- Electronic Component
- 1
- Electronic Component
- BM0264989553
- Current
- 3A
- Diode
- 1
- Current(Ir)
- 500uA@40V
- (Vf)
- 500mV@3A
- Electronic Component
- 55℃~+125℃
- Electronic Component
- Electronic Component
- Electronic Component
- 2000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
UMW SS34A 产品概述
一、产品简介
UMW SS34A 是一款面向中高电流开关与整流场景的表面贴装肖特基二极管。器件采用SMA（DO-214AC）塑料封装，金属-半导体（Schottky）结结构，属多数载流子导通器件，具有低正向压降和高浪涌承受力，适合高频、低压电源及保护类应用。
二、主要电气参数
- 正向压降：典型 Vf = 0.5V @ If = 3A（低压降设计，降低功耗与发热）
- 直流反向耐压：Vr = 40V（器件最高反向承受电压）
- 整流电流：If(AV) = 3A（连续整流能力）
- 反向电流：Ir ≈ 500μA @ Vr = 40V（在高逆压时的漏电特性）
- 工作结温：Tj = -55℃ 至 +125℃（宽温区可靠工作）
三、结构与封装
- 封装形式：SMA (DO-214AC)，适合自动化贴装与回流焊工艺。
- 塑料外壳满足 UL 94V-0 阻燃等级，安全可靠。
- 设计含保护环（guard ring）以增强对过压和表面击穿的耐受能力。
- 保证高温焊接性：引脚承受 250℃，10 秒回流条件，便于标准焊接流程。
四、性能特色
- 低正向电压降和高电流容量，减少开关与整流损耗，提高效率。
- 大浪涌电流能力，能承受启动或短时负载突增。
- 由于肖特基结的多数载流子输运，开关速度快，适合高频开关场合。
- 可靠性优异，工作温度范围宽，适应工业级环境。
五、典型应用
- 低压、高频逆变器与开关电源（DC-DC、SMPS）整流与回流二极管。
- 电机驱动与续流保护（freewheeling diode）。
- 电源极性反接保护与防护电路（polarity protection）。
- 电池充放电管理、汽车电子（在符合电压范围内）、通信与消费类电子供电模块。
六、PCB 与焊接建议
- 为降低结温并提升平均载流能力，建议在焊盘下方和周围提供适量铜箔散热面积，并通过热铜过孔与内层散热连接。
- 遵循推荐回流曲线，最大焊接温度与时长不超过 250℃/10s；避免长时间在高温下暴露以保护封装与内部结构。
- 对于高浪涌或高均热需求，可在焊盘两侧增加等高焊盘以改善热传导。
七、可靠性与选型建议
- 在接近最大反向电压（40V）工作时需注意反向漏流会增加，若系统要求更低漏电建议提升耐压裕量或选择更高Vr规格。
- 设计时建议留有热裕量，若长时间在3A附近工作，应评估散热路径与结温，避免长期高温影响寿命。
- 若应用涉及更高反向耐压或更低漏电要求，可考虑同系列不同型号或其它封装形式。
UMW SS34A 以其低 Vf、3A 的连续整流能力和良好的封装热管理，适合多种中低压高频电源及保护类应用，是一个在效率与成本之间具有良好平衡的选择。若需详细的电气特性曲线和封装尺寸图，请联系供应商获取完整数据手册。
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