WMSIC Electronic Components

FOSAN SS34

ModelSS34
PackageSMA
BrandFOSAN
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
FOSAN SS34
Type
FOSAN
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
FOSAN
Electronic Component
SS34
Electronic Component
1
Package
SMA
Electronic Component
Schottky Diode
Electronic Component
0.12g
Electronic Component
1
Electronic Component
BM0228561511
Current
3A
Diode
1
Current(Ir)
100uA@40V
(Vf)
550mV@3A
Electronic Component
65℃~+130℃
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.

SS34肖特基二极管产品概述

一、产品基本信息

SS34是由FOSAN(富信)推出的独立式肖特基整流二极管,采用SMA封装(对应DO-214AC贴片规格),属于中小功率低压器件范畴。该产品针对低功耗、快速开关场景优化,是电源电路、LED驱动等领域的常用基础元件,具备体积小、效率高、可靠性强的特点。

二、核心参数详解

SS34的关键参数直接决定其适用场景,核心指标及意义如下:

  1. 正向导通特性:正向压降(Vf)为550mV@3A——相比普通硅整流二极管(典型Vf≈700mV@1A),肖特基结构大幅降低导通损耗,3A负载下仅产生1.65W功耗,适合对效率敏感的设计;
  2. 反向阻断特性:直流反向耐压(Vr)为40V,反向电流(Ir)为100uA@40V——40V耐压满足大多数低压电源的反向保护需求,100uA漏电流处于合理范围,既保证截止性能,又避免漏电流影响效率;
  3. 电流耐受能力:平均整流电流(If)为3A,非重复峰值浪涌电流(Ifsm)为80A——3A平均电流覆盖中等功率负载(如12V电源下36W以内),80A浪涌能力可抵御开机/负载突变的冲击电流,提升电路可靠性;
  4. 温度适应范围:工作结温为**-65℃~+130℃**——宽温设计支持工业级、车载等极端环境,无需额外降额即可稳定工作。

三、封装与典型应用场景

SS34采用SMA贴片封装,具备以下优势:

  • 体积小巧(尺寸约2.7×1.7×1.0mm),适配高密度PCB设计;
  • 无引线结构,焊接可靠性高,兼容自动贴装生产线;
  • 引脚间距合理,散热性能满足3A电流下的结温控制。

典型应用场景包括:

  1. 开关电源/适配器:作为低压输出整流管(如5V/3A手机充电器),降低导通损耗,提升电源效率;
  2. LED驱动电路:用于低压LED串的反向保护或整流,配合恒流芯片实现高效驱动;
  3. 车载电子:适应-40℃~+85℃车载环境,用于车载充电器、仪表盘电源模块;
  4. 小型家电:机顶盒、路由器的电源整流,满足小体积、低功耗需求;
  5. 电池保护:防止电池反向放电,3A电流覆盖18650电池组等消费类电池应用。

四、关键性能优势

相比同类产品,SS34具备以下核心优势:

  1. 低功耗效率:550mV正向压降比同电流硅管低21%,减少电源发热,延长设备寿命;
  2. 快速开关速度:肖特基二极管无反向恢复时间,支持100kHz以上高频开关,避免开关损耗;
  3. 强浪涌耐受:80A非重复浪涌电流远高于多数同类3A肖特基(一般50~60A),抗冲击能力突出;
  4. 宽温可靠性:-65℃~+130℃结温覆盖工业级标准,极端环境下性能稳定;
  5. 成本效益:FOSAN品牌性价比优势,适合批量应用场景。

五、可靠性与应用注意事项

  1. 可靠性验证:产品通过高低温存储、温度循环、焊接可靠性测试,符合RoHS环保标准,满足工业级要求;
  2. 应用注意:
    • 实际工作电流建议降额至2.5A以内,避免长时间满负载;
    • 焊接温度控制:回流焊峰值≤260℃,时间≤10秒,防止封装损坏;
    • 散热设计:满负载时需增加PCB铜箔面积,确保结温不超过130℃。

总结

SS34作为高性价比低压肖特基二极管,凭借低导通损耗、强浪涌能力、宽温适应性和小体积封装,广泛适用于消费电子、车载、工业等领域的低压整流与保护场景,是中小功率电路设计的理想选择。

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