WMSIC Electronic Components

FOSAN SD103AW

ModelSD103AW
PackageSOD-123
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+

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Technical data

Product details

19 specifications

Core information

Product name
FOSAN SD103AW
Type
FOSAN
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
FOSAN
Electronic Component
SD103AW
Electronic Component
1
Package
SOD-123
Electronic Component
Schottky Diode
Electronic Component
0.032g
Electronic Component
1
Electronic Component
BM0264886318
Current
350mA
Diode
Electronic Component
Electronic Component
Electronic Component
Electronic Component
3000
Voltage Rating(Vr)
40V
Surge Current (Ifsm)
2A

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

SD103AW 肖特基二极管产品概述

一、产品基本属性

SD103AW是FOSAN(富信)半导体推出的独立式肖特基二极管,采用SOD-123小型贴片封装,定位于低压小电流场景的高效整流/续流器件。该型号以低功耗、快速开关为核心特点,适配消费电子、小型电源等轻量化设计需求。

二、核心电性能参数

以下参数明确了器件的应用边界,需结合实际电路条件选型:

  1. 正向压降(Vf):600mV(测试条件:正向电流If=0.2A)—— 远低于普通硅整流二极管(典型0.7V),导通损耗更低;
  2. 直流反向耐压(Vr):40V—— 反向偏置时的最大不击穿电压,限定高压应用场景;
  3. 整流电流(If):350mA—— 长期连续工作允许的最大正向电流,需结合散热条件使用;
  4. 非重复峰值浪涌电流(Ifsm):2A—— 单次瞬间(如电源启动)能承受的最大正向电流(持续时间ms级);
  5. 反向电流(Ir):注:通常肖特基二极管反向漏电流为微安级,此处若为2A可能为输入笔误,实际该型号典型漏电流约几μA@Vr=40V—— 反向偏置时的漏电流,直接影响静态功耗。

三、肖特基二极管的特性优势

作为金属-半导体结型器件,SD103AW具备以下核心优势:

  • 低功耗导通:600mV正向压降比硅管低14%以上,相同电流下导通损耗显著降低,适配电池供电场景;
  • 无反向恢复时间:无硅管的反向恢复过程(trr),开关速度达ns级,适配高频(几十kHz)开关电路;
  • 小型化封装:SOD-123封装尺寸约2.9mm×1.6mm×1.1mm,仅占用极小PCB面积,满足便携式设备轻量化需求;
  • 宽温可靠性:封装采用耐高温环氧树脂,工作温度范围通常为-55℃~125℃,符合工业级环境要求。

四、典型应用场景

结合电参数与特性,该型号主要适用于低压小电流、高频快速开关场景:

  1. 小型开关电源:如5V/0.3A手机充电器、蓝牙音箱电源的次级整流,利用低压降减少电源损耗;
  2. LED驱动电路:小功率LED串(3~5颗串联)的续流二极管,避免反向电压尖峰损坏LED;
  3. 消费电子信号保护:手机、平板音频/数据接口的瞬态电压钳位,快速响应瞬态干扰;
  4. 电池管理系统(BMS):锂电池充电回路续流、小电流放电保护,适配低功耗需求;
  5. 微型电机驱动:玩具电机、无人机舵机的驱动续流,快速关断避免反电动势损坏电路。

五、封装与使用注意事项

  1. SOD-123封装细节:引脚为阳极(A)、阴极(K),阴极端印有标识(如横线),焊接需注意极性;
  2. 使用限制:不得超过40V反向电压,连续电流≤350mA,浪涌电流(2A)为单次非重复,多次浪涌可能损坏器件;
  3. 散热建议:PCB焊盘尺寸建议≥1.2mm×1.2mm,避免局部过热(小电流下仍需保证基本散热)。

六、总结

SD103AW是一款针对低压小电流场景优化的肖特基二极管,凭借低正向压降、快速开关、小型化封装等优势,成为消费电子、小型电源、LED驱动等领域的高性价比选择。选型时需严格遵循参数边界,结合电路散热条件使用,以确保系统可靠性。

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