WMSIC Electronic Components

DOWO LRB521S-40T1G LRB521S

ModelLRB521S-40T1G
PackageSOD-523
BrandDOWO
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
DOWO LRB521S-40T1G
Type
DOWO
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
LRB521S-40T1G
Electronic Component
1
Package
SOD-523
Electronic Component
Schottky Diode
Electronic Component
0.025g
Electronic Component
1
Electronic Component
BM0230654941
Current
200mA
Diode
1
Current(Ir)
90uA@40V
(Vf)
540mV@200mA
Electronic Component
Electronic Component
Electronic Component
3000
Voltage Rating(Vr)
40V

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

LRB521S-40T1G 产品概述

一、概述

LRB521S-40T1G 是东沃(DOWO)出品的一款小功率肖特基整流二极管,采用 SOD-523 超小封装,适用于空间受限且要求低压降、高频整流的应用场景。器件标称直流整流电流为 200mA,直流反向耐压 40V,具备低正向压降与较低反向漏电的特性,适合便携设备、开关电源二次侧、信号整流与反向保护等低功耗电路。

二、电气性能要点

  • 正向压降(Vf):0.54V @ IF=200mA,低压降可减少导通损耗,提升电源效率。
  • 非重复峰值浪涌电流(Ifsm):1A,短时浪涌能力满足启动或瞬态冲击场景,但不适合长期大电流冲击。
  • 直流反向耐压(Vr):40V,适合 5V-24V 等低压系统的整流与保护。
  • 反向电流(Ir):90µA @ VR=40V,常温下反向漏电较低,有利于降低静态功耗。
  • 连续整流电流:200mA,适用于小电流功率路径或信号级整流。

三、封装与机械特性

SOD-523 超小型封装,有利于高密度 PCB 设计与微型化产品。推荐在 PCB 布局时注意焊盘尺寸与热阻路径,尽量将引脚铜箔连接到较大回流面以提升散热。该封装对手工焊接和回流温度有一定要求,建议按厂家回流曲线进行焊接工艺控制。

四、典型应用场景

  • 移动电源、便携式设备的次级整流与电源保护。
  • USB、充电器和适配器中低压电路的整流元件。
  • 反向电流保护和电源切换路径,防止电池回流。
  • 高频开关电源的同步或二次侧整流(小电流应用)。
  • 信号线路中的保护或整流用途。

五、使用建议与注意事项

  • 请根据工作环境温度对反向漏电进行预估,漏电随温度上升而增大,必要时留裕量或并联更高规格器件。
  • 尽量避免长期在接近额定电流的条件下工作,以延长器件寿命并降低热应力。
  • 在 PCB 设计中提供适当的铜箔和过孔散热路径,SOD-523 封装热阻较大,散热不足会影响电气性能与可靠性。
  • 回流焊工艺应遵循推荐曲线,避免过高峰温或长时间回流,防止封装与焊点应力损伤。
  • 若需更大浪涌能力或更高电流承载,请选用更大封装或更高额定电流的型号。

六、优势与局限

优势:正向压降低、体积小、适合高密度电路与低功耗设计、反向漏电较低。
局限:额定电流与浪涌能力有限,不适合中大功率场合;40V 反向耐压限制了在更高电压系统中的直接应用。

如需进一步的封装尺寸图、温度特性曲线或回流焊建议,请提供具体需求以便提供更详细的资料。

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