WMSIC Electronic Components

UMW BAS21

ModelBAS21
PackageSOT-23
BrandUMW
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
UMW BAS21
Type
UMW
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
UMW
Electronic Component
BAS21
Electronic Component
1
Package
SOT-23
Electronic Component
Switch Diode
Electronic Component
0.033g
Electronic Component
1
Electronic Component
BM0227694276
Current
200mA
Diode
1
Current(Ir)
100nA@200V
(Vf)
1.25V@200mA
Power Dissipation(Pd)
225mW
Electronic Component
Electronic Component
Electronic Component
3000

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

BAS21 开关二极管(UMW 友台,SOT-23)产品概述

一、产品简介

BAS21 为一款小型开关二极管,UMW(友台半导体)生产的 SOT-23 封装版本为“1 对共阳极”结构,适用于高压低功耗的快速开关场合。器件面向需要高反向耐压和较快回复特性的设计,常用于开关、整流、钳位与保护电路。

二、主要性能参数

  • 二极管配置:1 对共阳极(双二极管,共阳)
  • 正向压降 Vf:1.25 V @ 200 mA
  • 直流反向耐压 Vr:250 V
  • 连续整流电流 If:200 mA
  • 耗散功率 Pd:225 mW
  • 反向电流 Ir:100 nA @ 200 V
  • 反向恢复时间 Trr:50 ns
  • 非重复峰值浪涌电流 Ifsm:2.5 A
  • 封装:SOT-23

三、关键特性

  • 高耐压:250 V 额定反向耐压,适合高压边开关或钳位应用。
  • 快速恢复:50 ns 的反向恢复时间,适合中高频开关环境。
  • 低漏电:200 V 时反向漏电仅 100 nA,适用于高阻、低泄漏设计。
  • 小封装低功耗:SOT-23 与 225 mW 的功耗限制,适合电流与功耗受限的便携或密集 PCB 布局。

四、典型应用

  • 开关电源的高压侧快速整流与钳位
  • 反向保护、输入极限保护和浪涌钳位
  • 信号切换、逻辑等级保护与混合信号隔离场合
  • 占空比不高的整流与保护电路(注意总耗散限制)

五、封装与布局建议

  • SOT-23 小封装热阻较高,尽量在焊盘周围增加铜面积以改善散热。
  • 在高脉冲或连续 200 mA 工作时,注意器件温升与周边元件的热耦合。
  • 推荐采用标准 SOT-23 焊盘并遵循厂商的 PCB footprint,关键为增大散热铜箔并保证良好焊接。
  • 回流焊工艺请依照 J-STD-020 推荐曲线,避免超出峰值温度限制。

六、可靠性与使用注意

  • 最大连续功耗仅 225 mW,长期在接近极限条件下会缩短寿命,设计时留有裕量。
  • 峰值浪涌 Ifsm 2.5 A 为非重复值,尽量避免重复高能冲击。
  • 反向漏电随温度上升增加,温度敏感场合需留意热管理。
  • 储存与贴装按湿敏等级与厂商建议执行,避免潮湿环境导致焊接缺陷或可靠性下降。

七、订购与替代

  • 型号:BAS21(UMW/友台)SOT-23 双二极管,共阳极配置。
  • 在无法获得时,可考虑与相近电气参数的高压快恢复小信号二极管替代,但需对比 Vf、Vr、Trr、Pd 与封装一致性以保证系统性能。

如需我提供 PCB 焊盘参考尺寸、典型等效电路示意或与常见替代型号的对比表,我可以继续补充。

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