WMSIC Electronic Components

UMW SR05

ModelSR05
PackageSOT-143
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 SR05
Type
UMW
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
UMW
Electronic Component
SR05
Electronic Component
1
Package
SOT-143
Electronic Component
Electronic Component
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.04g
Electronic Component
1
Cj- Capacitor
0.3pF
Electronic Component
BM0229956519
Operating Temperature
55℃~+125℃
Voltage
25V
Electronic Component
IEC 61000-4-5
Current(Ir)
100nA
Voltage(VBR)
6V

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

SR05 产品概述

一、产品简介

SR05 是友台半导体(UMW)推出的一款单向瞬态电压抑制(TVS)二极管,专为 5V 工况的电路板浪涌保护而设计。器件采用 SOT-143 小体积封装,工作温度范围宽(-55℃ 至 +125℃),可以在有限空间内为敏感接口提供快速、可靠的过压防护,满足 IEC 61000-4-5 的浪涌抗扰度要求。

二、主要技术参数

  • 钳位电压(Vclamp):25V(在指定脉冲条件下)
  • 反向工作电压(Vrwm):5V
  • 击穿电压(Vbr):6V
  • 峰值脉冲电流(Ipp):6A
  • 结电容(Cj):0.3pF(典型)
  • 反向电流(Ir):100nA(常温下)
  • 极性:单向
  • 工作温度:-55℃ ~ +125℃
  • 防护等级:符合 IEC 61000-4-5 浪涌测试标准
  • 封装:SOT-143

三、器件特性与优势

  1. 响应速度快:作为 TVS 器件,SR05 对快速上升的瞬态脉冲能在纳秒级响应,从而有效钳制高幅值电压。
  2. 低结电容:0.3pF 的典型结电容使其对高速数据信号影响极小,适合 USB、串行总线等高速接口保护。
  3. 低漏电流:100nA 的反向泄漏保证在常态工作下不影响电路偏置与功耗控制。
  4. 宽温度范围与工业级可靠性,适合车载、工业控制及室外设备等苛刻环境。

四、典型应用场景

  • 5V 电源线、上拉总线的浪涌保护
  • USB/ETHERNET/串口接口及摄像头、传感器等外设的数据线防护
  • 工业控制、楼宇自控、车载电子中需要满足 IEC 61000-4-5 浪涌要求的场合
  • 小体积 PCB 设计、便携设备以及对结电容敏感的高速信号路径

五、封装与热管理

SOT-143 小封装便于高密度布局,但对热耗散能力有限。在频繁或高能量浪涌环境下,建议在器件周围保持适当铜箔面积以利散热;必要时在 PCB 顶层与底层增加过孔连接,以增强导热与提升可靠性。

六、设计与使用建议

  • 将 SR05 靠近需保护的输入/输出接口焊接,以缩短响应路径并减小寄生感抗。
  • 对于差分或双向信号,应选择对应的双向或对称 TVS 器件,SR05 为单向器件,不宜用于双向信号线。
  • 在需要严格控制总线阻抗或信号完整性的高速链路上,注意并联 TVS 的结电容对回路的影响,0.3pF 属较低影响级别。
  • 评估实际浪涌能量时,考虑系统中可能出现的多次脉冲与脉冲宽度,以选择合适的 Ipp 余量或并联多颗器件实现更高能量承受能力。

七、采购与注意事项

型号示例:UMW SR05,封装 SOT-143。订购时请确认所需极性(单向)与工作电压等级(Vrwm=5V)匹配应用要求。出货前建议参考厂方完整数据手册,核对钳位电压测试条件、热阻参数及可靠性试验报告,以确保器件在目标系统中的长期稳定性。

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