WMSIC Electronic Components

UMW PESD3V3L1UB

ModelPESD3V3L1UB
PackageSOD-523
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 PESD3V3L1UB
Type
UMW
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
UMW
Electronic Component
PESD3V3L1UB
Electronic Component
1
Package
SOD-523
Electronic Component
Electronic Component
Type
ESD
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.029g
Electronic Component
1
Channel Count
Electronic Component
Cj- Capacitor
34pF
Electronic Component
BM0264254900
Voltage
11V
Electronic Component
IEC 61000-4-2
Current(Ir)
100uA

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

PESD3V3L1UB 静电/浪涌保护器件产品概述

一、产品定位与核心价值

PESD3V3L1UB是友台半导体(UMW)推出的单通道单向ESD/TVS防护器件,专为3.3V低电压电子系统设计,核心功能是抑制静电放电(ESD)和瞬态浪涌对敏感电路的破坏。该器件平衡了防护能力与电路兼容性,体积小巧(SOD-523封装),适合小型化、低功耗的消费电子及工业控制场景,可有效避免核心器件因静电/浪涌导致的逻辑错误或永久损坏。

二、关键电气参数深度解析

1. 防护能力核心指标

  • 峰值脉冲电流(Ipp):4.5A@8/20us
    8/20us是国际通用的浪涌电流波形标准(上升时间8us,半峰值时间20us),该参数表明器件可承受最大4.5A的瞬态浪涌电流,覆盖手机、键盘等常见接口的静电/浪涌能量范围。
  • 峰值脉冲功率(Ppp):45W@8/20us
    对应浪涌功率的极限值,与Ipp配合可确保单次浪涌冲击下器件不失效,满足长期防护需求。
  • 钳位电压(Vc):11V
    当浪涌电流流过时,器件会将两端电压钳位在11V以下——远低于多数3.3V器件的IO口损坏阈值(通常20V左右),有效避免后级电路过压击穿。
  • 击穿电压(Vbr):5.6V
    器件反向击穿的典型值,略高于系统工作电压(3.3V),确保正常工作时不导通(不干扰电路),浪涌时快速击穿导通(泄放能量)。

2. 直流与射频特性

  • 反向截止电压(Vrwm):3.3V
    器件反向偏置下不导通的最大电压,需与系统工作电压匹配(系统电压≤3.3V),避免长期导通导致功耗异常。
  • 反向漏电流(Ir):100uA
    反向截止时的漏电流极小,不会增加系统功耗,也不会干扰低功耗电路(如智能穿戴)的正常工作。
  • 结电容(Cj):34pF
    寄生电容对信号完整性的影响需结合场景:
    • 低速信号(UART、SPI、音频):可忽略;
    • 中高频信号(蓝牙、WiFi):需评估(若需更优兼容性,可选择低结电容型号)。

3. 标准符合性

满足IEC 61000-4-2静电放电标准,覆盖接触放电(±8kV)和空气放电(±15kV)的常见应用场景,符合国际电磁兼容(EMC)要求。

三、封装与可靠性设计

1. SOD-523封装特点

  • 超小型尺寸:约1.6mm×0.8mm×0.6mm,引脚间距0.65mm,适配高密度PCB设计(如智能手表、蓝牙耳机);
  • 表面贴装:支持自动化贴装,生产效率高,降低人工成本。

2. 可靠性优势

  • 多次防护能力:可重复承受静电冲击无性能衰减,满足长期使用需求(如经常插拔的USB接口);
  • 温度稳定性:支持工业级温度范围(-55℃~125℃),适应户外设备、车载电子等恶劣环境。

四、典型应用场景

  1. 低电压数字电路防护:3.3V MCU、FPGA、DSP等核心器件的IO口防护;
  2. 便携式设备接口:手机、平板、智能手表的USB、耳机孔、充电口防护;
  3. 消费电子外设:键盘、鼠标、充电器、蓝牙音箱的接口防护;
  4. 低速通信总线:UART、SPI、I2C等总线的浪涌抑制。

五、选型与使用注意事项

  1. 极性匹配:单向极性,需确认引脚方向(SOD-523封装通常引脚1为阴极、引脚2为阳极),反向安装会导致防护失效;
  2. 电压匹配:仅适用于工作电压≤3.3V的系统,5V系统需选择Vrwm≥5V的型号(如PESD5V0L1UB);
  3. 高频场景优化:若用于100MHz以上信号,可并联0.1uF陶瓷电容降低信号失真;
  4. 安装位置:尽量靠近被防护器件引脚,减少引线长度(引线电感会升高浪涌电压尖峰)。

PESD3V3L1UB凭借紧凑封装、可靠防护能力,成为3.3V低电压系统静电/浪涌防护的高性价比选择,广泛适配消费电子、工业控制等领域的小型化设计需求。

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