WMSIC Electronic Components

CJ ESDBT4V5D3

ModelESDBT4V5D3
PackageSOD-323
BrandCJ
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
CJ ESDBT4V5D3
Type
CJ
Minimum package
3000 编带

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJ
Electronic Component
ESDBT4V5D3
Electronic Component
1
Package
SOD-323
Electronic Component
Electronic Component
Type
ESD
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.081g
Electronic Component
1
Cj- Capacitor
150pF
Electronic Component
BM0257713211
Voltage
27.5V
Electronic Component
IEC 61000-4-5;IEC 61000-4-2
Current(Ir)
1uA
Electronic Component
Electronic Component

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

ESDBT4V5D3 产品概述

ESDBT4V5D3 是 CJ(江苏长电/长晶)推出的双向静电放电(ESD)保护器件,采用紧凑的 SOD-323 封装,专为需要高抗冲击能力和低漏电的电子接口设计。该器件针对工业标准的静电冲击和浪涌保护要求进行了优化,具有快速响应、低漏电、可靠的钳位性能,适用于各种消费电子、通信和工业控制接口保护场合。

一、主要参数与特性

  • 极性:双向(Bidirectional),支持正负极性瞬态脉冲保护
  • 反向截止电压(Vrwm):4.5 V(工作反向电压)
  • 钳位电压(VC):27.5 V(典型钳位电压)
  • 峰值脉冲电流(Ipp):140 A @ 8/20 μs 波形
  • 峰值脉冲功率(Ppp):3.3 kW @ 8/20 μs
  • 反向电流(Ir):1 μA(在 Vrwm 下典型)
  • 结电容(Cj):150 pF(典型值)
  • 防护等级与标准:满足 IEC 61000-4-5(浪涌)和 IEC 61000-4-2(静电放电)测试规范
  • 封装:SOD-323(小外形、便于表面贴装)
  • 器件类型:ESD 静电保护二极管

二、功能与应用场景

ESDBT4V5D3 主要用于对敏感电子器件和接口进行瞬态过压、静电放电和浪涌保护。典型应用包括:

  • USB、串口、GPIO 等低速接口的防护
  • 电源轨和电源接口的浪涌吸收(尤其是 5 V 左右的工作电压场合)
  • 消费类电子产品(移动设备、家电、玩具)
  • 工业控制设备与传感器接口(需防雷击、浪涌与静电冲击的场合)
  • 通信设备与终端(对外接口的防护)

由于器件的结电容为 150 pF,适合于电源线或低速信号线保护;若用于高速差分信号(如 USB 2.0/USB3.0、LVDS 等),需评估电容对信号完整性的影响。

三、优势与设计要点

  • 快速响应:二极管型 ESD 器件在纳秒级别响应瞬态脉冲,能将高幅值瞬态电流导向地线或电源轨,保护后端电路。
  • 高脉冲承受能力:140 A@8/20 μs 的峰值脉冲电流能力和 3.3 kW 的峰值功率能力,使其在较强的浪涌或静电事件下保持稳定。
  • 低漏电:典型反向漏电仅 1 μA,有利于低功耗电路和待机系统。
  • 小尺寸封装:SOD-323 适用于 PCB 面积受限的消费电子与便携设备。
  • 符合 IEC 标准:通过 IEC 61000-4-2 和 IEC 61000-4-5 的防护验证,方便系统设计满足 EMC 要求。

设计时应注意:

  • 结电容较大:150 pF 在某些高速或高精度模拟线路中可能会引起信号畸变或加载效应,应在方案阶段验证。
  • 钳位电压:典型钳位值为 27.5 V,若被保护器件对瞬态耐压更敏感,需要评估是否满足保护需求。
  • 放置位置:为了获得最佳保护效果,应将器件尽可能靠近被保护的连接器或外部接口,且走线尽量短、粗并靠近地线。

四、布局与使用建议

  • 清晰接地路径:将器件的接地端直接与 PCB 地平面或参考地通过低阻路径连接,避免长引线增加环路电感。
  • 靠近保护点:将 ESDBT4V5D3 放置于受保护端口附近,例如连接器焊盘旁,第一时间钳制瞬态。
  • 避免串联大阻值:若在保护器与外部接口之间加入较大串联阻抗,会影响器件的钳位效率和能量吸收能力。
  • 多器件并用:在需要更高能量吸收或更低钳位电压的场合,可采用并联或与其他保护元件(如 TVS 阵列、慢熔断器)组合使用,但需注意均流与钳位配合。
  • 温度与可靠性:SOD-323 属于表面贴装微小封装,注意回流焊工艺与焊接温度对长期可靠性的影响。遵循厂家推荐的回流曲线。

五、典型选型理由与注意事项

当系统需要在 ± 极性瞬态、较高脉冲能量环境中进行可靠保护,并且对器件尺寸、漏电有较高要求时,ESDBT4V5D3 是合适的选择。适合保护 5 V 级别的电源线与低速信号线。选型时需重点确认:

  • 被保护线路对电容敏感程度(150 pF 的影响)
  • 系统允许的最大钳位电压是否高于被保护器件的承受值
  • 是否需要单向器件(仅限正向)或双向器件(本器件为双向)

如需样片或批量采购信息,可联系 CJ(江苏长电/长晶)授权分销商或代理获取详细数据手册(包括绝对最大额定值、典型波形、封装尺寸和焊接说明)。

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