WMSIC Electronic Components

CJ CESD12VAP

ModelCESD12VAP
PackageSOT-23
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
CJ CESD12VAP
Type
CJ
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJ
Electronic Component
CESD12VAP
Electronic Component
1
Package
SOT-23
Electronic Component
Electronic Component
Type
ESD
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.036g
Electronic Component
1
Channel Count
Electronic Component
Cj- Capacitor
45pF
Electronic Component
BM0227310093
Voltage
24V
Electronic Component
IEC 61000-4-2
Current(Ir)
1uA

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

CESD12VAP 12V SOT-23 TVS 二极管 产品概述

一、产品简介

CESD12VAP 是 CJ(江苏长电/长晶)推出的一款单路、单向瞬态电压抑制(TVS)二极管,采用常用的 SOT-23 封装,专为对 12V 工况下的瞬态浪涌与静电放电(ESD)提供可靠保护而设计。器件兼顾高能量吸收能力与小尺寸装配,适用于工业与消费电子的接口与电源防护场合。

二、主要电气参数

  • 极性:单向(Unidirectional)
  • 反向截止电压 Vrwm:12 V(适合 12V 系统守恒电压)
  • 击穿电压(典型):13.3 V
  • 钳位电压 Vc(在指定脉冲下):约 24 V
  • 峰值脉冲电流 Ipp:9 A
  • 峰值脉冲功率 Ppp:220 W(8/20 μs 波形)
  • 反向电流 Ir:≤ 1 μA(在 Vrwm 下的泄漏较低)
  • 结电容 Cj:45 pF(影响高频信号完整性)
  • 通道数:单路
  • 抗扰等级:符合 IEC 61000-4-2 ESD 要求(用于静电放电保护)
  • 封装:SOT-23

三、关键特性与优势

  • 高能量吸收能力:220 W(8/20 μs)峰值功率,可在规定波形下承受较强浪涌,适合经常遭受瞬态冲击的电源与接口线路。
  • 低钳位电压:在 9 A 脉冲下钳位约 24 V,可有效限制被保护节点上的过压,减少下游元件的应力。
  • 低漏电流:典型 1 μA 的低反向电流,适合对静态功耗敏感的系统。
  • 紧凑封装:SOT-23 便于自动贴装与空间受限的应用。
  • 中等结电容:45 pF,对信号线会产生一定影响,适合电源与低速信号线保护,对高速接口需评估匹配性。
  • 符合 IEC 61000-4-2:可用于满足常见的静电放电防护规范。

四、典型应用场景

  • 12V 工作电源总线保护(如车载周边 12V 辅助电源、工业 12V 控制模块)——(注意:若用于车规场合需确认厂家是否有 AEC 认证)
  • 电源输入防护:适配器、充电器的输入端瞬态浪涌抑制
  • 通用 I/O 与控制信号保护:低速数据线、电平控制线的静电与浪涌防护
  • 工业与消费电子设备:路由器、电源模块、家电控制板、仪表等需防护瞬态冲击的场合

五、设计与布板建议

  • 靠近被保护引脚布置:将 CESD12VAP 尽量靠近需保护的引脚或连接器焊盘,缩短走线以减小寄生电感和环路面积。
  • 最小化串联阻抗:保证钳位动作时的路径阻抗尽可能小,以提高能量吸收效率。
  • 与滤波器配合:若保护高速信号或需更低串扰,可搭配串联电阻或差分滤波网络以改善带宽与稳定性。
  • 热与重复脉冲考量:220 W(8/20 μs)为单次脉冲能力,若存在重复或连续脉冲,应参考厂家负载循环与热阻参数并考虑并联或选用更大能量级产品。
  • 核实封装引脚配置与焊接工艺:生产前参考原厂数据表确认引脚定义、封装尺寸与回流焊工艺参数。

六、选型与注意事项

  • 工作电压匹配:Vrwm = 12 V 适合稳压在 12 V 左右的电源线;若系统工作电压高于 12 V,应选用更高 Vrwm 的器件。
  • 信号完整性要求:45 pF 的结电容对高频或差分高速接口(如 USB3.0、HDMI 等)可能造成明显影响,选型时需以电路带宽为准。
  • 认证与可靠性:在对车规、医疗等严格认证有要求的项目中,应向供应商确认器件是否具备相应合规证书(如 AEC-Q、UL 等)。
  • 极限工况:避免频繁超过器件的峰值脉冲参数,必要时采用多级防护或更高能量等级的 TVS。

七、品牌与包装

品牌:CJ(江苏长电/长晶)
封装:SOT-23,适配常见 SMT 生产线。
在批量应用前,建议索取原厂数据手册以获取更完整的电气特性、典型特性曲线、封装和焊接指南,并进行样机验证。

总结:CESD12VAP 在 12V 系统中提供了一种小封装、高能量吸收的防护解决方案,适合用于电源线与一般 I/O 的 ESD/浪涌防护。选型时应权衡工作电压、结电容对信号的影响以及实际脉冲能量需求。

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