WMSIC Electronic Components

CJ CJSMAJ18CA

ModelCJSMAJ18CA
PackageSMAG
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 CJSMAJ18CA
Type
CJ
Minimum package
5000 卷

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJ
Electronic Component
CJSMAJ18CA
Electronic Component
1
Package
SMAG
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.104g
Electronic Component
1
Electronic Component
BM0265022353
Voltage
28.9V
Current(Ir)
5uA
Voltage(VBR)
22.08V
Electronic Component
Electronic Component
Electronic Component
5000

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

CJSMAJ18CA TVS二极管产品概述

一、产品基本信息

CJSMAJ18CA是江苏长电科技(CJ) 推出的一款双向瞬态电压抑制器(TVS),属于SMAJ系列表面贴装防护器件。作为电子系统的核心过压保护元件,该产品主要用于抑制雷电、静电放电(ESD)、电源浪涌等瞬态干扰,避免后端敏感元器件(如MCU、传感器、通信芯片)因过压损坏。其双向导通特性可同时应对正负方向的浪涌脉冲,防护场景更全面。

二、核心电性能参数解析

该产品的关键参数精准匹配TVS防护需求,核心指标如下:

  1. 反向截止电压(Vrwm):18V
    指器件反向偏置下不导通的最大直流电压,系统常态工作电压(如3.3V、5V、12V)需低于此值,确保TVS在正常状态下不影响电路运行。
  2. 钳位电压(Vc):28.9V(测试条件:10/1000μs脉冲)
    瞬态浪涌到来时,TVS快速导通并将电压钳位至该值,是保护后端器件的核心指标——钳位电压越低,对敏感元件的防护效果越强。
  3. 峰值脉冲电流(Ipp):13.7A(测试条件:10/1000μs脉冲,Ppp=400W)
    模拟雷电、静电等常见浪涌的10/1000μs波形下,器件能承受的最大峰值电流,可覆盖多数消费电子的防护需求。
  4. 峰值脉冲功率(Ppp):400W(测试条件:10/1000μs脉冲)
    单次脉冲耐受的最大功率,400W容量可应对多次浪涌冲击,提升系统抗干扰能力。
  5. 击穿电压(Vbr):22.08V(典型值)
    反向偏置下开始导通的电压,介于Vrwm(18V)和Vc(28.9V)之间,确保浪涌到来时快速响应。
  6. 反向漏电流(Ir):5μA(测试条件:Vrwm下)
    常态下反向漏电流极小,对系统功耗无明显影响,避免额外能量损耗。

三、封装与物理特性

CJSMAJ18CA采用SMAG封装,对应行业标准DO-214AC(SMA)表面贴装封装,具备以下优势:

  • 体积小巧:尺寸约3.0mm×2.5mm×1.5mm,适配高密度PCB布局,满足小型化电子设备的集成需求;
  • 自动化兼容:表面贴装工艺可对接自动化生产线,提升生产效率、降低人工成本;
  • 可靠性强:玻璃钝化封装增强抗潮湿、抗机械应力能力,延长器件使用寿命。

四、典型应用场景

该产品凭借双向防护、低钳位电压等特性,广泛应用于以下领域:

  1. 通信设备:路由器、交换机、光模块的电源/以太网接口防护,抑制雷电感应浪涌;
  2. 消费电子:智能手机、平板、笔记本的充电端口、USB/耳机接口防护,应对ESD和电源浪涌;
  3. 工业控制:PLC、传感器、伺服驱动器的信号线路防护,避免工业电磁干扰(EMI);
  4. 电源系统:开关电源、电池充电电路的输出端防护,防止负载突变损坏电源模块;
  5. 车载辅助电路:车载音响、GPS模块的非汽车级防护(若需汽车级需确认AEC-Q101认证)。

五、产品优势总结

CJSMAJ18CA在同类产品中具备明显竞争力:

  1. 双向防护无死角:无需搭配反向器件,简化电路设计,覆盖正负浪涌;
  2. 快速响应低损耗:响应时间<1ns,结合28.9V低钳位电压,瞬间抑制浪涌;
  3. 高可靠性低成本:长电品牌工艺保障稳定性,国产产能稳定,性价比突出;
  4. 低功耗易集成:5μA漏电流不影响系统,小型封装适配各类PCB布局。

综上,CJSMAJ18CA是一款性能均衡、应用广泛的双向TVS二极管,可有效解决消费电子、通信、工业等领域的瞬态过压防护问题,是系统防护的理想选择。

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