WMSIC Electronic Components

Jingdao Microelectronics SMF14A

ModelSMF14A
PackageSOD-123FL
BrandElectronic
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 Option 131498

Available for RFQ

Technical data

Product details

13 specifications

Core information

Product name
Electronic SMF14A
Type
Jingdao Microelectronics
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
SMF14A
Electronic Component
1
Package
SOD-123FL
Electronic Component
0.03g
Electronic Component
1
Electronic Component
BM0265794251
Electronic Component
Electronic Component
Electronic Component
3000

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

晶导微电子SMF14A TVS二极管产品概述

SMF14A是晶导微电子推出的单向瞬态抑制二极管(TVS),采用SOD-123FL小型表面贴装封装,专为电子电路中的静电放电(ESD)、浪涌过压防护设计,具备宽温适用、低漏电流、高脉冲耐受能力等特点,可满足消费电子、工业控制、通信设备等领域的防护需求。

一、产品基本信息

  • 型号标识:SMF14A中,“SMF”代表SOD-123封装系列,“14”对应反向截止电压(Vrwm)14V,“A”表示单向防护(正向导通、反向截止实现过压防护);
  • 品牌与封装:晶导微电子出品,采用SOD-123FL封装(表面贴装、无引脚设计),尺寸紧凑,适配高密度PCB布局;
  • 核心定位:针对MCU、传感器、接口IC等敏感元件的瞬态过压防护,替代传统压敏电阻,实现更快速响应与精准电压钳位。

二、核心电气参数详解

SMF14A的电气参数经过严格测试,关键指标直接决定防护能力:

  1. 反向截止电压(Vrwm):14V
    器件正常工作时反向可承受的最大直流电压(无击穿),需与电路工作电压匹配(如电源电压≤14V场景适用),静态下不漏电、不影响电路功能。

  2. 击穿电压(Vbr):15.6V(@Ir=1uA)
    反向漏电流达1uA时的电压阈值,是器件进入击穿状态的标志;与Vrwm形成1.6V裕量,避免电路正常波动触发误击穿。

  3. 钳位电压(Vc):23.2V(@Ipp=8.6A)
    峰值脉冲电流(8.6A)下的最大电压值,是防护核心指标——若后端IC耐受电压≥23.2V,可有效避免过压损坏。

  4. 峰值脉冲功率(Ppp):200W
    单次10/1000μs标准脉冲下可承受的最大功率,结合Ipp=8.6A,满足多数工业/消费场景的浪涌防护需求(如雷击、静电放电)。

  5. 反向漏电流(Ir):1uA(@Vrwm=14V)
    静态漏电流极小,不会导致电路功耗增加或信号失真,适合低功耗设备(如便携式设备、传感器模块)。

  6. 工作温度范围:-55℃~+150℃
    宽温设计覆盖工业级(-40℃~+85℃)、汽车部分场景(引擎舱周边),适应高低温恶劣环境。

三、封装与典型应用

3.1 封装特性

SOD-123FL封装为小型表面贴装形式,尺寸约1.6mm×0.8mm×0.5mm(典型值),具备:

  • 适配自动贴装生产线,生产效率高;
  • 无引脚设计减少寄生电感,提升响应速度;
  • 抗机械应力能力强,适合振动环境(如车载电子)。

3.2 典型应用场景

  • 消费电子:手机、平板的USB/HDMI接口,防护8kV接触放电(IEC 61000-4-2 Level 4);
  • 工业控制:PLC模块、传感器节点的电源端,防护2kV雷击浪涌(IEC 61000-4-5);
  • 通信设备:路由器以太网接口、射频前端,防止瞬态过压损坏收发器;
  • 汽车电子:车载显示屏、充电器辅助电源端,适应-40℃~+85℃车载环境。

四、性能优势与设计亮点

  1. 快速响应:TVS响应时间为皮秒级(ps),远快于压敏电阻(微秒级),瞬间抑制静电尖峰;
  2. 精准钳位:钳位电压与击穿电压差值(7.6V)合理,既保证防护,又避免过度钳位影响电路;
  3. 低功耗兼容:1μA漏电流适配电池供电设备,不增加功耗;
  4. 宽温可靠性:-55℃~+150℃覆盖多数应用场景;
  5. 高密度布局:小型封装节省PCB空间,适合智能穿戴、IoT设备。

五、质量与可靠性

晶导微电子SMF14A符合:

  • 静电防护:IEC 61000-4-2、EN 61000-4-2;
  • 浪涌防护:IEC 61000-4-5;
  • 可靠性测试:高温存储、温度循环、振动测试,确保批量一致性。

综上,SMF14A是性能均衡的单向TVS二极管,可有效解决电路瞬态过压问题,适配多领域防护需求,是工程师设计的可靠选择。

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