WMSIC Electronic Components

TWGMC SMCJ30CA Bidirectional TVS Diode SMCJ30CA

ModelSMCJ30CA
PackageSMC(DO-214AB)
BrandTWGMC
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
TWGMC SMCJ30CA
Type
TWGMC
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TWGMC
Electronic Component
SMCJ30CA
Electronic Component
1
Package
SMC(DO-214AB)
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.37g
Electronic Component
1
Channel Count
Electronic Component
Electronic Component
BM0265826643
Operating Temperature
55℃~+150℃
Voltage
48.4V
Current(Ir)
1uA
Voltage(VBR)
36.8V

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

SMCJ30CA瞬态抑制二极管(TVS)产品概述

SMCJ30CA是台湾迪嘉(TWGMC)推出的双向瞬态抑制二极管(TVS),采用SMC(DO-214AB)贴片封装,核心定位为电路瞬态过压防护器件,可有效抑制雷电感应、静电放电(ESD)、电源浪涌等瞬态干扰,保护敏感电子元器件免受损坏。

一、产品核心定位与典型应用场景

SMCJ30CA兼顾宽温适应性与高脉冲耐受能力,主要面向对可靠性要求较高的领域:

  • 汽车电子:车载传感器(胎压监测、温度传感器)、CAN/LIN总线接口、车载电源模块的过压保护,适配汽车-55℃~125℃的工作环境(部分场景延伸至150℃);
  • 工业控制:PLC输入输出端口、RS485/Modbus现场总线、电机驱动电路的浪涌防护,应对工业现场雷击、负载切换瞬态;
  • 通信设备:基站射频接口、路由器/交换机端口的ESD与浪涌保护,提升设备抗干扰能力;
  • 消费电子:充电器、电源适配器输出端、智能家电控制板的过压防护,防止意外浪涌损坏终端设备。

二、关键参数解析与性能优势

SMCJ30CA的参数设计围绕“低漏电流、高脉冲耐受、宽温稳定”展开,核心参数解析如下:

1. 电压防护参数:精准钳位不影响正常电路

  • 反向截止电压(Vrwm=30V):电路正常工作时,TVS处于截止状态,漏电流≤1μA,不干扰电路运行;
  • 击穿电压(Vbr=36.8V):当瞬态电压超过30V时,TVS快速击穿导通,将电压钳位在安全范围;
  • 钳位电压(Vc=48.4V@Ipp=31A):在31A峰值脉冲冲击下,TVS两端最高电压仅48.4V,远低于多数敏感器件(如MCU、传感器)的耐压极限,确保后级电路安全。

2. 脉冲耐受能力:应对强瞬态干扰

  • 峰值脉冲电流(Ipp=31A):可承受单次峰值31A的瞬态电流冲击;
  • 峰值脉冲功率(Ppp=1.5kW@10/1000μs):适配国际标准10/1000μs浪涌波形(前沿10μs、半峰值1000μs),有效抑制雷击、电源切换等典型浪涌;
  • 双向极性:无需区分正负极,安装时无需考虑电路极性,简化设计与生产流程。

3. 环境与可靠性参数:宽温稳定运行

  • 工作温度范围(-55℃~+150℃):覆盖工业级、汽车级环境温度要求,极端高低温场景下性能稳定;
  • 反向漏电流(Ir=1μA):低漏电流设计,减少电路功耗,适合低功耗应用场景。

三、封装与可靠性设计

SMCJ30CA采用SMC(DO-214AB)贴片封装,具备以下优势:

  • 体积紧凑:封装尺寸约2.54mm×5.08mm×1.27mm,适合高密度PCB布局,节省电路板空间;
  • 焊接可靠:符合回流焊、波峰焊工艺要求(焊接温度上限260℃,时间≤30s),适配自动化贴装产线;
  • 品牌保障:TWGMC(台湾迪嘉)是专业保护器件厂商,产品符合RoHS、REACH环保标准,可靠性通过温度循环、湿度老化等测试验证。

四、使用注意事项

为确保保护效果与长期可靠性,需注意以下要点:

  1. 选型匹配:电路正常工作电压需≤30V(Vrwm),后级器件耐压需≥48.4V(钳位电压),避免TVS长期导通或保护失效;
  2. 布局优化:TVS需靠近被保护器件(如MCU引脚),引线长度≤1cm,降低引线电感导致的电压尖峰;
  3. 焊接工艺:避免焊接温度过高/时间过长,防止封装内部损伤;
  4. 散热考虑:频繁承受大脉冲时,可在焊盘下增加散热铜皮,提升散热能力,延长器件寿命。

SMCJ30CA凭借双向防护、宽温稳定、高脉冲耐受等优势,成为工业、汽车、通信领域过压保护的高性价比选择,可有效提升电子设备的抗干扰能力与可靠性。

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