WMSIC Electronic Components

DOWO SMCJ30A

ModelSMCJ30A
PackageSMC(DO-214AB)
BrandDOWO
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
DOWO SMCJ30A
Type
DOWO
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
SMCJ30A
Electronic Component
1
Package
SMC(DO-214AB)
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.372g
Electronic Component
1
Electronic Component
BM0264215323
Operating Temperature
55℃~+150℃
Voltage
48.4V
Electronic Component
IEC 61000-4-2
Current(Ir)
1uA
Voltage(VBR)
33.3V

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

SMCJ30A 单向瞬态抑制二极管(TVS)产品概述

一、产品定位与核心价值

SMCJ30A是东沃电子(DOWO)推出的单向瞬态抑制二极管(TVS),采用SMC(DO-214AB)表面贴装封装,专为电子系统的瞬态过压防护设计。其核心作用是:当电路遭遇雷击浪涌、电源尖峰、静电放电(ESD)等瞬态干扰时,快速导通并吸收能量,将电压钳位在后端敏感器件(如MCU、传感器、IC)的安全阈值内,避免器件击穿或损坏,大幅提升设备可靠性与使用寿命。

二、核心电性能参数详解

SMCJ30A的电性能参数精准匹配多场景防护需求,关键参数解读如下:

1. 反向截止电压(Vrwm):30V

指器件正常工作状态下可承受的最大反向直流电压。当反向电压≤30V时,器件处于截止态,漏电流极小,不影响电路正常运行(如电源回路、信号传输)。

2. 击穿电压(Vbr):33.3V

反向电压超过此值时,器件由截止态快速转为导通态,是TVS启动防护的临界触发电压,确保过压初期即可响应,避免防护延迟。

3. 钳位电压(Vc):48.4V

在额定峰值脉冲电流下,器件两端的最大电压值(即防护后的输出电压)。该参数直接决定后端器件的安全边界——SMCJ30A可将过压稳定钳位在48.4V以内,有效保护敏感元件不被击穿。

4. 峰值脉冲电流(Ipp):30.99A

器件可承受的最大脉冲电流峰值,结合1.5kW峰值功率,能高效吸收高强度瞬态浪涌(如雷击、电机启停尖峰)。

5. 峰值脉冲功率(Ppp):1.5kW@10/1000μs

以国际标准10/1000μs脉冲波形(上升时间10μs、半峰值时间1000μs)测试的峰值功率,1.5kW的功率容量覆盖多数工业/汽车场景的浪涌强度。

6. 反向漏电流(Ir):1μA

正常反向电压(30V)下的漏电流仅1μA,远低于常规电路允许的泄漏电流,不会对系统功耗或信号完整性造成影响。

三、封装与可靠性设计

SMCJ30A采用SMC(DO-214AB)表面贴装封装,兼具紧凑性与可靠性:

  • 尺寸紧凑:封装尺寸约3.0mm×2.8mm×1.6mm,适配高密度PCB设计(如小型化工业模块、消费电子);
  • 贴装便捷:符合SMT自动化生产要求,兼容常规回流焊工艺(焊接温度≤260℃,持续时间≤30s);
  • 散热优异:采用高导热封装材料,可快速散发热量,避免浪涌能量积累导致器件过热失效;
  • 无铅环保:支持RoHS/REACH标准,焊接后无虚焊、脱落风险,长期稳定性符合电子元器件可靠性规范。

四、环境适应性与标准符合性

SMCJ30A具备强环境兼容性,满足多领域应用要求:

1. 宽温工作范围:-55℃~+150℃

覆盖工业级(-40℃+85℃)、汽车级(-40℃+125℃)甚至极端户外环境(如光伏逆变器、充电桩)的温度需求;

2. 防护标准:IEC 61000-4-2

符合静电放电(ESD)防护标准,可抵御接触放电8kV、空气放电15kV等常见静电冲击;

3. 行业标准兼容

适配GB/T 14023-2006(车辆电子EMC)、IEC 61000-4-5(浪涌抗扰度)等标准,可直接用于汽车、工业、通信等领域。

五、典型应用场景

SMCJ30A因性能均衡、封装紧凑,广泛应用于以下场景:

  1. 工业控制:PLC输入输出端口、传感器模块、伺服驱动器的过压防护,抵御雷击、电机启停浪涌;
  2. 汽车电子:车载ECU、显示屏、CAN总线节点的防护,应对点火浪涌、静电干扰;
  3. 通信设备:路由器、交换机、光模块的以太网端口、电源接口防护,抵御雷电浪涌;
  4. 消费电子:手机充电端口、平板接口、蓝牙耳机的静电防护,提升用户使用安全性;
  5. 新能源:充电桩控制板、光伏逆变器辅助电路防护,应对电网波动过压。

SMCJ30A凭借高性价比、宽适配性,成为多领域电子设备瞬态防护的核心器件,有效降低系统故障风险,延长设备使用寿命。

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