WMSIC Electronic Components

Jingdao Microelectronics SMCJ48A

ModelSMCJ48A
PackageSMC
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 26+

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Technical data

Product details

19 specifications

Core information

Product name
Electronic SMCJ48A
Type
Jingdao Microelectronics
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
SMCJ48A
Electronic Component
1
Package
SMC
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.381g
Electronic Component
1
Electronic Component
BM0265212100
Operating Temperature
55℃~+150℃
Voltage
77.4V
Current(Ir)
1uA
Voltage(VBR)
58.9V
Electronic Component
Electronic Component

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SMCJ48A TVS二极管产品概述

一、产品基本定位

SMCJ48A是晶导微电子推出的单向瞬态抑制二极管(TVS),采用SMC封装(DO-214AB),专为电路中的瞬态过压防护设计,可快速响应雷电浪涌、静电放电(ESD)、开关瞬态等干扰,保护后端敏感电子元件(如IC、传感器、通信模块等)免受损坏。

二、核心电气参数详解

SMCJ48A的关键参数围绕“防护能力”与“电路兼容性”设计,核心参数如下:

1. 电压防护特性

  • 反向截止电压(Vrwm):48V
    电路正常工作时,TVS反向可承受的最大电压上限,需匹配电路正常反向工作电压(需Vrwm≥电路工作电压,避免TVS误触发)。
  • 击穿电压(Vbr):58.9V
    反向电压超过此值时,TVS开始导通(进入击穿状态),是“防护启动”的关键阈值。
  • 钳位电压(Vc):77.4V
    在标准10/1000μs脉冲波形下,TVS能将过压峰值钳位到的最高电压,直接决定后端器件的安全上限(需Vc≤后端元件的耐压值)。

2. 脉冲耐受能力

  • 峰值脉冲功率(Ppp):1.5kW@10/1000μs
    可承受的单次最大脉冲功率,10/1000μs是模拟雷电或工业开关浪涌的标准波形,1.5kW功率覆盖多数常规浪涌场景。
  • 峰值脉冲电流(Ipp):19.4A@10/1000μs
    对应1.5kW功率下的脉冲电流峰值,反映TVS的电流承载能力。

3. 工作稳定性与环境适应性

  • 反向漏电流(Ir):1μA
    正常工作电压下的反向漏电流极小,不影响电路正常功能,避免功耗浪费。
  • 工作温度范围:-55℃~+150℃
    宽温范围覆盖工业、汽车等恶劣环境(如车载电子、户外传感器),满足高低温场景下的可靠性要求。

三、封装与可靠性设计

SMCJ48A采用SMC表面贴装封装(DO-214AB),具备以下优势:

  • 尺寸紧凑:封装尺寸约6.5×5.1×2.5mm,适合高密度PCB布局(如消费电子、小型通信设备);
  • 工艺兼容:支持回流焊、波峰焊等常规SMT工艺,生产效率高;
  • 长寿命可靠性:TVS固有特性为“无机械触点、反应速度ns级”,可承受多次脉冲冲击(典型>1000次8/20μs脉冲),性能稳定衰减。

四、典型应用场景

SMCJ48A因电压匹配与宽温特性,广泛应用于以下领域:

  1. 工业控制:PLC输入输出接口、传感器(温度/压力)、电机驱动电路的浪涌防护;
  2. 汽车电子:车载CAN/LIN总线、胎压监测(TPMS)、车载充电接口的过压防护(符合汽车级温度要求);
  3. 消费电子:USB Type-C接口、电源适配器、智能家电的静电/浪涌防护;
  4. 通信设备:基站射频接口、路由器电源线路、光纤收发器的雷电防护。

五、选型与使用提示

  • 单向vs双向:SMCJ48A为单向TVS(仅防护反向过压),若需双向防护(如交流线路),可选择同系列SMCJ48CA;
  • 电压匹配原则:电路正常反向工作电压需≤Vrwm(48V),避免TVS在正常工作时漏电流过大;
  • 功率匹配:需根据应用场景的浪涌能量(如雷击等级、开关次数),确认Ppp(1.5kW)是否满足需求。

SMCJ48A凭借晶导微电子的工艺可靠性与参数适配性,成为中低压电路过压防护的高性价比选择,适用于对尺寸、温度、防护能力有综合要求的场景。

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