WMSIC Electronic Components

Brightking SMAJ440CA/TR13 SMAJ440CA

ModelSMAJ440CA/TR13
PackageSMA(DO-214AC)
BrandBrightking
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Brightking SMAJ440CA / TR13
Type
BRIGHTKING
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Brightking
Electronic Component
SMAJ440CA/TR13
Electronic Component
1
Package
SMA(DO-214AC)
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.125g
Electronic Component
1
Electronic Component
BM0264590732
Voltage
713V
Electronic Component
IEC 61000-4-2
Current(Ir)
1uA
Voltage(VBR)
492V
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.

Brightking SMAJ440CA/TR13 瞬态抑制二极管(TVS)产品概述

Brightking(台湾君耀)SMAJ440CA/TR13是一款双向瞬态抑制二极管(TVS),专为中高压电路的瞬态过压防护设计,采用SMA(DO-214AC)贴片封装,具备高可靠性、小体积等特点,广泛应用于工业控制、通信、电源等领域。

一、核心功能与典型应用场景

SMAJ440CA/TR13的核心作用是快速抑制电路中的瞬态过压脉冲(如静电放电、浪涌电压),将电压钳位在安全范围内,保护后级敏感元器件(如IC、MOS管、传感器等)不受损坏。

典型应用场景:

  1. 工业控制设备:PLC输入输出端口、电机驱动电路、传感器接口的过压防护;
  2. 中高压电源电路:AC/DC电源、DC/DC转换器的输出端防护(适配380V左右工作电压场景);
  3. 通信接口:RS485、CAN总线、以太网等接口的静电及浪涌防护;
  4. 消费电子与家电:充电器、显示器、智能家电的电源端口防护。

二、关键电气参数解析

该器件的核心参数明确了其防护能力与适用范围,具体解析如下:

参数名称 典型值 意义说明 极性 双向 可同时防护正脉冲与负脉冲,无需额外配对管,简化电路设计 反向截止电压(Vₐᵣₘ) 440V 正常工作时器件处于截止状态的最大电压,需≥电路工作电压(如380V场景适配) 击穿电压(Vᵦ) 492V Vₐᵣₘ的1.12倍(TVS典型特性),电压超过此值时器件快速导通,启动防护 钳位电压(Vc) 713V 脉冲峰值时限制的最高电压,需≤后级器件最大耐压(如800V耐压器件可安全防护) 峰值脉冲电流(Ipp) 600mA 单次8/20μs脉冲波形下能承受的最大电流,决定防护强度 峰值脉冲功率(Ppp) 400W 脉冲功率容量,匹配实际应用中的瞬态功率需求 反向漏电流(Ir) 1μA 截止状态下的漏电流极小,不影响电路正常功耗

三、防护性能与标准认证

SMAJ440CA/TR13符合IEC 61000-4-2静电放电防护标准,可有效抵御人体放电(HBM)、机器放电(MM)等静电冲击,同时对浪涌电压(如雷击、开关浪涌)具备一定抑制能力。

  • 响应速度快:TVS管响应时间通常在纳秒级,能在瞬态过压出现时快速导通,比压敏电阻等器件响应更快;
  • 多次脉冲可靠性:经君耀可靠性测试,多次脉冲冲击后参数变化小,防护性能稳定。

四、封装与可靠性设计

1. 封装形式

采用SMA(DO-214AC)贴片封装,尺寸为2.7mm×1.6mm×1.1mm(典型值),体积小、重量轻,适合高密度PCB布局,支持自动贴装(SMT)工艺,生产效率高。

2. 可靠性特点

  • 工作温度范围宽:支持**-55℃至+150℃**(君耀TVS管典型温区),适配工业级宽温环境;
  • 焊接可靠性:封装采用高温无铅工艺,兼容回流焊、波峰焊等焊接方式,焊点可靠性高;
  • 长期稳定性:漏电流低且随温度变化小,不会因漏电流过大导致电路功耗增加或器件失效。

五、选型与应用注意事项

为确保防护效果,应用时需注意以下几点:

  1. 参数匹配:
    • Vₐᵣₘ需≥电路正常工作电压(如380V工作电压选440V Vₐᵣₘ);
    • 钳位电压Vc需≤后级敏感器件的最大耐压值;
    • Ppp需大于实际应用中可能出现的瞬态脉冲功率(如400W容量适配中等强度浪涌场景)。
  2. 电路布局:
    • 需并联在被保护电路两端(如电源正极与地、信号端与地之间);
    • 尽量靠近被保护端口,减少引线长度(降低引线电感,提升响应速度)。
  3. 多器件并联:若单管Ppp不足,可采用多个SMAJ440CA/TR13并联,提升总防护功率。

总结

Brightking SMAJ440CA/TR13是一款性能稳定、适配性强的双向TVS管,兼具小体积、高防护能力与宽温可靠性,适用于中高压电路的瞬态过压防护场景。其符合国际标准的防护性能与君耀的品牌可靠性,使其成为工业控制、通信、电源等领域的优选防护器件。

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