WMSIC Electronic Components

Littelfuse SMF30CA

ModelSMF30CA
PackageSOD-123F
BrandLittelfuse
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

20 specifications

Core information

Product name
Littelfuse SMF30CA
Type
LITTELFUSE
Unit
Electronic Component
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
LITTELFUSE
Electronic Component
SMF30CA
Electronic Component
1
Package
SOD-123F
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.062g
Electronic Component
1
Electronic Component
BM0227280812
Operating Temperature
65℃~+150℃
Voltage
48.4V
Electronic Component
IEC 61000-4-4;IEC 61000-4-2
Current(Ir)
1uA

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

SMF30CA 产品概述

一、产品简介

SMF30CA 为 Littelfuse(美国力特)出品的一款双向(BI)瞬态抑制二极管(TVS),额定峰值脉冲功率200W,稳压电压等级适配30V系统。该器件专为保护电源线、数据线及接口电路免受雷击、静电放电和浪涌干扰而设计,适合工业、通信、汽车电子等对瞬态抑制有较高要求的场合。器件封装为 SOD-123F,体积小、散热可靠,便于表面贴装。

二、主要性能参数

  • 反向截止电压 (Vrwm):30V(工作反向电压上限)
  • 击穿电压:约33.3V(典型)
  • 钳位电压:约48.4V(在峰值脉冲条件下测得)
  • 峰值脉冲功率 (Ppp):200W(单次脉冲额定)
  • 峰值脉冲电流 (Ipp):4.1A(对应200W能量下的瞬态电流)
  • 类型:双向 TVS(二向导通,对正负瞬态均能吸收)
  • 封装:SOD-123F,适合自动贴装与波峰/回流焊工艺

三、典型应用场景

  • 直流24V/30V电源总线保护
  • 串口、通信接口(RS-485、CAN 等)浪涌防护
  • 工业控制设备、传感器接口的瞬态抑制
  • 工程机械与建筑自动化中对雷击/浪涌敏感的节点保护

四、封装与可靠性

SOD-123F 封装提供良好的热阻与焊接可靠性,适配高密度 PCB 布局。Littelfuse 品质控制与封装工艺保证了在规范脉冲条件下的重复能量承受能力,长期可靠性取决于脉冲频率与能量大小,应依据实际工况评估寿命。

五、典型布局与使用注意事项

  • 尽量将 TVS 放置于被保护端口与 PCB 引入点附近,缩短走线以降低寄生电感。
  • 与接地面的连接应尽可能宽短,减小回流阻抗,提高吸收能力。
  • TVS 不是限流器,不适合承受持续过压;若存在长期高压,应采用限流、稳压或熔断保护配合。
  • 在高重复脉冲场合,需要按数据手册对功率、能量和温度进行裕度设计,防止器件过热失效。

六、选型建议

当系统工作电压不超过30V 且需双向浪涌保护时,SMF30CA 是紧凑且成本效益高的选择。若系统允许更低的钳位电压或需承受更大脉冲电流,应考虑更高功率等级或并联/配合熔断器使用。最终选型请参考 Littelfuse 的完整数据手册,结合实际脉冲波形、频率和环境温度进行电气与热裕量计算。

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