WMSIC Electronic Components

TECH PUBLIC SMF28CA

ModelSMF28CA
PackageSOD-123FL
BrandTECH PUBLIC
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
TECH PUBLIC SMF28CA
Type
TECH PUBLIC
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TECH PUBLIC
Electronic Component
SMF28CA
Electronic Component
1
Package
SOD-123FL
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.042g
Electronic Component
1
Channel Count
Electronic Component
Electronic Component
BM0264777498
Operating Temperature
55℃~+150℃
Voltage
45.4V
Current(Ir)
1uA
Voltage(VBR)
34.4V

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

SMF28CA 产品概述

一、产品简介

SMF28CA 是 TECH PUBLIC(台舟电子)推出的一款单路双向瞬态电压抑制(二极管型 TVS)器件,采用 SOD-123FL 小型封装,专为抑制瞬态过压和浪涌能量设计。器件在 10/1000 μs 脉冲条件下可承受高达 200W 的峰值功率,适合对电源线、数据接口及移动设备附件等敏感电路提供可靠保护。

二、主要特性

  • 极性:双向(双向钳位,适用于可正负摆幅的电压瞬变场合)。
  • 反向额定电压(Vrwm):28 V(持续工作电压上限)。
  • 击穿电压(VBR):34.4 V(IV 测试条件下的击穿区间)。
  • 钳位电压(Vc):45.4 V(Ipp 条件下的钳位电压)。
  • 峰值脉冲电流(Ipp):4.4 A @ 10/1000 μs。
  • 峰值脉冲功率(Ppp):200 W @ 10/1000 μs。
  • 反向漏电流(Ir):典型 1 μA(在 Vrwm 下)。
  • 工作温度范围:-55 ℃ 至 +150 ℃。
  • 通道数:单路。
  • 无卤,符合 RoHS 要求。
  • 封装:SOD-123FL,便于表面贴装和自动化生产。

三、电气参数摘要

SMF28CA 在额定 Vrwm=28 V 下保持极低漏电流,能在遇到短时高能量浪涌(以 10/1000 μs 波形衡量)时吸收并钳位电压至约 45.4 V,从而保护下游器件免受过压损害。击穿区间 VBR≈34.4 V 表明器件在略高于 Vrwm 条件下进入导通状态,提供有效的瞬变钳位。峰值功率和峰值脉冲电流性能使其能应对典型工业或消费场景中的浪涌冲击。

四、性能与应用建议

  • 保护对象:适用于电源线及对瞬态浪涌敏感的接口(如充电口、数据线接口、外设连接器等)。
  • 布局建议:将 SMF28CA 尽可能靠近受保护的连接器或 IC 布置,最短引线有助于降低寄生电感,改善钳位效果。
  • 热管理:SOD-123FL 为小型封装,长时间或高频次大能量冲击会产生热量,设计时应考虑 PCB 散热面积及热沉路径以提高可靠性。
  • 双向特点:适用于直流电源线的双向浪涌(例如可存在反向连接或交流耦合的场合)以及可能出现负向瞬态的信号线保护。

五、封装与机械信息

封装类型为 SOD-123FL,适配自动贴装流程,体积小巧便于在空间受限的消费电子产品中使用。该封装同时提供可靠的焊接强度及良好的热传导能力,适合批量生产与装配。

六、可靠性与合规性

  • 工作温度范围宽(-55 ℃ 至 +150 ℃),可满足工业级和消费级在恶劣环境下的长期可靠性需求。
  • 低漏电流(Ir≈1 μA)有利于低功耗系统的长期待机表现。
  • 器件为无卤设计并符合 RoHS,要点利于符合现代环保法规与产品认证要求。

七、典型应用场景与选型建议

  • 移动设备及其配件:PDA、智能手机充电线路、数据线接口保护。
  • 小型电源线保护:适用于最长工作电压不超过 28 V 的直流供电线路。
  • 外围设备与附件:蓝牙配件、移动电源接口、车载小功率模块等。
    选型时应确认系统最大工作电压不超过 Vrwm,且允许在极端浪涌时由约 45.4 V 的钳位电压承受短时过压。若应用对钳位电压敏感(必须低钳位),需考虑更低 Vc 的替代型号;若系统峰值浪涌能量超出 200 W(10/1000 μs),则需并联或选用额定更高的器件和配套熔断保护。

八、注意事项

  • 仅用于瞬态抑制,不作为长期分流或稳压元件。
  • 在高能量应力下器件会吸收大量能量,过度重复冲击会降低寿命,应在系统层面评估防护等级。
  • 安装时注意端子焊接质量与焊接温度曲线,以免影响性能与可靠性。

如需进一步的电性能曲线、封装尺寸图或批量订购信息,可联系 TECH PUBLIC(台舟电子)或其授权分销渠道获取详细资料与样品。

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