WMSIC Electronic Components

TECH PUBLIC SR70

ModelSR70
PackageSOT-143-4
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 SR70
Type
TECH PUBLIC
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TECH PUBLIC
Electronic Component
SR70
Electronic Component
1
Package
SOT-143-4
Electronic Component
Electronic Component
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.036g
Electronic Component
1
Channel Count
Electronic Component
Cj- Capacitor
3pF
Electronic Component
BM0227776266
Voltage
7V
Electronic Component
IEC 61000-4-5;IEC 61000-4-2
Current(Ir)
1uA
Voltage(VBR)
85V

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

SR70 产品概述

一、产品简介

SR70 是 TECH PUBLIC(台舟电子)推出的一款双路单向静电与浪涌保护二极管(TVS/ESD),封装为 SOT-143-4,专为工业与消费类电子设备的接口保护设计。器件符合 IEC 61000-4-2(静电放电)与 IEC 61000-4-5(浪涌)防护标准,能够在突发过压事件中保护下游敏感电路。

二、主要参数与电气特性

  • 钳位电压(Vc):7V(典型,建议以实际测试条件校准)
  • 击穿电压(Vbr):85V
  • 反向截止电压 Vrwm:70V(最大安全工作电压)
  • 峰值脉冲电流 Ipp:24A @ 8/20µs
  • 反向漏电流 Ir:1µA(静态低功耗)
  • 结电容 Cj:3pF(低电容,利于高速信号完整性)
  • 通道数:双路,极性:单向
  • 封装:SOT-143-4(小体积,利于高密度布局)

三、主要特性与优势

  • 高效浪涌吸收能力:在 8/20µs 工况下可承受 24A 峰值脉冲电流,有效抑制瞬态过电压。
  • 低钳位电压:7V 钳位可在保护同时降低对后续器件的应力。
  • 低结电容:3pF 级别,适合对信号完整性要求高的接口(如高速串行、差分信号线路)。
  • 低漏电流:1µA,有利于低功耗和待机应用。
  • 符合工业级防护标准:通过 IEC 61000-4-2 / IEC 61000-4-5 认证要求,适合工业现场与严苛电磁环境。

四、典型应用场景

  • 通讯接口保护:RS-232/RS-485、以太网 PHY 端口(注意接口极性匹配)
  • 工业控制与现场总线:PLC、传感器接口、现场设备输入端口
  • 消费类电子:USB/HDMI 等需低电容保护的高速信号(需确认单向特性与信号方向匹配)
  • 电源与电池管理保护:对小电压突变与浪涌事件提供第二道防线

五、PCB 布局与可靠性建议

  • 尽量将 SR70 放置在被保护器件与连接器之间,靠近受保护引脚以缩短走线感应电感。
  • 将器件的接地端通过低阻抗大铜箔或多盲/过孔回流至系统地平面,减少回路电感。
  • 对于高速差分信号,注意配对走线一致性,器件引脚到信号线的过渡应最小化串扰。
  • 在高能量应用中建议在外部配合限流元件或浪涌抑制器使用,以提高系统整体耐受能力。

SR70 以其小体积、低电容和符合 IEC 浪涌/静电标准的特性,适合在需要兼顾信号完整性与稳健防护的场合使用。选型时请结合实际工作电压、信号方向与系统剩余能量评估器件的匹配性。

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