WMSIC Electronic Components

WILLSEMI ESD9N18BA-2/TR ESD9N18BA

ModelESD9N18BA-2/TR
PackageDFN1006-2L
BrandWILLSEMI
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
WILLSEMI ESD9N18BA-2 / TR
Type
WILLSEMI
Minimum package
10000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
WILLSEMI
Electronic Component
ESD9N18BA-2/TR
Electronic Component
1
Package
DFN1006-2L
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.011g
Electronic Component
1
Channel Count
Electronic Component
Cj- Capacitor
8pF
Electronic Component
BM0257628572
Voltage
24V
Electronic Component
IEC 61000-4-5;IEC 61000-4-2
Current(Ir)
500pA

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

ESD9N18BA-2/TR 产品概述

一、产品简介

ESD9N18BA-2/TR 为 WILLSEMI(韦尔)出品的单路双向瞬态抑制二极管(TVS)。器件针对瞬态过压与静电放电事件提供快速钳位保护,适用于需要低漏电与低电容的敏感信号与电源接口。封装为 DFN1006-2L,体积小,利于贴片化高密度布局。

二、主要电气参数

  • 极性:双向(对称钳位正负极)
  • 反向截止电压 Vrwm:18 V
  • 击穿电压 Vbr:21 V
  • 钳位电压 Vc:24 V(Ipp 条件下)
  • 峰值脉冲电流 Ipp:6.5 A(8/20 μs)
  • 反向电流 Ir:500 pA(典型,保持低功耗)
  • 结电容 Cj:8 pF(适合高速信号线)
  • 通道数:单路
  • 防护等级:符合 IEC 61000-4-5(浪涌)与 IEC 61000-4-2(静电)

三、典型应用场景

  • 数据与通信接口保护(如 RS‑485、CAN、USB 等需低电容场合)
  • 工业控制、仪表与传感器接口的输入防护
  • 电源输入与局部电路的浪涌/静电防护(在工作电压低于 Vrwm 的系统)
  • 需要低漏电、高可靠钳位的便携与低功耗设备

四、封装与PCB布局建议

  • DFN1006-2L 小型贴片封装,建议将器件尽量靠近受保护的接口或引脚放置,以缩短导线感抗与提升钳位效率。
  • 布局时保持到接地面的短而粗的回流路径,必要时添加多个过孔导通至多层地平面以降低回流阻抗。
  • 对高速差分/单端信号,8 pF 的结电容有利于信号完整性,但仍应避免将 TVS 并联于极短抑制路径外侧导致串扰。
  • 焊接与回流按 DFN 封装工艺规范进行,注意焊盘设计与焊膏量控制以保证可靠焊接。

五、选型与注意事项

  • 确认器件的 Vrwm(18 V)大于系统最大工作电压,且钳位 24 V 在峰值脉冲条件下能保护下游组件。
  • 双向器件适用于存在双向过压或交流耦合场合;若仅在单极性电源侧使用,可考虑单向型。
  • 虽然 Ipp=6.5 A 能承受常见浪涌,但对更大能量事件应配合外部限流元件(如熔丝或串联电阻)与系统级防护。
  • 若需车规或更高等级认证,确认是否满足相应可靠性标准(本型号注明 IEC 静电与浪涌等级)。

六、性能认证与可靠性

器件通过 IEC 61000-4-2 与 IEC 61000-4-5 相关等级测试,能在工业与民用环境中提供稳健的 ESD 与浪涌防护。低漏电(500 pA)与低结电容(8 pF)使其在低功耗与高速信号应用中兼顾保护与性能,是对单路线路进行集中保护的有效元件选择。

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