WMSIC Electronic Components

DOWO 1.5KE51A

Model1.5KE51A
PackageDO-201
BrandDOWO
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
DOWO 1.5KE51A
Type
DOWO
Minimum package
1250 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
1.5KE51A
Electronic Component
1
Package
DO-201
Electronic Component
Electronic Component
Type
TVS
Electronic Component
ESD and Surge Protection (TVS / ESD)
Electronic Component
0.94g
Electronic Component
1
Electronic Component
BM0264801960
Operating Temperature
55℃~+150℃
Voltage
70.1V
Current(Ir)
1uA
Voltage(VBR)
48.45V
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.

1.5KE51A 产品概述

一、产品简介

1.5KE51A 是 DOWO(东沃)推出的一款高能量吸收型瞬态电压抑制二极管(TVS),采用玻璃钝化芯片工艺并封装于 DO-201 轴向封装中。该器件为单向(单极)设计,专为抑制脉冲过电压、雷击和电磁干扰引起的瞬态冲击而优化,具有快速响应、低漏电和优异的钳位能力,适用于工业、通信、电源保护及 48V 直流系统等需要高冲击能量吸收的场合。

二、关键电气参数

  • 极性:单向(单极)
  • 反向截止电压 Vrwm:51 V
  • 击穿电压 VBR(I BR 指定):48.45 V
  • 钳位电压 Vc(Ipp):70.1 V
  • 峰值脉冲电流 Ipp(10/1000 μs):21.4 A
  • 峰值脉冲功率 Ppp(10/1000 μs,重复率/占空比 0.01%):1.5 kW
  • 反向漏电流 Ir:1 μA(在规定 Vrwm 下)
  • 工作温度范围:-55 ℃ ~ +150 ℃
  • 封装:DO-201(轴向)
  • 特性:玻璃钝化芯片、低漏电、极快响应、RoHS 符合

三、主要特性与优势

  • 1500 W 峰值脉冲功率能力(10/1000 μs):对长脉冲能量有良好吸收能力,能够在较长持续时间的浪涌事件中保护下游电路。
  • 低漏电流(Ir≈1 μA):适合对静态功耗敏感的系统,长期待机时不会显著增加泄漏电流。
  • 钳位电压较低(70.1 V):在 Vrwm=51 V 条件下能有效限制被保护节点电压,减小对后级元件的应力。
  • 玻璃钝化芯片:提高器件长期稳定性与抗湿热、抗氧化能力,适合苛刻环境。
  • DO-201 轴向封装:便于波峰焊或手工焊接,适合通过孔(THT)装配与维修替换。
  • 单向与双向可选:单向型号适合直流电源或极性明确的保护场景,双向款可用于交流或双向脉冲保护。

四、典型应用场景

  • 48 V 通信、基站电源及 PoE 系统的直流总线保护。
  • 工业控制与自动化设备中的电源浪涌与反接保护。
  • 电源模块、逆变器、充电桩等含较大瞬态能量的电源接口。
  • 电池管理与储能系统的输入/输出保护(需与系统工作电压匹配)。
  • 需要通过孔安装、现场可更换的浪涌吸收场合。

五、选型与使用建议

  • 电压配合:选择 TVS 时应确保器件的 Vrwm 稍高于系统正常工作电压。1.5KE51A 的 Vrwm=51 V,适合 48 V 类直流系统或正常工作电压略低于 51 V 的场合。
  • 能量余量:尽管本器件在 10/1000 μs 波形下 Ppp=1.5 kW,仍建议对可能的最大脉冲能量进行评估并留有余量;对于反复且高频率的冲击,应考虑并联或采用更高能量器件。
  • 钳位电压影响:钳位电压决定被保护器件承受的最大瞬态电压,选择时须确保下游元件能承受约 70.1 V(在典型 Ipp 条件下)的尖峰。
  • 热管理与布局:在高能量脉冲后器件会产生热量,合理的散热路径和线路宽度、避免靠近热敏感元件,可延长寿命并提高可靠性。
  • 焊接与装配:DO-201 为轴向引线封装,兼容常规焊接工艺。装配时注意不要对玻璃钝化芯片施加机械应力或强烈震动。

六、可靠性与合规

1.5KE51A 采用玻璃钝化芯片,提高在高湿、温度循环等恶劣环境下的稳定性与可靠性;额定工作温度宽(-55 ℃ 至 +150 ℃),适合工业级使用。器件符合 RoHS 环保要求,满足大多数行业对无铅、环保材料的规范。

七、总结

1.5KE51A 是一款面向高能量瞬态防护的单向 TVS 二极管,具有 1500 W 峰值功率能力、低漏电、优良钳位性能与玻璃钝化工艺,封装为 DO-201 轴向形式,适用于 48 V 类直流系统、工业电源及需要可靠浪涌保护的应用场景。选型时应根据系统工作电压、最大脉冲能量和钳位容忍度做综合评估,以确保长期稳定可靠的保护效果。若需双向保护或不同 Vrwm 值,可咨询东沃(DOWO)更多型号选择与样品支持。

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