WMSIC Electronic Components

Jingdao Microelectronics 1N4148WT

Model1N4148WT
PackageSOD-523
BrandElectronic
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
Electronic 1N4148WT
Type
Jingdao Microelectronics
Minimum package
8000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
1N4148WT
Electronic Component
1
Package
SOD-523
Electronic Component
Switch Diode
Electronic Component
0.011g
Electronic Component
1
Electronic Component
BM0230630740
Current
150mA
Diode
1
Current(Ir)
1uA@75V
(Vf)
1.25V@150mA
Power Dissipation(Pd)
150mW
Electronic Component
55℃~+150℃@(Tj)
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.

1N4148WT 产品概述

一、产品简介

1N4148WT 是晶导微电子推出的一款高速开关二极管,采用超小型 SOD-523 封装,专为高速开关、信号整流与低电流保护设计。器件具有快速反向恢复时间、低漏电流和较高的非重复峰值浪涌能力,适合空间受限且要求高速响应的现代电子设备。

二、主要电气参数

  • 正向压降 (Vf):1.25V @ 150mA
  • 直流反向耐压 (Vr):75V
  • 整流电流:150mA(连续)
  • 耗散功率 (Pd):150mW
  • 反向电流 (Ir):1µA @ 75V
  • 反向恢复时间 (Trr):4ns
  • 非重复峰值浪涌电流 (Ifsm):800mA(单次浪涌)
  • 工作结温范围 (Tj):-55℃ ~ +150℃

以上参数在典型应用与标准测试条件下测得,设计时应考虑适当的余量与降额规则。

三、关键特性与优点

  • 高速开关:4ns 的反向恢复时间,适合高频脉冲与快速切换场景。
  • 低漏电流:在 75V 时反向电流仅 1µA,有利于低功耗电路与高阻抗节点的稳定性。
  • 小封装:SOD-523 小型封装便于高密度贴片和窄带宽器件布局。
  • 良好的浪涌承受能力:800mA 的非重复峰值浪涌支持瞬态启动与容错场景。
  • 宽工作温度范围:-55℃ 至 +150℃,适应工业级温度要求。

四、典型应用场景

  • 信号整形、脉冲限制与高速逻辑接口保护
  • 低电流的整流与反向保护(小电流电源、便携式设备)
  • 高频开关电路、振荡器阻断、耦合/去耦回路
  • 模拟/数字混合电路中的夹位与钳位保护

五、设计与布局建议

  • 热管理:器件功耗 Pd=150mW,连续工作时需注意降额与合理散热路径,避免长时间在高结温下运行。
  • PCB 布局:靠近被保护或整流的信号线放置,尽量缩短焊盘到目标节点的走线,减少寄生电感与电容以发挥快速开关特性。
  • 浪涌保护:对需承受频繁浪涌的应用,应采用串联限流或旁路钳位电路降低单器件应力。
  • 焊接工艺:遵循 SMD 焊接温度曲线,避免超过器件最高结温,焊接后建议进行回流温度控制与可靠性验证。

六、选型与替代

在选择 1N4148WT 时,若需更低正向压降或更高电流承载能力,可考虑封装更大、Pd 更高的型号;若需要更快恢复或更低漏电,可比较其他小信号快速恢复二极管的 Trr 与 Ir 指标。1N4148WT 的优势在于小型化与均衡的高速/耐压性能,适合对空间与速度都有要求的设计。

七、封装与订购信息

  • 封装:SOD-523(适合自动贴片)
  • 品牌:晶导微电子
  • 标准型号:1N4148WT
    订购时请确认批次与技术数据表(Datasheet),并与供应商核对最小订购量、包装形式及库存状态。

总结:1N4148WT 以其 4ns 的快速恢复、低漏电和小型封装,在高速信号与空间受限的应用中提供了可靠且经济的二极管解决方案。设计时关注热降额与 PCB 布局,可充分发挥其性能。

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