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CJ 1N4448WT
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ 1N4448WT
- Type
- CJ
- Minimum package
- 8000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- 1N4448WT
- Electronic Component
- 1
- Package
- SOD-523
- Electronic Component
- Switch Diode
- Electronic Component
- 0.011g
- Electronic Component
- 1
- Electronic Component
- BM0230137748
- Current
- 250mA
- Diode
- Electronic Component
- Current(Ir)
- 1uA@75V
- (Vf)
- 1.25V@150mA
- Power Dissipation(Pd)
- 150mW
- Electronic Component
- Electronic Component
- Electronic Component
- 8000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1N4448WT 产品概述
一、产品概况
1N4448WT 是 CJ（江苏长电/长晶）品牌的一款独立式开关二极管，采用 SOD-523 极小封装，面向高密度表贴电路。器件在 150mA 工作点时正向压降约为 1.25V，具有 75V 的直流反向耐压和 250mA 的持续整流电流，适合小功率、高速信号处理场合。
二、主要参数（关键数值）
- 正向压降 (Vf)：1.25 V @ 150 mA
- 直流反向耐压 (Vr)：75 V
- 整流电流：250 mA（连续）
- 耗散功率 (Pd)：150 mW
- 反向电流 (Ir)：1 µA @ 75 V
- 反向恢复时间 (Trr)：4 ns
- 非重复峰值浪涌电流 (Ifsm)：2 A（冲击脉冲）
- 封装：SOD-523，独立式贴片
三、特性与优势
1N4448WT 的主要优势在于低反向恢复时间（4 ns）与极低的反向漏电（1 µA @75V），使其在高速开关和高频信号链路中能够有效降低开通/关断损耗与串扰。SOD-523 超小封装便于在空间受限的移动设备、消费电子和通信终端中实现高密度布板。75V 的耐压和 250mA 的连续整流能力，使其在小功率保护与信号整形场景中有较好的通用性。
四、典型应用场景
- 高速开关与脉冲电路中的信号整流和钳位
- 逻辑电平隔离、信号通路方向控制（steering diode）
- EMI 抑制与瞬态钳位（与限流元件配合）
- 小功率电源回路、保护电路中的反向保护与反向切断
五、使用建议与注意事项
- 连续工作电流建议不超出 250 mA，且注意按 Pd（150 mW）做热设计与降额，SOD-523 的热阻较大，需在 PCB 布局上考虑散热与铜箔面积。
- 对于冲击电流（Ifsm 2A）应仅限短时脉冲，避免重复或长时间的浪涌。
- 在高反向电压场合关注反向漏流特性，推荐在工作电压接近 Vr 时进行实际温度下测试以确认性能。
- 焊接时遵循无铅回流温度曲线，避免过热导致封装应力或参数漂移。
六、封装与选型提示
SOD-523 体积小、引脚间距短，适合自动化贴装与高密度布板。选型时若需要更高电流或更低正向压降，应考虑更大封装或提升器件等级；若对速度要求更高，可对比更低 Trr 的肖特基或高速信号二极管。
总结：1N4448WT 以小型封装、低漏电与快速恢复为主要卖点，适合消费类电子、通信前端与小功率保护电路中的高速开关与信号整流应用。根据实际电流与功耗要求合理降额并做好 PCB 热管理，可获得稳定可靠的工作表现。
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