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DIOTEC 1N4448W
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DIOTEC 1N4448W
- Type
- DIOTEC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DIOTEC
- Electronic Component
- 1N4448W
- Electronic Component
- 1
- Package
- SOD-123F
- Electronic Component
- Switch Diode
- Electronic Component
- 0.063g
- Electronic Component
- 1
- Electronic Component
- BM0264583321
- Current
- 150mA
- Diode
- Electronic Component
- Current(Ir)
- 100nA
- (Vf)
- 1V@150mA
- Power Dissipation(Pd)
- 400mW
- 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.
1N4448W 产品概述
一、产品定位与封装
1N4448W 为小信号开关二极管，属于高速开关/信号整流器件，常见于开关、逻辑接口和高频信号路径中。该型号由 DIOTEC（德欧泰克）生产，常见为 2 引脚 SOD-123F 小外形封装，亦以带卷盘（T/R）形式供货，便于贴片生产线使用。
二、主要电气参数
- 最大反向耐压（Vr）：75 V（典型应用中标称 100 V 类别的元件亦有类似性能）
- 额定整流电流（If）：150 mA（连续正向电流）
- 非重复峰值浪涌电流（Ifsm）：1 A（短时浪涌）
- 正向压降（Vf）：约 1.0 V @ 150 mA
- 反向电流（Ir）：典型 100 nA（室温下）
- 反向恢复时间（Trr）：约 4 ns（高速开关）
- 功率耗散（Pd）：400 mW（封装/热阻限制下）
- 结温范围（Tj）：-55 ℃ ~ +150 ℃
这些参数表明 1N4448W 在低电流、高速切换场景下表现良好，同时保持低泄漏、电压耐受适中。
三、典型应用场景
- 高速数字与模拟信号切换、门电路保护与隔离
- 小电流整流、采样保持电路、脉冲限幅器
- 逻辑电平移位、输入保护、电路防反接与钳位
- 高频通信、射频前端的开关与保护（需关注封装寄生参数）
四、PCB 与热设计要点
- 由于 Pd 仅 400 mW，长时间大电流使用需注意热量散逸，应增大焊盘铜面积以降低结到外部的热阻。
- 连续电流建议不长期接近 150 mA，按环境温度做降额（高温下应显著降低允许电流）。
- 浪涌电流 1 A 为短时能力，设计中不应作为常态浪涌承受规范。
五、可靠性与装配建议
- 封装适合标准回流焊装配，建议参考厂方回流曲线（避免超时超温以保护内芯）。
- 卷带盘装（T/R）便于 SMT 高速贴片；储存时防潮防尘，若属于高湿度敏感等级（MSL），按规定回流前做回烘处理。
- 对于要求极低反向泄漏或更高耐压的应用，可在设计时做筛选或选用更高规格替代品。
六、与常见同类器件的比较
相较于经典 1N4148 系列，1N4448W 在封装与额定电流上更适合 SMD 生产与稍高的持续电流需求；反向恢复时间约 4 ns，适合一般高速逻辑与脉冲应用，但在极高频或极低电容要求下仍需评估器件的寄生参数。
七、设计与选型提示
- 若电路中存在频繁的脉冲切换，优先关注 Trr 与正向恢复特性；若系统对漏电流敏感，应选取低 Ir 器件并验证温升下的泄漏变化。
- 在功率边界处工作时，给出足够安全裕量并在 PCB 上做好散热设计。
- 生产采购时确认封装（SOD-123F）与包装方式（T/R）以保证贴片兼容性。
概括来说，1N4448W 是一款面向小信号、高速开关领域的性价比良好的 SMD 二极管，适用于多种低功耗、高频率的电子设计场景，使用时以热管理与工作电流降额为主要注意点。
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