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MDD DSF1D
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD DSF1D
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- DSF1D
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Fast Recovery / High-Efficiency Diode
- Electronic Component
- 0.039g
- Electronic Component
- 1
- Electronic Component
- BM0229465237
- Current
- 1A
- Diode
- 1
- Current(Ir)
- 100uA
- (Vf)
- 1.25V@1A
- Electronic Component
- 55℃~+150℃
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
DSF1D 超快恢复二极管产品概述
一、产品简介
DSF1D（别名 E1D）为 MDD 推出的超快恢复整流二极管，采用 SOD-123FL 低剖面封装，面向开关电源、开关管自由轮回、功率整流与保护等高速开关场合设计。该器件在 1A 工作电流下具有较低正向压降与快速的反向恢复特性，适合要求较高电压耐受能力又需快速切换的应用。
二、主要参数
- 二极管类型：独立式整流二极管
- 正向压降 Vf：1.25 V @ 1.0 A
- 直流反向耐压 Vr：200 V
- 平均整流电流（IO）：1 A
- 反向漏电流 Ir：100 µA（典型/最大值视温度而增）
- 反向恢复时间 Trr：35 ns（超快恢复）
- 非重复峰值浪涌电流 Ifsm：30 A（脉冲）
- 工作结温范围 Tj：-55 ℃ ~ +150 ℃
- 封装：SOD-123FL
三、特性与优势
- 高电压耐受：200 V 反向电压适用于中高压开关电源与变换器。
- 超快恢复：35 ns 的反向恢复时间显著降低开关损耗与交越损耗，提升效率并减小电磁干扰（EMI）带宽。
- 良好峰值浪涌能力：30 A 的非重复峰值浪涌允许在启动、短路或大电流充电情形下短时间承受冲击。
- 小型低剖面封装：SOD-123FL 便于表贴加工、密集 PCB 布局及良好焊接可靠性。
- 宽温区工作能力：-55～150 ℃ 的结温范围利于高温工作环境下的稳定性。
四、典型应用场景
- 开关电源（SMPS）次级整流与初级续流器件
- 贴片式功率转换模块（如升压、反激、半桥、全桥）
- 自由轮回二极管与电感放电回路
- 极性保护、反向电流阻断与浪涌抑制电路
- 工业与民用电子中需要高压+快速恢复的整流场合
五、封装与热管理建议
SOD-123FL 提供较低热阻与小占板面积，但在连续 1 A 以上工作时仍需注意散热与 PCB 散热铜皮面积。建议：
- 在管脚附近增加散热铜箔并与底层铺铜连通；
- 使用合理的锡膏、焊盘设计以降低接触热阻；
- 对于高平均功率场合，进行热仿真并采用合适的元件间距与通风。
六、使用注意事项
- 反向漏流会随温度增加而上升，设计时考虑最大工作温度下的漏电影响；
- 在高 dv/dt 环境中仍可能产生尖峰电压，应配合 RC 缓冲或箝位电路以保护器件；
- 浪涌电流 Ifsm 为非重复脉冲能力，长期重复冲击会损害器件；
- 焊接应遵循厂商推荐的回流曲线并注意防潮保存。
七、选型建议
如需在高压（≥200 V）且要求快速恢复的整流位置，DSF1D 为经济有效的选择。若对正向压降有更严格要求且电压较低，可考虑 Schottky 型器件；若对反向恢复更快或更低反冲能要求更高，则评估更短 Trr 或零恢复的器件。最终选型请以实际工作电流、浪涌特性、温度范围及 PCB 散热能力为准，并参考完整数据手册进行热应力与寿命验证。
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