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DOWO SMF3.3A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMF3.3A
- Type
- DOWO
- Minimum package
- 3000
Technical parameters
- Electronic Component
- DOWO
- Electronic Component
- SMF3.3A
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.04g
- Electronic Component
- 1
- Electronic Component
- BM0209688788
- Voltage
- 8V
- Electronic Component
- IEC 61000-4-2；IEC 61000-4-4
- Current(Ir)
- 500uA
- Voltage(VBR)
- 5.2V
- Electronic Component
- 3000
- Power(Ppp)
- 200W@10/1000us
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMF3.3A 瞬态抑制二极管（TVS）产品概述
一、产品简介
SMF3.3A 是一款单向瞬态电压抑制二极管（TVS），由 DOWO（东沃）生产，封装为 SOD-123FL。该器件针对静电放电（ESD）和快速瞬变脉冲干扰提供高效保护，适用于低压数字接口和电源线上对浪涌与尖峰抑制需求严格的应用场景。
二、主要性能特点
- 钳位电压（VC）：8V（在 IPP=25A 条件下），有效限制瞬态电压峰值，保护后级电路。
- 击穿电压（BR，min）：5.2V，确保在过压时可靠导通。
- 反向截止电压（Vrwm）：3.3V，适配 3.3V 系统工作电压。
- 峰值脉冲功率（Ppp）：200W（10/1000µs），对工业级浪涌有较强承受能力。
- 峰值脉冲电流（Ipp）：25A（对应 VC 测试条件）。
- 反向漏电流（Ir）：≤500µA，低漏电利于功耗控制。
- 极性：单向，简化正向保护设计。
- 防护等级：符合 IEC 61000-4-2（ESD）与 IEC 61000-4-4（EFT）测试要求。
三、典型应用场景
- 3.3V 电源总线与供电接口保护；
- USB、HDMI、串口、以太网等数据接口的瞬态保护；
- 智能终端、通信设备、工业控制与汽车车载电子（非关键安全回路）中的浪涌防护；
- PCB 边缘器件、模块化电源板及接口板的局部防护。
四、封装与安装要点
SOD-123FL 小型封装便于贴片工艺，适合自动贴片和回流焊。布板时建议将 TVS 靠近被保护引脚放置，并确保良好接地回流路径，缩短接地环路以降低剩余电感，提升吸收效果。
五、选型与设计建议
- 系统工作电压为 3.3V 时优先选择；若需对称双向保护请选用双向型号。
- 对于长线或需更高能量吸收的场合，可并联或选用更高 Ppp 的器件。
- 注意器件的功率曲线和脉冲宽度特性，10/1000µs 标准适用于多数工业浪涌场景，但对 IEC 雷击类更长脉冲需评估余量。
六、可靠性与测试
本型号通过 IEC 61000-4-2 与 IEC 61000-4-4 规范测试，具备良好的 ESD 与电快速瞬变抑制能力。建议在最终产品认证前，结合实际布线与模块级测试验证其保护性能。
七、结语
SMF3.3A 提供针对 3.3V 系统的高效、低漏电、低钳位解决方案，封装小巧便于布板，是保证信息接口与电源线抗干扰与耐冲击能力的可靠选择。选用时请结合系统峰值电流、脉冲能量与布局实现最佳保护效果。
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