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DOWO SMF3.3CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMF3.3CA
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMF3.3CA
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.044g
- Electronic Component
- 1
- Electronic Component
- BM0230654938
- Voltage
- 8.8V
- Electronic Component
- IEC 61000-4-4；IEC 61000-4-2
- Current(Ir)
- 500uA
- Voltage(VBR)
- 6.5V
- 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.
SMF3.3CA 产品概述
一、主要性能概览
SMF3.3CA 是一款用于电路浪涌和静电放电保护的双向瞬态电压抑制二极管（TVS），由 DOWO（东沃）提供，常见封装为 SOD-123FL。器件针对 3.3V 工作电压系统设计，能在瞬态冲击发生时迅速钳位电压，保护下游器件免受过电压损害。
二、核心电气参数
- 反向截止电压 Vrwm：3.3V（适用于 3.3V 电源及数据线防护）
- 击穿电压（Vbr）：6.5V
- 钳位电压（Vc）：8.8V（在标准脉冲条件下）
- 峰值脉冲功率 Ppp：200W （10/1000 μs）
- 峰值脉冲电流 Ipp：22.7A（10/1000 μs）
- 反向电流 Ir：500 μA（典型，在 Vrwm 条件下）
- 极性：双向（可同时抑制正负极性瞬态）
三、保护特性与符合标准
SMF3.3CA 针对常见的瞬态干扰提供高效能量吸收能力，能承受 IEC 61000-4-4（EFT）与 IEC 61000-4-2（ESD）等电磁兼容测试规范要求，有助于提升系统对瞬态脉冲和静电放电的抗扰能力。
四、封装与物理特性
SOD-123FL 封装尺寸小、热阻较低，适合表面贴装（SMT）工艺。该封装便于靠近受保护节点布局，从而最小化走线感应和延迟，提高防护效果。
五、典型应用场景
- 3.3V 电源总线、局部稳压输出保护
- MCU、FPGA 等数字接口与 I/O 引脚防护
- 通讯接口、传感器信号线和低压差电源线路的瞬态抑制
- 工业与消费类电子中需要符合 IEC ESD/EFT 的场合
六、使用与选型建议
- 将器件尽量贴近被保护端口焊接，短且宽的接地回路可降低钳位电压提升防护效率。
- 注意反向漏电 Ir（约 500 μA）对低功耗或待机电流敏感电路的影响，必要时可采用并联或隔离手段减小泄漏影响。
- 在需要承受更高能量或重复脉冲情形下，应与保险丝、限流电阻等配合使用，以防器件超出脉冲额定而损坏。
- 遵循器件的脉冲能量额定（200W@10/1000 μs），避免长期超额冲击。
七、常见注意事项
- 双向器件在正常工作时对直流电压不会稳态钳位，但在接收到反向/正向瞬态时会导通吸收能量。
- 选型时核对系统的最大允许钳位电压与被保护器件的耐压，确保 8.8V 钳位电平不会损伤下游器件。
- 出于可靠性考虑，设计时应考虑温度、焊接应力与电流冲击的累积效应。
SMF3.3CA 以其紧凑封装、较高的脉冲吸收能力和符合 IEC ESD/EFT 标准的特性，适合在对瞬变抑制有较高要求的 3.3V 系统中作为前端保护元件使用。
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