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Slkor SMF28A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Slkor SMF28A
- Type
- SLKOR
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- SLKOR
- Electronic Component
- SMF28A
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.042g
- Electronic Component
- 1
- Electronic Component
- BM0228146947
- Operating Temperature
- 55℃~+150℃
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 34.4V
- 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.
SMF28A TVS 二极管（SOD-123FL）产品概述
一、产品简介
SMF28A 是一款单向硅瞬态抑制二极管（TVS），封装为 SOD-123FL，由 Slkor（萨科微）生产。器件专为静电放电（ESD）和浪涌过电压保护设计，适用于小型表贴电路板，能在瞬态冲击下快速箝位并保护后端敏感器件。
二、主要电参数
- 极性：单向
- 反向工作电压 Vrwm：28 V
- 击穿电压（Bv）：约 34.4 V
- 钳位电压（Vc）典型值：45.4 V
- 峰值脉冲电流 Ipp（10/1000 μs）：4.4 A
- 峰值脉冲功率 Ppp（10/1000 μs）：200 W
- 反向电流 Ir：1 μA（在 Vrwm 下）
- 工作温度范围：-55 ℃ 至 +150 ℃
三、关键特性与优点
- 快速响应：对瞬态高压脉冲有亚微秒级响应，能把过电压快速钳制至安全水平。
- 小型封装：SOD-123FL 体积小，适合集成密集型 PCB 设计。
- 低泄漏电流：在正常工作电压下 Ir 仅约 1 μA，有利于低功耗系统。
- 宽温工作：-55 ℃ 至 +150 ℃，适应工业级环境。
四、典型应用场景
- 24 V / 28 V 电源保护、工业控制设备、电源模块。
- PoE（以太网供电）端口和通信接口的浪涌保护。
- 接口保护：RS-485、CAN、UART 等差分或单端信号线的电压浪涌防护（需按应用选型）。
- 一般电子设备的输入端、连接器处用于抑制雷击、浪涌与静电干扰。
五、封装与机械信息
SOD-123FL 小巧表贴封装，便于自动贴装与回流焊工艺。封装需注意热量散布与焊盘设计，以确保脉冲能量时的可靠散热和机械强度。
六、使用建议
- 布局：将 SMF28A 尽量靠近受保护端口或连接器放置，减少引线和铜箔的感抗。
- 接地：为保证钳位效果，尽量提供低阻抗的参考地或地平面。
- 能量限制：虽然器件能承受 10/1000 μs 串形波 200 W，但对多次或更长时间高能冲击应采用级联保护或更高能量元件。
- 与串联元件配合：必要时可与熔断器、限流电阻或电感配合使用，限制冲击能量传递到更下游电路。
七、可靠性与注意事项
- 器件适合一般工业环境，但若用于汽车或需要 AEC 认证的场合，请确认对应认证与额定。
- 回流焊温度应按厂商推荐曲线控制，避免超温影响器件特性与寿命。
- 储存与搬运避免静电和机械冲击，使用符合 ESD 管理的操作流程。
八、替代与选型提示
在选型时若需要更高钳位电流或更高能量吸收能力，可考虑相同封装或更大封装的高功率 TVS。若系统工作电压不同，选用 Vrwm 更接近系统正常电压的型号以获得最佳保护效果。
如需器件数据表（Datasheet）、封装尺寸图或在特定应用中的测试曲线，可提供进一步支持以便完成最终选型与 PCB 设计。
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