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TWGMC SMF12A TVS Diode SMF12A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMF12A
- Type
- TWGMC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TWGMC
- Electronic Component
- SMF12A
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.047g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0230007208
- Operating Temperature
- 55℃~+150℃
- Voltage
- 19.9V
- Current(Ir)
- 2.5uA
- Voltage(VBR)
- 14.7V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMF12A 产品概述
一、产品简介
SMF12A 是一款单向瞬态抑制二极管（TVS），由台湾迪嘉（TWGMC）出品，采用 SOD-123FL 表面贴装封装。器件针对 12V 工作系统设计，能够在突发瞬态过电压（如雷击、浪涌、开关瞬变）时迅速夹紧电压，保护后端敏感元件免受损坏。封装体积小、适合自动贴装，适用于车载、通信及工业控制等领域的输入保护与线路稳压保护。
二、主要参数
- 极性：单向（适用于直流线路）
- 反向截止电压 Vrwm：12 V
- 击穿电压 Vbr（Ibr 测试）：14.7 V（典型）
- 钳位电压 Vc：19.9 V（Ipp 条件下）
- 峰值脉冲电流 Ipp：10.1 A @ 10/1000 μs 波形
- 峰值脉冲功率 Ppp：200 W @ 10/1000 μs（单次脉冲能量评定）
- 反向漏电流 Ir：2.5 μA（常温）
- 通道数：单路
- 工作温度：-55 ℃ ~ +150 ℃
- 封装：SOD-123FL（SMT）
三、典型应用场景
- 汽车电子 12V/24V 辅助电路的瞬态保护（如车载传感器、点烟器接口等）
- 工业控制与传感器输入端浪涌保护
- 通信设备供电线路与接口保护（如 PoE 辅助电源、PoE 侧路需注意功率匹配）
- 电源模块输入端、稳压器后端及接口（USB、电源插座）防护
四、性能优势与使用建议
- 低漏电：2.5 μA 的低反向电流有利于节能和在高阻抗电路中的可靠工作。
- 有效夹位：在 10/1000 μs 浪涌条件下，钳位电压 19.9 V 能在保护器件与系统之间形成可靠的电压钳位，但需确认下游器件能承受该钳位电压。
- 单向设计：适合直流系统，能在正向发生导通时提供低阻抗通路以泄放浪涌能量。
- 布局建议：TVS 应尽可能靠近受保护端口或连接器放置，焊盘与走线尽量短且宽，以降低串联电感和提高热散能力。SOD-123FL 为常见 SMT 封装，兼容标准回流焊工艺。
- 能量与重复脉冲：200 W @10/1000 μs 为单次脉冲能力，若系统面临频繁浪涌或更高能量事件，应选用能量更高或并联/级联设计，并参考厂方冲击次数/能量退化曲线进行可靠性评估。
- 温度与老化：工作温度范围广（-55～+150 ℃），在高温环境中应考虑漏电与击穿特性漂移，长期使用建议留有安全裕量。
五、封装与可靠性信息
SOD-123FL 小型表贴封装适合自动化高速贴装及高密度 PCB 布局。器件在标准焊接温度曲线下可可靠回流焊接。为获得最佳保护效果，请遵循厂商推荐的 PCB 焊盘尺寸与热焊迹要求，并在设计阶段考虑散热路径与热阻。
总结：SMF12A 以其针对 12V 系统优化的阈值与钳位性能、紧凑的 SOD-123FL 封装和较高的单次浪涌承受能力，适合用作直流供电及信号接口的浪涌保护元件。在实际应用中应配合合理的 PCB 布局与能量评估，确保长期可靠运行。
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