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Jingdao Microelectronics SMF20A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMF20A
- Type
- Jingdao Microelectronics
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- SMF20A
- Electronic Component
- 1
- Package
- SOD-123FL
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.03g
- Electronic Component
- 1
- Electronic Component
- BM0264858927
- Operating Temperature
- 55℃~+150℃
- Voltage
- 32.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 24.5V
- 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.
晶导微电子SMF20A TVS二极管产品概述
一、产品基本定义与封装信息
SMF20A是瞬态抑制二极管（TVS），核心作用是吸收电路中的浪涌脉冲（如静电、雷击、开关干扰），快速将电压钳位在安全范围，保护后端敏感电子元器件（如IC、传感器）。
该产品由国内知名半导体厂商晶导微电子出品，采用SOD-123FL表面贴装封装：尺寸约2.5×1.25mm，厚度0.8mm，属于小尺寸贴片封装，适配高密度PCB布局，支持自动化贴片生产，效率高、占用空间小。
二、核心电性能参数解析
SMF20A的参数针对中低压电路防护优化，关键参数及意义如下：
参数名称 规格值 实际意义 反向截止电压（Vrwm） 20V 电路正常工作时，二极管反向偏置的最大安全电压（超过则导通防护） 击穿电压（BV） 24.5V 浪涌触发时，二极管反向击穿的起始电压（快速从截止转为导通） 钳位电压（Vc） 32.4V 浪涌峰值时，二极管将电路电压钳制的最高值（保护后端器件不被过压损坏） 峰值脉冲电流（Ipp） 6.2A@10/1000μs 标准浪涌波形（10μs上升/1000μs下降）下，可承受的最大脉冲电流 峰值脉冲功率（Ppp） 200W@10/1000μs 浪涌峰值时的最大功率（电流×钳位电压，约6.2A×32.4V≈200W） 反向漏电流（Ir） 1μA 正常工作时反向漏电流极小，不影响电路功耗，延长电池/后端器件寿命 工作温度范围 -55℃~+150℃ 覆盖工业、汽车等极端温度场景（如车间高温、车载低温环境）三、典型应用场景
SMF20A的小封装、宽温特性使其适配多种防护需求，核心应用场景包括：
- 消费电子：手机/平板的充电口、数据接口（USB、Type-C）防护，适配紧凑内部空间；
- 工业控制：PLC输入输出端口、传感器（如温度/压力传感器）的浪涌防护，宽温适应车间环境；
- 汽车电子：车载USB接口、仪表盘传感器的防护（工作温度满足车载-40℃~+125℃需求）；
- 通信设备：路由器、交换机的以太网接口、电源模块的静电/浪涌防护；
- 电源模块：12V/18V开关电源的输出端防护，避免负载端过压损坏。
四、产品优势特点
SMF20A在同类TVS中具备明显竞争力，核心优势如下：
- 小封装高集成：SOD-123FL封装节省PCB空间，适合高密度设计（如便携设备、小型电路板）；
- 宽温可靠性：-55℃+150℃工作范围，远超普通TVS（多为-40℃+85℃），适应极端环境；
- 低漏电流设计：1μA反向漏电流，正常工作时几乎不耗电，不影响电路效率；
- 快速响应速度：TVS典型响应时间为ns级（比压敏电阻快10~100倍），能瞬间抑制快速浪涌；
- 参数一致性好：晶导微电子的工艺保障批量生产时参数波动小，可靠性稳定。
五、选型参考要点
选择SMF20A时需注意以下匹配逻辑：
- 电压匹配：后端电路正常工作电压需低于Vrwm（20V），如12V、18V电路适配；若电路为24V，需升级至SMF24A；
- 浪涌能量匹配：若单次浪涌功率超过200W，可并联2个SMF20A（功率叠加至400W）；
- 封装适配：若需插件封装（如手工焊接），可替换为1N6200系列TVS；
- 温度场景：工业/汽车等宽温场景优先选，普通消费电子（-20℃~+85℃）也可兼容。
总结
SMF20A是一款高性价比中低压TVS二极管，晶导微电子的品质保障使其在消费、工业、汽车等领域广泛应用。其小封装、宽温、低漏电流的特点，完美适配现代电子设备对防护器件“小型化、高可靠”的需求，是电路设计中浪涌防护的常用选型。
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