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RUILON SMFJ18A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RUILON SMFJ18A
- Type
- RUILON
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- RUILON
- Electronic Component
- SMFJ18A
- 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
- BM0257712408
- Operating Temperature
- 55℃~+155℃
- Voltage
- 29.2V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 20V
- 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.
SMFJ18A 产品概述
一、产品简介
SMFJ18A 是瑞隆源（RUILON）推出的一款单向瞬态抑制二极管（TVS），用于保护敏感电子电路免受瞬态过电压冲击。该型号专为汽车电子、通信设备、电源模块及工业控制等场景设计，具有响应速度快、钳位能力强和工作温度范围宽等优点。校验通过!
二、主要电气参数
- 极性：单向（适用于直流线路保护）
- 反向截止电压 Vrwm：18 V
- 击穿电压（典型）：20 V
- 钳位电压（Ipp 情况）：29.2 V
- 峰值脉冲电流 Ipp：6.8 A（10/1000 µs 或厂方规定脉冲条件下）
- 峰值脉冲功率 Ppp：200 W（单次脉冲能量能力表征）
- 反向漏电流 Ir：≤1 µA（在 Vrwm 条件下）
- 工作温度范围：-55 ℃ ~ +155 ℃
- 封装：SOD-123FL（表面贴装，小型化）
三、典型特性与优势
- 抑制高能瞬态：200 W 的峰值脉冲功率配合 6.8 A 的脉冲电流能力，能有效吸收来自雷击、开关瞬变或感性负载断开产生的短时高能量冲击。
- 低漏电与稳定阈值：≤1 µA 的反向电流有利于在待机或敏感测量电路中维持低功耗，同时 18 V 的工作电压和 ~20 V 的击穿点保证了稳健的触发特性。
- 宽温度适应性：工作温度覆盖 -55 ℃ 至 +155 ℃，适合汽车和工业级应用对高温可靠性的要求。
- 小型 SOD-123FL 封装：占板面积小，便于自动化贴装与密集布局，同时具备良好的热散和机械强度。
四、典型应用场景
- 汽车电子总线与传感器保护（如车载通讯、CAN 总线输入端）
- 电源输入与DC-DC模块防护
- 通信设备射频/低频线路过压防护
- 工业控制器、继电器驱动及传感器前端保护
五、选型与注意事项
- 确认脉冲波形：Ipp、Ppp 参数通常基于特定脉冲波形（如 IEC 标准或厂方说明），选型时应与实际浪涌特性匹配。
- 考虑钳位电压：29.2 V 的钳位电压适用于对后级耐压有一定裕度的设计，若后级器件耐压较低需选用更低钳位的型号或增加串联元件。
- 热管理与布局：尽量将 TVS 靠近保护点焊接，减少走线感抗；大能量冲击场合需评估PCB散热与多个元件并联方案。
- 环境与可靠性：用于高湿或盐雾环境时应参考封装可靠性及厂家加固工艺建议。
结语：SMFJ18A 在体积与防护能力之间达成良好平衡，适合需要中等能量瞬态保护且对运行温度与漏电要求较高的场合。若需替代品或更高能量版本，可根据系统工作电压、最大允许钳位及能量吸收要求进一步选择。
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