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Littelfuse SMF18A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- Littelfuse SMF18A
- Type
- LITTELFUSE
- Unit
- Electronic Component
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- SMF18A
- Electronic Component
- 1
- Package
- SOD-123FL
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.034g
- Electronic Component
- 1
- Electronic Component
- BM0046469253
- Operating Temperature
- 65℃~+150℃
- Voltage
- 29.2V
- Electronic Component
- IEC 61000-4-4；IEC 61000-4-2
- Current(Ir)
- 1uA
- Voltage(VBR)
- 20V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMF18A 产品概述
一、产品简介
SMF18A是一款高性能的瞬态电压抑制器（TVS二极管），由美国力特（Littelfuse）公司生产，具有出色的过压保护特性和反向击穿性能。该器件专为电源线路和信号线路的过压保护设计，广泛应用于电子设备的保护电路中。在现代电子产品中，瞬态电压抑制器扮演着重要角色，能够有效防止由静电放电（ESD）、雷击或电气噪声引起的瞬态过压，确保设备的安全和可靠性。
二、技术规格
SMF18A具有以下主要技术参数：
- 类型：齐纳二极管
- 单向通道：1
- 电压 - 反向断态（典型值）：18V
- 电压 - 击穿（最小值）：20V
- 不同Ipp时电压 - 箝位（最大值）：29.2V
- 电流 - 峰值脉冲（10/1000µs）：6.8A
- 功率 - 峰值脉冲：200W
- 电源线路保护：无
- 应用：通用
- 工作温度范围：-55°C ~ 150°C（TJ）
- 安装类型：表面贴装型
- 封装/外壳：SOD-123F
三、电气特性分析
SMF18A的设计使其能够在极端条件下稳定运行。反向断态电压的典型值为18V，而最小击穿电压为20V，确保在高于此电压的瞬态情况下，器件能够快速反应并钳位过压，保护后端电路。该器件在应用中的反向电压钳位最大值达29.2V，确保不会对下游元器件造成损害。
SMF18A的最大峰值脉冲电流为6.8A，而其峰值脉冲功率达到200W，极大地提高了设备在面临短时间高能量脉冲时的保护能力。这样的电气特性，特别适合用于不确定性高的环境中，如工业自动化、通讯设备等应用场合。
四、工作环境
该器件的工作温度范围广泛，从极低温度的-55°C到高达150°C，使其适用于不同工作环境中。针对极端工作温度的设计，保证了SMF18A可在航空航天、汽车及高温工业设备等多种应用中可靠工作。
五、封装与安装
SMF18A采用SOD-123F表面贴装封装，体积小巧，有助于节省PCB布局空间。同时，表面贴装型的设计使其更容易与现代自动化制造工艺兼容，提升了生产效率。SOD-123F封装还具有良好的散热性能，能够有效降低器件在工作过程中的温升。
六、应用场景
SMF18A广泛应用于各种电子设备中，包括但不限于：
- 消费电子产品（如智能手机、平板电脑等）
- 计算机及其周边设备（如打印机、外部存储设备等）
- 通讯设备（如路由器、基站等）
- 工业设备及自动化控制系统
- 汽车电子（如车载导航、传感器等）
七、总结
综上所述，SMF18A作为一款高效的TVS二极管，凭借其优秀的电气特性、广泛的工作环境适应性及便捷的表面贴装封装，已成为许多应用场合理想的选择。选择SMF18A有助于有效保护电子设备免受瞬态电压影响，延长设备的使用寿命和可靠性。对于需要高性能过压保护的设计工程师来说，SMF18A是一个值得优先考虑的方案。
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