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MDD SL54F
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SL54F
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- SL54F
- Electronic Component
- 1
- Package
- SMAF
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.056g
- Electronic Component
- 1
- Electronic Component
- BM0230826881
- Current
- 5A
- Diode
- Electronic Component
- Current(Ir)
- 1mA@40V
- (Vf)
- 450mV@5A
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- Voltage Rating(Vr)
- 40V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SL54F 产品概述
一、概述
SL54F 是MDD出品的一款独立式肖特基二极管，额定整流电流5A，直流反向耐压40V，正向压降典型值为0.45V（在5A时）。器件采用SMAF表面贴装封装，适用于对效率和开关损耗有较高要求的电源整流与保护场合。
二、主要特点
- 低正向压降：Vf = 0.45V @ 5A，有利于降低导通损耗与发热。
- 中等耐压：Vr = 40V，适合5V/12V/24V类电源及输入整流应用。
- 合理的额定电流：直流整流电流If(AV) = 5A，适用于中大功率整流。
- 反向漏电：Ir = 1mA @ 40V，需在高温或高阻抗回路中注意漏电影响。
- 封装：SMAF，表面贴装、自动化装配友好。
三、典型电气参数（关键值）
- 正向压降：0.45V @ 5A
- 直流反向耐压：40V
- 整流电流：5A（持续）
- 反向漏电流：1mA @ 40V
四、典型应用场景
- 开关电源次级整流（同步替代或自由并联使用）
- DC-DC转换器输出整流与二次整流
- 反向极性保护与低压差稳压电路
- 充电器、适配器、汽车电子（低压系统）等中功率场合
五、热管理与布局建议
SMAF 封装热阻相对中等，长期5A工作时需保证良好散热：在PCB上增加焊盘铜箔面积、连通底层散热铜箔或通过热孔传导至散热层；布局时靠近散热源或沿热流路径布置。此外，肖特基二极管的反向漏电随温度上升快速增加，设计时应留有温升余量并考虑电流降额。
六、设计注意事项
- 反向漏电较大时（Ir=1mA@40V），在高阻抗或待机功耗敏感电路需评估泄漏影响；必要时选择更低漏电产品或并联/串联方案。
- 用于脉冲或瞬态大电流场合时，关注封装的脉冲电流能力与热时程，避免超出峰值能力。
- 与标准硅整流器比较，肖特基具有更低正向压降和快速响应，但逆向耐压与漏电特性需综合考量。
七、可靠性与检验建议
采购和验收时建议查看MDD的完整数据手册，关注器件的焊接温度曲线、热循环与过流保护测试结果。生产过程中遵循回流焊工艺规范，避免长时间高温暴露导致特性漂移。
八、选型与替代
SL54F 适用于需兼顾低损耗与中等耐压、5A级别整流的电源方案。若目标电路对漏电敏感，可考虑漏电更小的肖特基或采用反向并联/使用栅控MOSFET做理想二极管替代；若需要更高耐压，则选择更高Vr等级的型号。
总结：SL54F（MDD，SMAF）以其0.45V@5A的低压降和40V耐压，适合多种中功率整流与保护场景，但在高温或低功耗待机设计中应关注其反向漏电特性，配合合理PCB散热设计可获得稳定可靠的使用表现。
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