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CJ ST2045L
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ ST2045L
- Type
- CJ
- Minimum package
- 5000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- ST2045L
- Electronic Component
- 1
- Package
- TO-277
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.18g
- Electronic Component
- 1
- Electronic Component
- BM0230879364
- Current
- 20A
- Diode
- Electronic Component
- Current(Ir)
- 30uA@45V
- (Vf)
- 470mV@20A
- Electronic Component
- 55℃~+150℃
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ST2045L 产品概述
一、产品简介
ST2045L 是 CJ（江苏长电/长晶）出品的一款独立式肖特基整流二极管，封装为 TO-277。该器件针对中大电流、低压降整流场合设计，典型正向压降仅为 470mV（在 20A 条件下），直流整流电流 20A，非重复峰值浪涌电流（Ifsm）高达 280A，反向耐压 45V，适合作为低损耗、高效率的功率整流元件使用。
二、主要电气参数
- 二极管类型：肖特基（Schottky），独立式封装
- 正向压降（Vf）：约 470mV @ If = 20A
- 额定整流电流：20A（DC）
- 非重复峰值浪涌电流（Ifsm）：280A
- 直流反向耐压（Vr）：45V
- 反向电流（Ir）：30μA @ 45V
- 工作结温范围：-55°C ~ +150°C
- 封装：TO-277
三、特点与优势
- 低正向压降：在大电流下仍能保持低 Vf，减少导通损耗，提升系统效率，尤其适用于降压整流与输出整流环节。
- 快速响应、低反向恢复：肖特基结构使得开关损耗小，适合开关电源与高频逆变场合。
- 高浪涌承受能力：280A 的峰值浪涌电流增强了在瞬态过载或启动时的可靠性。
- 宽温度工作范围：-55°C 至 +150°C，适应工业级应用环境。
- 小反向漏电流：45V 下 Ir 约 30μA，有利于降低待机损耗。
四、典型应用场景
- 开关电源（SMPS）输出二极管或同步整流替换
- DC-DC 转换器、降压模块输出整流
- 逆变电路、模块电源耦合与保护
- 电池充放电管理、电源反向保护
- 电机驱动电路的续流/吸收二极管
五、使用建议与布局注意事项
- 散热处理：TO-277 封装需良好热沉或 PCB 大铜箔面积，必要时配合散热片或热垫降低结温并延长寿命。
- 电流与温度降额：在高环境温度或持续高电流条件下应参考温度-电流降额曲线（datasheet），适当留裕量。
- 布线与焊接：输入/输出走大宽铜带并采用多层接地平面，通过热过孔将热量传导到另一面以提高散热效率。
- 反向漏电随温升上升：在高温工作点注意漏电增加带来的影响，关键电路应考虑额外的保护或滤波。
- 浪涌防护：虽然 Ifsm 较高，但仍建议在有大量浪涌可能的系统中加入限流或缓启动电路以保护器件。
六、采购与替代
ST2045L 由 CJ（江苏长电/长晶）生产，封装 TO-277，适用于需要中大电流、低 Vf 的整流场合。选型时如需更高耐压或更低 Vf，可考虑电压等级或不同封装的肖特基器件；若对反向耐压要求更高，需选择额定 Vr 更高的型号。
如需更多详细电气特性曲线（Vf‑If、Ir‑Vr、热阻、降额曲线）及封装机械图，请参考厂商完整 datasheet，以确保在具体方案中得到正确应用和可靠性保障。
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