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MSKSEMI SB2045L
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MSKSEMI SB2045L
- Type
- MSKSEMI
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MSKSEMI
- Electronic Component
- SB2045L
- Electronic Component
- 1
- Package
- TO-277
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.199g
- Electronic Component
- 1
- Electronic Component
- BM0225936532
- Current
- 20A
- Diode
- 1
- Current(Ir)
- 300uA@45V
- (Vf)
- 520mV@20A
- Electronic Component
- 65℃~+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.
SB2045L 产品概述
一、产品简介
SB2045L 是美森科（MSKSEMI）推出的一款高电流肖特基整流二极管，额定反向耐压45V，额定整流电流20A，封装为 TO-277 适合中低压、大电流的整流与保护场合。肖特基结结构保证了较低的正向压降与极快的开关响应，适合开关电源、DC-DC 转换、整流及反向保护等应用。
二、主要电气参数
- 正向压降 (Vf)：约 520mV @ 20A
- 直流反向耐压 (Vr)：45V
- 额定整流电流：20A（连续）
- 反向电流 (Ir)：300µA @ 45V
- 非重复峰值浪涌电流 (Ifsm)：200A（单次浪涌能力）
- 工作结温范围：-65°C ~ +150°C
三、性能特点与意义
- 低正向压降：Vf ≈ 0.52V 在高电流下减少整流损耗，相比普通 PN 结可降低功耗与发热。
- 快速响应、无明显反向恢复：肖特基二极管在高频开关系统中更能降低开关损耗与电磁干扰。
- 较强的浪涌能力：200A 的非重复峰值浪涌能力能承受启动或短时过载脉冲。
- 宽温度范围：-65°C 至 +150°C，适应苛刻环境，适用范围广。
四、热管理与功耗计算
在满载 20A 条件下，近似功耗 P = Vf × I ≈ 0.52V × 20A = 10.4W。此功率在 TO-277 封装下需要良好散热措施：
- 采用金属散热片或将器件固定在带散热片的金属基座；
- 如用于 PCB 散热，应配大面积铜箔并配多孔热过孔以降低结壳热阻；
- 注意反向泄漏随温度上升而增加，长期高温工作需适当降额。
五、典型应用场景
- 开关电源与整流器的输出整流；
- DC-DC 降压变换器的续流/钳位二极管；
- 电池组与电源路径的反向极性保护；
- 车载 12V/24V 系统的高电流整流（需确认峰值电压环境）；
- 工业电源、UPS 和充电设备等需要高连续电流和低压降的场合。
六、选型与使用建议
- 若工作电压接近或超过 45V，应选择更高 Vr 等级的型号；
- 在大电流连续工作时应按实际应用进行热仿真并预留安全降额（建议额定电流下配合额外散热或按 70–80% 降额使用以提升寿命）；
- 关注反向泄漏在高温下的增长，若高温环境或高阻抗回路对泄漏敏感，需评估其影响；
- 在高速开关场合，可结合适当的滤波/缓冲电路减少电磁干扰。
七、机械与封装说明
TO-277 封装便于安装在散热片或金属底座上，安装时注意绝缘要求和热界面材料的使用。具体尺寸、引脚排列及装配细节请参阅厂商完整数据手册。
八、结语
SB2045L 以其 45V/20A 的规格、低正向压降、良好的浪涌能力和宽温度适应性，适合中低压高电流整流与保护场合。为确保器件在系统中的长期可靠运行，建议结合实际热设计与工作环境进行选型与布局，并参考厂商完整规格书获取更详细的电气与热参数。若需器件的完整数据手册或样品信息，可联系 MSKSEMI（美森科）或授权分销渠道。
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