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CJ ST20100L
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ ST20100L
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- ST20100L
- Electronic Component
- 1
- Package
- TO-277
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.179g
- Electronic Component
- 1
- Electronic Component
- BM0226548107
- Current
- 20A
- Diode
- Electronic Component
- Current(Ir)
- 30uA@100V
- (Vf)
- 650mV@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.
ST20100L 产品概述
一、主要特点
ST20100L 是一款独立式肖特基整流二极管，CJ（江苏长电/长晶）品牌，典型工况下具备低正向压降和高速开关特性。主要参数包括：直流反向耐压 Vr = 100V，整流电流 IF(AV) = 20A，20A 时正向压降 Vf ≈ 650mV，非重复峰值浪涌电流 Ifsm = 280A，反向漏电流 Ir = 30μA（@100V），工作结温范围 -55℃ ~ +150℃。封装为 TO-277，便于热管理与散热器安装。
二、电气性能要点
- 低压降：20A 时 Vf 约 0.65V，可显著降低导通损耗，适合高电流整流和降压后级整流用途。
- 反向特性：100V 的耐压等级适用于 12V/24V 及中低压电源系统；在高温或高电压工况下需关注漏电流增加。
- 峰值能力：280A 的非重复浪涌能力适合吸收器件开机或瞬态冲击，但仅限短脉冲，不能作为持续过流使用依据。
- 开关速度：肖特基结结构使得反向恢复时间极短，适合高频开关电源和续流场合。
三、热设计与功耗计算
在额定整流电流 20A 下，器件功耗约 P = IF × Vf = 20A × 0.65V = 13W。要保证结温不超过允许上限，必须做好散热设计。常用热模型： Tj = Ta + Pd × RθJA（无散热器）或 Tj = Ta + Pd × (RθJC + RθCS + RθSA)（带散热器）。 由于数据手册中未给出 Rθ 值，建议在设计时采用外部散热器或将 TO-277 固定到良好散热的金属片/散热器，并通过铜箔加宽、打通热流孔（thermal vias）降低热阻。对连续大电流场合应进行结温仿真与实测。
四、典型应用场景
- 开关电源次级整流、降压稳压器输出整流。
- 电机驱动与电源反向保护、输入整流、反向电流保护。
- 高频逆变器与点焊/焊接电源的续流或箝位电路。
- 需低导通损耗且耐中等电压的工业与通信电源。
五、封装与安装建议
TO-277 封装便于螺丝固定到散热器，安装时请使用绝缘垫或绝缘螺丝（如需要电气隔离），并配合导热硅脂提高热阻接触性能。引脚与引线应尽量短且宽，PCB 上使用大面积铜箔并配合多层过孔散热，减少温升。
六、可靠性与注意事项
- 反向漏电流会随温度上升而显著增加，在高温或高逆压下需评估漏电对电路的影响。
- Ifsm 为非重复峰值，应避免重复或长时间浪涌，必要时加限流或熔断保护。
- 安装与焊接时遵循厂商温度与力矩规范，最终使用前参考 CJ 官方数据手册确认机械尺寸、引脚排列及规范参数。
总结：ST20100L 在 100V/20A 的电压电流等级上，凭借低 Vf 和快恢复的肖特基特性，适用于需要高效率整流和快速切换的电源应用。设计时以热管理和浪涌保护为重点，配合合理的 PCB 与散热方案即可获得稳定、长寿命的工作表现。
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