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CJ BAS40-04 BAS40
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ BAS40-04
- Type
- CJ
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- BAS40-04
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.033g
- Electronic Component
- 1
- Electronic Component
- BM0230578333
- Current
- 200mA
- Diode
- 1
- (Vf)
- 1V@40mA
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- Voltage Rating(Vr)
- 40V
- Surge Current (Ifsm)
- 200mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BAS40-04 44 SOT-23 肖特基二极管 — 产品概述
一、产品简介
BAS40-04（CJ，封装 SOT-23）是一款小功率肖特基二极管，适合用于小信号整流、保护与电平传输场合。肖特基结构使其具有较低的正向压降和快速恢复特性，适合便携设备与高频开关环境中的低压差整流与浪涌保护。
二、主要参数
- 正向压降 Vf：1.0 V @ If = 40 mA
- 直流反向耐压 Vr：40 V
- 最大整流电流（Io/If）：200 mA（连续）
- 反向电流 Ir：200 mA（请参照具体测试条件确认数值）
- 非重复峰值浪涌电流 Ifsm：200 mA
- 封装：SOT-23，品牌：CJ（江苏长电/长晶）
三、典型特性与优势
- 低正向压降：在中小电流下（如 40 mA）保持约 1 V 的压降，有助于降低功耗与温升。
- 快速开关、无恢复时间：肖特基二极管固有的快速响应，适合高频整流与快速脉冲信号路径。
- 小体积封装：SOT-23 适合空间受限的电路板布局，便于表面贴装自动化生产。
- 合理的耐压与浪涌能力：40 V 的反向耐压覆盖常见低压系统，200 mA 的峰值浪涌能力可应对瞬时冲击。
四、典型应用
- 便携式电源与充电器的小信号整流与防反接保护
- 二进制电平移位、检波与探测电路
- 电源轨的反向保护与肖特基 ORing（在低电流场合）
- 小型开关电源的输出整流或者同步整流辅助元件
- 脉冲保护与浪涌钳位（注意额定浪涌电流限制）
五、热设计与使用建议
- 功率耗散估算：功耗约 P = If × Vf。以 40 mA、Vf = 1.0 V 为例，P ≈ 40 mW，SOT-23 在此功耗下散热裕度较大；若工作电流靠近 200 mA，应关注温升与 Vf 上升带来的额外功耗。
- PCB 散热：建议在封装焊盘周围保留适量铜箔以提升散热能力，必要时通过多层铜线或过孔扩展热流。
- 反向漏电与温度：肖特基器件的反向漏电随温度上升会显著增加，若电路对漏电敏感，需在高温工况下验证 Ir。
- 并联使用谨慎：因 Vf 与温度系数差异，并联多个小器件并非理想做法，建议使用单只额定元件或采用有源均流措施。
六、选型注意事项
- 确认反向耐压大于系统最大电压，留有适当安全裕度。
- 核实反向电流 Ir 的测试条件与温度（若数值较大，可能影响高温下的漏电表现）。
- 若需更低正向压降或更高电流能力，可考虑大封装或专用同步整流器件。
- 采购时核对 CJ 的器件标识及封装版本，避免混淆不同子型号与封装脚位。
总结：BAS40-04（CJ，SOT-23）为一款适用于低至中等电流、小体积电路的肖特基二极管，凭借较低的正向压降与快速特性，适合便携电源、整流与保护应用。在设计时应关注热管理、反向漏电特性与实际工作电流的适配，必要时参考厂家完整数据手册以获得更详细的电气与热性能曲线。
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