Model & package intelligence
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BOURNS SRN5040-4R7M
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- BOURNS SRN5040-4R7M
- Type
- BOURNS
- Unit
- Electronic Component
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- BOURNS
- Electronic Component
- SRN5040-4R7M
- Electronic Component
- 1
- Package
- Electronic Component
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.65g
- Inductor
- 4.7uH
- Electronic Component
- 1
- Electronic Component
- BM0264532940
- Current
- 3.1A
- Resistor(DCR)
- 35mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 1000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SRN5040-4R7M 产品概述
一、概述
SRN5040-4R7M 是 BOURNS 提供的一款功率贴片电感，标称电感值 4.7 µH，公差 ±20%，适用于中小功率电源滤波与存储能量场合。器件尺寸为 5×5 mm（SMD 封装，厂商标注为非标准封装），额定电流 3.1 A，饱和电流（Isat）3.3 A，直流电阻（DCR）约 35 mΩ，针对空间受限且要求较高电流能力的电源设计而优化。
二、主要特点
- 电感值：4.7 µH，公差 ±20%，适用于开关稳压器输出滤波或输入去耦。
- 电流能力：额定电流 3.1 A，饱和电流 3.3 A（Isat 的定义及具体测试条件请参见厂家数据表）。
- 低 DCR：约 35 mΩ，能减少直流损耗，提高转换效率。
- SMD 封装（5×5 mm），便于自动贴装与高密度 PCB 布局。
- 品牌：BOURNS，质量与可靠性有保障（具体环境与认证信息请以厂商资料为准）。
三、电气与热性能考量
- 损耗估算：在额定电流 3.1 A 下，直流功耗约为 P = I²·R ≈ 0.337 W；接近饱和电流时（3.3 A），损耗约 0.38 W。长期工作时需考虑温升与散热路径。
- 饱和裕量较小：Isat 仅比额定电流高 0.2 A，设计时应留有充足裕量或选择更高电流等级器件以避免磁饱和导致电感量剧降。
- 交流损耗与纹波电流：实际损耗还受交流磁滞和涡流损耗影响，纹波电流大小会显著影响温升与效率，建议在选型时参考厂方频率相关曲线。
四、典型应用场景
- 升降压开关稳压器（buck/boost）输出滤波电感。
- 电源输入滤波与电磁兼容（EMC）抑制。
- LED 驱动、电机驱动及工业控制电源。
- 汽车电子与便携式设备（需验证工作温度与汽车级规范）。
五、封装与布局建议
- PCB 布局：电感应尽量靠近开关器件和输出电容，连接导线应尽量短、宽，采用大铜面积或过孔过多的散热策略以降低温升。
- 回流焊接：遵循 BOURNS 的回流曲线与存储、湿度控制说明，避免超过器件的最大焊接温度。
- 机械固定：5×5 mm 小型封装易受机械应力影响，贴片过程中注意避免翻转和碰撞。
六、选型与注意事项
- 若系统纹波电流或短路/启动冲击电流接近或超过 3.1–3.3 A，应考虑降额使用或选用更高电流等级的电感。
- ±20% 的电感公差在高精度滤波回路中可能影响输出性能，必要时可选用公差更小的型号或通过电路补偿。
- 详细参数（如频率特性、饱和定义、温度系数、封装高度、回流焊曲线、可靠性测试）请以 BOURNS 官方数据手册为准。
若需更详细的电气特性曲线、尺寸图或订购信息，我可以帮您查找或整理厂商数据表的关键内容。
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