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cjiang FNR5020S3R0NT
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR5020S3R0NT
- Type
- CJIANG
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR5020S3R0NT
- Electronic Component
- 1
- Package
- SMD
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±30%
- Electronic Component
- 0.181g
- Inductor
- 3uH
- Electronic Component
- 1
- Electronic Component
- BM0264590586
- Current
- 2.9A
- Resistor(DCR)
- 49mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
FNR5020S3R0NT 产品概述
一、产品简介
FNR5020S3R0NT 是长江微电（cjiang）推出的一款功率用磁胶屏蔽贴片电感，额定电感值为 3 μH，公差 ±30%。器件采用 5×5 mm SMD 封装，面向开关电源与电源滤波场景设计，兼顾较高额定电流与较低直流电阻，适合空间受限的中小功率电源应用。
二、主要性能参数
- 电感值：3 μH（±30%）
- 额定电流：2.9 A（连续载流能力）
- 饱和电流 Isat：2.8 A（通常定义为电感下降到标称值一定比例时的电流）
- 直流电阻 DCR：约 49 mΩ
- 类型：磁胶屏蔽电感（磁体包胶并屏蔽）
- 封装：SMD，外形尺寸 5×5 mm
由上述参数可估算器件在额定电流下的直流损耗：P = I^2·DCR ≈ 2.9^2 × 0.049 ≈ 0.41 W。该损耗对应的温升与实际 PCB 散热条件和工作环境强相关，应在设计时充分考虑散热与降额 。
三、结构与封装特点
FNR5020S3R0NT 采用磁胶包覆与屏蔽结构，有利于减小绕组辐射并提高抗干扰能力；5×5 mm 的贴片封装便于自动化贴装与高密度布板。磁胶封装在机械强度和振动耐受性上也比裸磁环有所改进，但具体焊接温度曲线及回流要求请参照厂方完整资料。
四、典型应用场景
- 开关稳压器（降压/升压）电感
- 电源输入/输出滤波器
- LED 驱动电源与车载电子电源
- USB PD、快充、电源模块与点对点供电系统
五、选型与使用建议
- 电流选型：建议在额定电流 2.9 A 以下使用，并尽量保持工作电流低于 Isat 以避免电感显著下降。对于长期高温或连续大电流场合应适当降额（例如留 10–20% 余量）。
- 温升与散热：按上述直流损耗估算，在实际布局中应提供良好散热路径（铜箔面积、过孔散热等），以控制线圈温升和长期可靠性。
- 电感公差 ±30% 适合电源滤波与能量储存场合，但对精密谐振或时序敏感电路需注意配合电路调整。
六、焊接与储存建议
- 按通用 SMD 回流焊曲线进行焊接，避免超过制造商推荐的峰值温度与暴露时间，防止磁胶材料老化。
- 储存环境建议干燥、避免阳光直射和强酸碱气体，长期储存前请参照包装防潮要求。
七、可靠性与测试建议
- 在样机阶段建议进行热测试、温升评估与长期老化测试（高温烘箱、循环温度）以验证在目标系统中的表现。
- 关注电感在大电流下的 V–I 特性和饱和特性，测量实际工作点下的电感值及损耗以便准确热设计。
八、注意事项
- 本型号电感公差较宽（±30%），若电路对电感精度敏感应考虑筛选或使用更高精度型号。
- 参考具体应用场景（工作频率、纹波电流、峰值电流等）选择电感值与电流等级，必要时与厂方沟通获取更详尽的频率特性、热阻与推荐 PCB 垫片/焊盘资料。
如需器件频率响应（阻抗/自谐频率）、精确封装尺寸图或回流焊曲线等详细资料，可联系长江微电获取完整数据手册与参考设计。
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