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cjiang(长江微电) FNR4030S120MT
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR4030S120MT
- Type
- CJIANG
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR4030S120MT
- Electronic Component
- 1
- Package
- SMD,4x4mm
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.338g
- Inductor
- 12uH
- Electronic Component
- 1
- Electronic Component
- BM0232023067
- Current
- 1.4A
- Resistor(DCR)
- 175mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 2000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
FNR4030S120MT 产品概述
一、产品简介
FNR4030S120MT 是长江微电（cjiang）推出的一款表面贴装功率电感，电感值 12 μH，公差 ±20%，额定电流 1.4 A，饱和电流（Isat）1.8 A，直流电阻（DCR）约 175 mΩ。器件为磁胶屏蔽结构，封装为 SMD，外形尺寸为 4 × 4 mm，面向中低功率开关电源和电源滤波应用设计。
二、主要特点
- 电感值：12 μH，适用于中等纹波滤除与能量储存。
- 电流能力：额定电流 1.4 A，饱和电流 1.8 A，可满足多数小型降压转换器瞬态需求。
- 低频率损耗与屏蔽设计：磁胶屏蔽结构降低磁通泄漏，改善 EMI 性能，便于密集布板。
- 小型封装：4×4 mm SMD，适合集成度较高的 PCB 布局，节省空间。
- DCR 约 175 mΩ，兼顾效率与体积，适用于电流不极高的应用场合。
三、典型应用
- 同步/非同步降压转换器（Buck）滤波与储能元件；
- 嵌入式电源模块、便携设备电源；
- LED 驱动电源、传感器与 IoT 终端电源滤波；
- 各类 DC-DC 电源管理芯片外围无源件。
四、设计与选型要点
- 电流裕量：设计中应以实际工作电流与纹波电流为准，额定电流为长时间允许电流（温升限制），饱和电流为防止电感值骤降的瞬时上限，建议在实际最大电流下验证电感饱和特性。
- 损耗与效率：DCR 越低有利于提升效率，但通常会带来体积或成本权衡；若需更高效率可选低 DCR 型号或并联方案（需评估散热与匹配）。
- 温升与热管理：器件热阻与 PCB 铜箔面积、过孔散热相关，必要时增大焊盘铜箔和散热 vias 以降低温升。具体温度与电流特性请参照厂家典型曲线。
五、PCB 布局建议
- 电感应靠近开关器件或负载放置，最小化开关回路面积；
- 两端焊盘采用足够铜箔，必要时增加过孔通热；
- 避免高频高电流回路旁放置敏感模拟信号，利用屏蔽特性进一步抑制干扰。
六、可靠性与测试
- 建议按厂家提供的测量条件（典型为 100 kHz、规定激励电压）确认标称电感值；
- 出货前进行温升、饱和特性和耐焊接（回流）测试；
- 长期工作环境下注意高温及潮湿对性能的影响，必要时做老化验证。
总结：FNR4030S120MT 在 4×4 mm 的小型化封装中提供 12 μH 的储能能力与良好的磁屏蔽性能，适合中低功率 DC-DC 和滤波场景。最终选型与可靠性验证应结合实际工作电流、纹波和系统热条件，参考厂家完整规格书及典型曲线进行确认。
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