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cjiang FNR3012S4R7MT
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR3012S4R7MT
- Type
- CJIANG
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR3012S4R7MT
- Electronic Component
- 1
- Package
- SMD,3x3mm
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.068g
- Inductor
- 4.7uH
- Electronic Component
- 1
- Electronic Component
- BM0233317975
- Current
- 1.3A
- Resistor(DCR)
- 156mΩ
- 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.
FNR3012S4R7MT 产品概述
一、产品简介
FNR3012S4R7MT 是长江微电（cjiang）推出的一款表面贴装磁胶屏蔽功率电感，封装为 3.0 x 3.0 mm（SMD）。标称电感值 4.7 µH，公差 ±20%，面向中低功率开关电源与电磁兼容要求较高的便携式应用场景。
二、主要电气参数
- 电感值：4.7 µH（±20%）
- 额定电流：1.3 A（额定热电流，指在允许温升条件下的连续负载能力）
- 饱和电流 Isat：1.0 A（接近或超过该电流时电感量将明显下降）
- 直流电阻 DCR：156 mΩ（影响导通损耗与转换效率）
- 类型：磁胶屏蔽结构，抑制磁通外泄，利于 EMI 控制
举例损耗计算：在 1.0 A 下的铜损约为 I²·R = 1.0²×0.156 ≈ 0.156 W；在额定 1.3 A 下铜损约为 1.3²×0.156 ≈ 0.264 W，需要结合散热条件评估系统温升。
三、结构与特性
磁胶屏蔽结构兼顾磁通封闭与机械稳固，减少对周围器件的磁干扰并提升外部抗扰性。3×3mm 的紧凑封装适合高密度贴装板设计，支持标准回流焊工艺，适配自动化生产线。
四、典型应用场景
- 移动设备、平板、笔记本等便携式电源模块
- DC-DC 降压转换器、PMIC 前端滤波与储能元件
- LED 驱动、摄像模组电源滤波
- 电池管理与便携式充电器、物联网终端电源部分
五、选型与使用建议
- 注意 Isat 与额定电流的区别：若工作电流接近或超过 Isat，会导致电感值下降，从而影响输出纹波与稳压性能，建议在设计中对峰值与纹波电流进行降额留有裕量。
- DCR 对效率影响显著，若对效率要求高，应在系统热设计和电流环路中考虑功耗分布与散热方式。
- ±20% 的容差适用于对电感精度要求不敏感的电源滤波和储能场景；若对稳定性要求更高，可考虑容差更窄的型号或在电路中增加补偿。
- 推荐在 PCB 布局时靠近开关元件放置，并保证输入/输出回流路径短而粗，以降低 EMI 与寄生电感。
六、包装与采购
产品型号：FNR3012S4R7MT，品牌：cjiang（长江微电）。SMD 卷带或托盘包装，适合自动贴装与回流焊流程。采购或样品评估时，请向供应商确认最新的器件数据手册、温度特性及可靠性认证资料以便完成最终设计验证。
如需基于该型号的电路建议（例如开关电源拓扑下的电感选型、纹波电流估算与热评估），可提供工作条件信息以便给出更具体的设计指导。
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