WMSIC Electronic Components

cjiang FNR4020S6R8MT

ModelFNR4020S6R8MT
PackageSMD
Brandcjiang
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
cjiang FNR4020S6R8MT
Type
CJIANG
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJIANG
Electronic Component
FNR4020S6R8MT
Electronic Component
1
Package
SMD
Type
Magnetic Display Inductor
Electronic Component
Power Inductor
Electronic Component
±20%
Electronic Component
0.245g
Inductor
6.8uH
Electronic Component
1
Electronic Component
BM0264754159
Current
1.6A
Resistor(DCR)
163mΩ
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.

FNR4020S6R8MT 产品概述

一、规格与主要参数

FNR4020S6R8MT 为长江微电(cjiang)出品的一款功率屏蔽贴片电感,主要参数如下:标称电感值 6.8 µH(公差 ±20%);额定直流电流 Irated = 1.6 A;饱和电流 Isat = 2.4 A;直流电阻 DCR = 163 mΩ;封装形式 SMD,外形尺寸约 4.0 × 4.0 mm。器件类型为磁胶屏蔽电感,适用于开关电源及点对点电源滤波等对体积与电流能力有要求的场合。

二、电气特性说明

  • 电感值与直流偏置:6.8 µH 属于中等量级的功率电感,注意在直流偏置情况下电感值会随电流下降(磁芯部分进入磁饱和),Isat 为 2.4 A 时电感会显著下降,应避免长期在此电流附近工作。
  • 损耗与压降:在额定电流 1.6 A 下,器件的直流损耗约为 I^2·DCR ≈ 0.417 W,直流压降约为 I·DCR ≈ 0.26 V。该损耗会引起器件温升,设计时须预留散热空间与PCB散热路径。
  • 公差与一致性:±20% 的电感公差为功率型电感的常见规格,适合对精确电感值要求不苛刻且关注电流能力与体积的电源模块。

三、结构与封装优势

该款采用磁胶屏蔽结构,能有效抑制磁通外泄,降低对周边敏感电路的干扰,适合高密度贴片化布局。4×4 mm 的SMD封装兼顾空间利用与电流承载能力,支持常规回流焊工艺,便于自动化贴装与大规模生产。

四、典型应用场景

  • 开关稳压器(尤其是升降压或降压拓扑)的电感元件(点对点电源)
  • 电源滤波与输入/输出电感,用于抑制高频纹波和改善环路性能
  • 嵌入式设备、通信设备、便携式电源模块及工业控制模块的电源管理部分

五、选型与布局建议

  • 电流裕量:实际选型建议以实际纹波电流与瞬时峰值为准,尽量使工作电流低于额定电流以避免过早饱和或过高温升。
  • 热管理:因为在额定电流下功耗接近 0.4 W,应在PCB上通过加大铜箔面积或热过孔改善散热,并避免将电感与高温器件紧密排列。
  • 布局:将电感放置在开关管与负载之间的合适位置,缩短关键回路(例如开关节点)走线,减小环路面积以降低辐射与寄生。输入/输出滤波时注意与电容的配合,确保稳定性。
  • 测试验证:在样机阶段进行直流偏置下的电感测量、温升测试以及开关频率下的纹波电流验证,确认符合系统效率与热指标。

总结:FNR4020S6R8MT(6.8 µH,1.6 A,Isat 2.4 A,DCR 163 mΩ,4×4 mm)是面向中等电流、空间受限电源应用的屏蔽功率电感,具有体积小、屏蔽性能好、适配SMT工艺等优点。用户在设计时需关注直流偏置下的电感衰减、器件功耗与散热布板,以保证长期可靠运行。

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