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cjiang FNR8040S470MT
Configuration
1 options
Configuration
Electronic Component
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR8040S470MT
- Type
- CJIANG
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR8040S470MT
- Electronic Component
- 1
- Package
- SMD
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 1.184g
- Inductor
- 47uH
- Electronic Component
- 1
- Electronic Component
- BM0265296131
- Current
- 1.7A
- Resistor(DCR)
- 177mΩ
- 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.
FNR8040S470MT 产品概述
一、产品简介
FNR8040S470MT 是长江微电（cjiang）推出的一款功率型贴片磁胶屏蔽电感，封装尺寸约 8×8 mm，标称电感值 47 μH，公差 ±20%。该器件为 SMD 结构，适用于开关电源、降压( buck )滤波及电源管理场合，兼顾大电流能力与体积密度。
二、主要参数
- 电感值：47 μH ±20%
- 额定电流（Irated）：1.7 A（连续工作建议）
- 饱和电流（Isat）：2.0 A（磁通下降到指定值时）
- 直流电阻（DCR）：约 177 mΩ
- 类型：磁胶屏蔽电感（屏蔽结构，抑制外泄磁场）
- 封装：SMD，8×8 mm
- 品牌：cjiang（长江微电）
三、特性与优势
- 高电感密度：在 8×8 mm 的小体积内提供 47 μH 电感值，节省 PCB 面积。
- 良好电流能力：1.7 A 连续额定，2.0 A 饱和限值，适配中小功率转换器。
- 屏蔽结构：磁胶封装有效降低对周围器件的磁干扰，便于密集布局。
- 可回流焊兼容：适合常规 SMT 工艺，便于自动化贴装与制造。
四、典型应用
- DC-DC 降压转换器（开关电源滤波/储能）
- 电池供电设备、移动电源管理模块
- 工业控制与通信电源模块
- 各类需要中等电流滤波和储能的电子设备
五、设计与焊接建议
- 布局：尽量靠近开关管或整流二极管放置，缩短高频回路长度；输入输出回路分别留宽铜箔以降低寄生电阻。
- 散热与电流路径：对 1.7 A 连续工作建议预留足够铜厚与过孔（via）用于散热及电流承载。
- 回流焊：遵循无铅回流温度曲线（最大峰值约 260°C，具体参照厂方推荐曲线），避免重复高温冲击。
- 去评级（derating）：为保证长期可靠性，建议在设计中将允许工作电流控制在额定电流的 70%~90% 范围内（视散热条件而定）。
六、注意事项与可靠性
- 饱和特性：当工作电流接近或超过 Isat（2.0 A）时，电感值会显著下降，可能引起输出纹波与电路不稳定，设计时需留裕量。
- DCR 与功耗：177 mΩ 的直流电阻在高电流下会产生显著功耗与发热，需在热设计中考虑功耗分布。
- 储存与使用：避免潮湿环境存放，贴片前若器件超过厂方规定时间应进行烘烤除湿（参照制造商存储说明）。
若需更详细的电气特性曲线、温度漂移、饱和曲线或可靠性测试报告，可向长江微电获取器件规格书与样片测试数据，以便完成最终设计验证。
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