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cjiang FNR5040S331MT
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR5040S331MT
- Type
- CJIANG
- Minimum package
- 1500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR5040S331MT
- Electronic Component
- 1
- Package
- SMD,5x5mm
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.579g
- Inductor
- 330uH
- Electronic Component
- 1
- Electronic Component
- BM0257252629
- Current
- 500mA
- Resistor(DCR)
- 2.73Ω
- Electronic Component
- Electronic Component
- Electronic Component
- 1500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
FNR5040S331MT 产品概述 — cjiang（长江微电）
一、产品简介
FNR5040S331MT 是长江微电（cjiang）推出的一款磁胶屏蔽贴片电感，规格为 330 µH（标称），封装 SMD 5×5 mm。面向中低频电源滤波、降噪和能量储存场景，适用于要求体积小、屏蔽性能好的片式电感应用。
二、主要参数
- 电感值：330 µH ±20%（实际范围约 264 µH — 396 µH）
- 额定电流：500 mA
- 饱和电流（Isat）：470 mA（电感下降到规定比例时的电流）
- 直流电阻（DCR）：2.73 Ω
- 类型：磁胶屏蔽电感（屏蔽结构，泄漏磁场小）
- 封装：SMD 5×5 mm
- 品牌：cjiang（长江微电）
三、性能要点与优劣势
- 屏蔽性好：磁胶屏蔽结构可降低对周围敏感电路的干扰，便于高密度 PCB 布局。
- 较大电感量：330 µH 适合用作低频滤波和能量储存。
- DCR 较高：2.73 Ω 在 500 mA 工作电流下损耗较大（P = I^2·R ≈ 0.68 W），会引起明显的温升和效率损失。
- 饱和电流略低于额定电流：Isat=470 mA < 额定 500 mA，实际工作时需注意电感值随电流靠近 Isat 时会明显下降。
四、使用与选型建议
- 电流余量：由于 Isat（470 mA）低于标称额定 500 mA，建议实用工作电流保持在 70–80% 以内（约 ≤350–400 mA），以保证电感值稳定与足够裕量。
- 损耗评估：若工作电流接近 500 mA，应评估功耗和散热（500 mA 时耗散约 0.68 W），如无法接受则选用更低 DCR 或更大封装/更大电流等级的器件。
- 温升与环境：高 DCR 导致的温升在封装和周围元件密集时影响可靠性，设计时应留足散热路径并考虑空气对流或铜箔散热。
- 容差影响：±20% 的电感容差在滤波器设计中需考虑最差情况（下限约 264 µH）对截止频率和滤波性能的影响。
五、PCB 封装与焊接注意
- 封装 5×5 mm，建议短而宽的电流回流走线以降低寄生电感与额外电阻。
- 屏蔽电感仍建议与敏感信号保持一定距离，并避免在其上方放置温度敏感元件。
- 焊接工艺按常规 SMD 工艺处理，回流温度和时间需参考厂商具体工艺文件（如无则按常见 260°C 回流曲线稳妥处理）。
六、典型应用场景
- DC-DC 降压/升压转换器输入/输出滤波。
- 电源模块的共模/差模滤波与去耦。
- 便携设备和工业电源中对体积、屏蔽和电感量有要求的滤波场合。
总结：FNR5040S331MT 适用于需要较大电感量且重视屏蔽的小型化电源滤波场景，但需特别注意其较高的 DCR 与 Isat 小于额定电流的特性，设计时应做好电流余量、功耗和散热评估，必要时考虑更高电流等级或更低 DCR 的替代件。若需要我可以帮您计算不同工作电流下的功耗与温升估算，或推荐替换型号。
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