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cjiang FNR4012S120MT
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- cjiang FNR4012S120MT
- Type
- CJIANG
- Minimum package
- 4500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJIANG
- Electronic Component
- FNR4012S120MT
- Electronic Component
- 1
- Package
- SMD
- Type
- Magnetic Display Inductor
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.165g
- Inductor
- 12uH
- Electronic Component
- 1
- Electronic Component
- BM0264799446
- Current
- 950mA
- Resistor(DCR)
- 377mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 4500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
FNR4012S120MT — 长江微电（cjiang）12µH 磁胶屏蔽功率电感（SMD 4×4）
一、规格参数
- 型号：FNR4012S120MT
- 电感值：12 µH（±20%）
- 额定电流：0.95 A
- 饱和电流（Isat）：1.0 A（磁通量下降明显点）
- 直流电阻（DCR）：0.377 Ω
- 类型：磁胶屏蔽电感（shielded）
- 封装：SMD，尺寸约 4 × 4 mm
二、主要特点
- 小尺寸（4×4mm）适合空间受限的SMD电源板。
- 磁胶屏蔽结构，漏磁小，有利于降低对周围敏感器件的干扰。
- 适合中小电流开关电源、滤波器等场合，电感值较大，利于降低纹波电流。
- 高DCR意味着在高电流下存在可观的铜损，需注意热管理。
三、典型应用
- 同步/非同步降压（Buck）转换器的输出滤波与储能。
- 电源滤波（输入/输出）与EMI抑制。
- LED驱动、便携设备电源、工控和通信电源模块。
四、选型与热管理建议
- 若工作电流长期接近额定值，应留有裕量（建议工作电流≤额定电流的70%~80%），以避免温升和磁饱和。
- 损耗估算示例：在0.95 A时，P_loss ≈ I^2·DCR ≈ 0.95^2×0.377 ≈ 0.34 W；在0.7 A时约 0.185 W。根据系统散热能力判断是否可接受。
- 若峰值电流或纹波电流较大，应关注电感在直流偏置下的电感衰减和饱和特性。
五、PCB布局与焊接建议
- 将电感尽量靠近开关器件与输出电容，缩短高频回路环路长度，减小寄生电感与辐射。
- 顶层走大铜箔并配合过孔导热，必要时在焊盘下方及周围布热铜和通孔以利散热。
- 推荐使用无铅回流工艺（按元件供应商资料的回流曲线），避免反复手烙接触导致损伤。
六、测试与验收建议
- 电感测量建议在规定频率（常用100 kHz）与小信号幅度下进行，同时测量加直流偏置时的电感保持性。
- DCR 使用四线法微欧计测量以确保准确性；高温测试关注DCR上升和热稳定性。
- 饱和测试通过施加直流偏置并记录电感下降点，验证Isat约为1 A 的表现。
七、采购与封装提示
- 订购前确认供应商数据手册（封装图、回流曲线、材料信息等）。
- 小批量样品测试后再进入量产；批量采购时关注包装方式（卷带/盘装）与存储条件。
以上为基于 FNR4012S120MT 主要参数的产品概述与实用建议，具体电路设计与可靠性评估请结合最终应用场景与完整数据手册进行验证。
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