WMSIC Electronic Components

cjiang FHD252012S-3R3MT FHD252012S

ModelFHD252012S-3R3MT
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 FHD252012S-3R3MT
Type
SMD
Minimum package
2000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJIANG
Electronic Component
FHD252012S-3R3MT
Electronic Component
1
Package
SMD
Electronic Component
Power Inductor
Electronic Component
±20%
Electronic Component
0.056g
Inductor
3.3uH
Electronic Component
1
Electronic Component
BM0264754141
Current
1.8A
Resistor(DCR)
175mΩ
Electronic Component
Electronic Component
Electronic Component
2000
and Current(Isat)
2.1A

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

FHD252012S-3R3MT 功率电感产品概述

一、产品定位与核心身份

FHD252012S-3R3MT是长江微电(cjiang)推出的小型化表面贴装(SMD)功率电感,定位于中电流密度、高密度布局的电源电路场景。型号命名中:

  • “252012”对应贴片封装关键尺寸(长×宽×高≈2.5mm×2.0mm×1.2mm);
  • “3R3”代表标称电感值3.3μH;
  • 后缀“MT”为长江微电内部封装/工艺标识,属于常规功率电感系列。

二、关键电气参数深度解析

该电感的核心参数围绕“功率承载、效率与稳定性”设计,具体解析如下:

1. 电感值与精度

标称电感值3.3μH,精度±20%,覆盖DC-DC转换、滤波、储能等常见电源应用的电感需求。20%的偏差范围已满足大部分工业/消费电子的设计裕量(若需更高精度,需结合电路功能调整,如射频滤波需±10%以内)。

2. 电流特性

  • 额定电流(Irms)1.8A:指电感在额定工作温度(-40℃~+125℃)下,长期稳定工作且DCR温升不超过40℃(行业常规)的最大连续电流,是电路设计的“安全连续电流上限”;
  • 饱和电流(Isat)2.1A:指磁芯未发生明显饱和(电感值下降≤30%)的最大电流。若电路瞬态电流超过2.1A,电感值会急剧降低,导致电源纹波增大、效率下降,需在设计中预留10%~15%的裕量。

3. 直流电阻(DCR)175mΩ

小阻值是该电感的核心优势:在1.8A连续电流下,损耗仅为1.8²×0.175≈0.57W,可有效控制电感自身发热,提升整体电路能效(尤其适合对电池续航敏感的便携式设备)。

三、封装与物理特性

采用无铅SMD封装,符合RoHS环保标准,焊接兼容性优异:

  • 支持回流焊、波峰焊等常规贴片工艺,焊接温度曲线适配行业主流设备(峰值温度230℃~245℃,时间≤10s);
  • 磁芯采用高性能铁氧体材料,兼顾电感值稳定性与电流承载能力;绕组采用高导电率铜线,进一步降低DCR损耗;
  • 紧凑尺寸(2.5mm×2.0mm×1.2mm)适合高密度PCB布局,可缩小终端产品体积(如智能手机、USB PD充电器等空间敏感设备)。

四、典型应用场景

该电感的参数与封装特性,使其成为以下场景的优选:

1. 消费电子

  • 智能手机/平板电脑的DC-DC降压转换器(5V转3.3V/1.8V),负责储能与滤波,提升电压稳定性;
  • 电池管理系统(BMS)的电流传感器滤波电路,减少信号干扰。

2. 小型电源

  • USB PD充电器(30W~65W)的功率电感,满足“小体积+高功率”设计需求;
  • 移动电源的升压电路,提升输出效率与纹波抑制能力。

3. 工业与通信

  • 小型PLC模块的电源滤波电路,稳定控制电路供电;
  • 路由器/交换机的DC-DC转换电路,降低电磁干扰(EMI)。

五、品牌与可靠性保障

长江微电(cjiang)是国内专注功率电感研发的厂商,该产品经过严格可靠性测试:

  • 高低温循环测试(-40℃~+125℃,1000次)、湿度测试(85℃/85%RH,1000h);
  • 振动测试(10Hz~2000Hz,加速度2g),符合GB/T 12794、IEC 61000行业标准;
  • 批量供货稳定,适合终端产品规模化生产,降低供应链风险。

六、选型与使用注意事项

  1. 电流裕量:连续工作电流≤1.8A,瞬态峰值电流≤2.1A,避免磁饱和或过热;
  2. 散热设计:在电感焊盘下方铺铜(≥10mm²),增加散热面积;
  3. 精度适配:若应用对电感精度要求高(如射频电路),需换用±10%精度型号;
  4. 焊接工艺:严格遵循长江微电推荐的回流焊曲线,避免过温损坏磁芯。

该电感凭借“小尺寸、高电流密度、低损耗”的特点,成为消费电子、小型电源领域的高性价比选型,可满足大部分中端电源电路的设计需求。

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