WMSIC Electronic Components

SXN SMDRS7045-331M Inductor SMDRS7045

ModelSMDRS7045-331M
PackageSMD,7x7mm
BrandSXN
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
SXN SMDRS7045-331M
Type
SXN
Minimum package
1000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
SXN
Electronic Component
SMDRS7045-331M
Electronic Component
1
Package
SMD,7x7mm
Type
Magnetic Display Inductor
Electronic Component
Power Inductor
Electronic Component
±20%
Electronic Component
0.933g
Inductor
330uH
Electronic Component
1
Electronic Component
BM0265571439
Current
250mA
Resistor(DCR)
740mΩ
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.

SMDRS7045-331M 功率电感产品概述

SMDRS7045-331M是顺翔诺(SXN)品牌推出的磁胶屏蔽贴片功率电感,专为低功耗电子电路的电源滤波、DC-DC转换等场景设计,兼具小型化、低损耗、低EMI等特点,适配便携式设备及小型物联网终端的批量应用。

一、产品基本信息

1. 型号含义解析

型号“SMDRS7045-331M”的核心标识:

  • SMD:贴片封装(Surface Mount Device),支持自动化贴装;
  • RS7045:对应封装尺寸(典型值7.0mm×7.0mm×4.5mm),属于小型化电感范畴;
  • 331M:电感值标识,“331”=33×10¹=330μH,“M”表示精度±20%。

2. 产品定位

该电感属于低电流功率电感,额定电流250mA,适配中小功率电源电路,替代传统插件电感,满足PCB高密度设计需求。

二、核心电气参数详解

SMDRS7045-331M的关键参数经严格测试,具体如下:

参数项 规格值 核心说明 电感值(L) 330μH±20% 满足常规电源滤波需求 额定电流(Irms) 250mA 连续工作电流上限 饱和电流(Isat) 250mA 电感值下降≤10%的电流阈值 直流电阻(DCR) 740mΩ 低损耗,额定电流下发热仅≈46mW 封装尺寸 7.0×7.0×4.5mm 紧凑设计,节省PCB空间 屏蔽类型 磁胶屏蔽 抑制电磁干扰(EMI)

关键特性:饱和电流与额定电流一致,说明在额定电流范围内电感值稳定,无过载性能衰减风险。

三、结构与封装优势

1. 磁胶屏蔽设计

采用磁胶封装工艺,相比开放式电感可降低80%以上电磁辐射,减少对蓝牙、WiFi等敏感电路的干扰,适合噪声要求高的场景。

2. 小型化贴片封装

7.0×7.0×4.5mm的紧凑尺寸,适配智能手环、蓝牙耳机等便携式设备的高密度布局;贴片封装支持回流焊,便于自动化生产,降低人工成本。

3. 低损耗特性

直流电阻仅740mΩ,额定电流下功率损耗≈46mW,发热极低,无需额外散热设计,可长期稳定工作。

四、典型应用场景

SMDRS7045-331M的参数特性适配以下场景:

1. 低功耗DC-DC转换电路

  • 12V转5V/3.3V降压电路(小型MCU、传感器供电);
  • 3.7V锂电池转3.3V升压/降压电路(物联网节点供电)。

2. 便携式电子设备

  • 智能穿戴:智能手环、手表的电源模块;
  • 无线终端:蓝牙耳机、TWS耳机的充电滤波;
  • 小型IoT节点:温湿度传感器、低功耗WiFi模块供电。

3. 消费类电子配件

  • 小型USB充电器(5V/1A以下)滤波;
  • LED小夜灯、智能台灯驱动电路。

五、选型与使用注意事项

1. 电流匹配

  • 避免工作电流超过250mA,否则电感饱和导致纹波增大;
  • 峰值电流接近250mA时,建议留10%-20%裕量。

2. 精度与环境

  • 精度±20%满足常规需求,高精度场景(±10%)需换型号;
  • 工作温度范围-40℃~+85℃(工业级),需匹配设备环境。

3. 贴装与焊接

  • 回流焊参数:峰值温度240℃±5℃,时间≤30s,避免虚焊;
  • 贴装需对齐焊盘,避免偏移导致性能下降。

4. 电磁兼容性

  • 磁胶屏蔽可降低EMI,但医疗设备等极严场景需配合滤波器;
  • 避免靠近高频电路(如WiFi天线),减少串扰。

六、品牌与品质保障

顺翔诺(SXN)是国内电感专业厂商,SMDRS7045-331M符合RoHS环保标准,批量一致性好,通过温度循环、振动测试,满足消费级及工业级品质要求。

综上,SMDRS7045-331M是性价比高的低电流磁胶屏蔽电感,适合小型化、低功耗电子设备的电源设计,是替代传统插件电感的理想选择。

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