WMSIC Electronic Components

TA-I Technology RLM12FTCMR050

ModelRLM12FTCMR050
Package1206
BrandElectronic Component
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
RLM12FTCMR050
Type
TA-I Technology
Minimum package
5000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLM12FTCMR050
Electronic Component
1
Package
1206
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.03g
Electronic Component
50mΩ
Electronic Component
1
Electronic Component
BM0264549179
Electronic Component
SMD
Resistor Type
Current Sense Resistor
Electronic Component
Electronic Component
Electronic Component
5000

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

大毅科技RLM12FTCMR050 1206封装电流采样电阻产品概述

一、产品定位与核心参数解析

RLM12FTCMR050是大毅科技针对中低功率场景精准电流检测推出的贴片式采样/分流电阻,核心参数精准匹配电源管理、电机控制等领域的实际需求:

  • 阻值:50mΩ(毫欧级低阻设计,最大程度降低主回路功率损耗);
  • 精度:±1%(常温下阻值偏差可控,满足多数采样电路的精度要求);
  • 功率容量:1W(额定功率覆盖中等电流采样场景,适配主流设备电流范围);
  • 封装:1206(英制封装,对应公制3216尺寸,适配自动化贴片生产)。

电流采样电阻的核心作用是将电路电流转化为可检测的电压信号(公式:( V=I×R )),因此低阻、高精度是关键指标。50mΩ的阻值既保证压降可控(如2A电流时压降仅0.1V),又能输出足够电压供ADC采集,1%精度则避免了阻值偏差导致的采样误差。

二、封装与功率特性适配性

2.1 1206封装的应用优势

1206封装尺寸为3.2mm×1.6mm,属于小型贴片封装,具备三大核心优势:

  • 生产适配性:适配自动化贴装设备,可实现高速批量生产,降低制造成本;
  • 电路小型化:占用PCB面积小,适合便携式设备(如充电宝、小型充电器)的紧凑设计;
  • 焊接可靠性:端电极采用“银层+镍层+锡层”三层结构,耐焊接热(符合IPC-A-610标准),长期使用无虚焊风险。

2.2 1W功率容量的场景覆盖

RLM12FTCMR050的1W额定功率(25℃环境温度下),结合50mΩ阻值可计算最大允许电流约为4.47A(( I_{max}=\sqrt{P/R}=\sqrt{1/0.05} ))。实际应用需参考功率降额曲线(大毅建议70℃环境温度下功率降额至0.7W,对应电流3.74A),可覆盖:

  • 2A以内的开关电源输出电流采样;
  • 小型BLDC电机的相电流检测;
  • 家电电机(吸尘器、风扇)的电流反馈控制。

三、精度与温度稳定性保障

除常温±1%精度外,RLM12FTCMR050的温度系数(TCR)约为±50ppm/℃(大毅常规采样电阻特性),有效降低温度波动对阻值的影响:

  • 当环境温度从-40℃变化至85℃(工业级温度范围),阻值变化约为±0.625%,结合初始±1%精度,总误差控制在±1.625%以内;
  • 该稳定性满足多数工业控制、消费电子的温度适应性需求,避免因温度变化导致采样数据漂移(如冬季户外设备、夏季高温车间的稳定检测)。

四、典型应用场景

RLM12FTCMR050凭借低阻、高精度、小封装的特点,广泛应用于以下领域:

4.1 电源管理系统

  • 开关电源/DC-DC转换器:输出电流采样,实现过流保护、恒流输出控制(如100W电源输出2A时,压降0.1V可被芯片精准识别);
  • 充电器/充电宝:充放电电流监控,防止过充过放(如18W快充时,采样电流2A以内,压降0.1V符合ADC检测范围)。

4.2 电机控制领域

  • 小型BLDC电机:相电流检测,配合控制器实现精准调速(如扫地机器人电机电流采样,优化续航与清洁效率);
  • 伺服电机:低速段电流反馈,提升控制精度(适用于小型自动化设备)。

4.3 工业控制与新能源

  • PLC/变频器:模拟量电流输入检测,实现设备状态监控(如传送带电机电流异常报警);
  • 太阳能微型逆变器:输入/输出电流采样,优化功率转换效率(适配小型家庭光伏系统)。

五、品牌与可靠性验证

大毅科技作为专注电阻研发生产30余年的厂商,RLM12FTCMR050具备可靠的品质保障:

  • 环保合规:符合RoHS、REACH标准,无铅焊接兼容,适配绿色制造需求;
  • 长期稳定性:经过1000小时高温老化测试,阻值变化≤0.5%,满足设备5年以上使用寿命要求;
  • 批量一致性:生产过程采用全自动分选,参数离散性小,避免因电阻差异导致的电路性能波动。

RLM12FTCMR050通过精准的参数设计与可靠的工艺保障,成为中低功率电流采样场景的高性价比选择,适配从消费电子到工业控制的多领域需求。

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