WMSIC Electronic Components

TA-I RL12FTNR390

ModelRL12FTNR390
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
RL12FTNR390
Type
TA-I Technology
Minimum package
5000 圆盘

Technical parameters

Power
500mW
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RL12FTNR390
Electronic Component
1
Package
1206
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.03g
Electronic Component
390mΩ
Electronic Component
1
Electronic Component
BM0264549224
Electronic Component
SMD
Electronic Component
±200ppm/℃
Resistor Type
Metal Film Resistor
Electronic Component
Electronic Component

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

RL12FTNR390电流采样电阻/分流器产品概述

RL12FTNR390是大毅科技推出的一款贴片式电流采样电阻(分流器),专为电子电路中的电流检测、过流保护及功率监控设计,凭借高精度、小体积、稳定的温度特性,适配多种中低功率电子设备的高密度布局需求。

一、产品定位与核心属性

作为电流采样领域的实用型元件,RL12FTNR390的核心定位是中低功率电路的高精度电流检测,解决传统采样元件精度不足、体积过大或功率不匹配的问题。其核心属性可概括为:

  • 贴片式1206封装,适配自动化生产与紧凑PCB设计;
  • 低阻值(390mΩ)+ 高精密(±1%),保障电流采样的准确性;
  • 500mW额定功率,覆盖1A级电流检测场景;
  • ±200ppm/℃温度系数,满足宽温度范围下的稳定性需求。

二、关键参数详解

1. 阻值与精度

RL12FTNR390的标称阻值为390mΩ(即0.39Ω),精度等级为**±1%**。在常温(25℃)下,实际阻值偏差不超过±3.9mΩ,可有效降低电流计算误差(电流I=V/R,阻值偏差直接影响电流检测精度)。该精度水平适用于对采样准确性要求较高的电源管理、电机控制等场景。

2. 功率额定值

额定功率为500mW,根据功率公式P=I²R,可计算其最大允许电流约为1.13A(I=√(P/R)=√(0.5W/0.39Ω)≈1.13A)。这一功率范围覆盖了大部分中低功率电路的电流检测需求,避免因功率过载导致电阻烧毁。

3. 温度系数(TCR)

温度系数为**±200ppm/℃**,表示温度每变化1℃,阻值变化±200×10⁻⁶。以环境温度从25℃升至100℃(变化75℃)为例,阻值变化约为±0.00585Ω(±1.5%),可满足工业环境(-40℃85℃)或消费电子(0℃50℃)的温度波动需求,保证不同温度下采样精度的一致性。

4. 封装与安装

采用1206贴片封装(英制尺寸:长3.2mm×宽1.6mm),符合国际电子封装标准,适配回流焊、波峰焊等自动化贴装工艺,焊接可靠性高;小体积设计可有效节省PCB空间,支持高密度电路板布局,尤其适合便携设备、小型模块的设计需求。

三、应用场景适配

RL12FTNR390的参数特性使其适配以下典型场景:

  1. 电源管理系统:开关电源、线性电源的输出电流检测,电池管理系统(BMS)的充放电电流监控(如笔记本电脑、智能穿戴设备);
  2. 电机控制电路:小型直流电机、步进电机的电流采样(如智能家居电机、小型机器人),实现转速控制与过流保护;
  3. 工业控制模块:PLC、传感器模块的电流检测,工业自动化设备的状态监控;
  4. 消费电子设备:手机充电器、移动电源的过流保护电路,保障设备安全;
  5. 汽车电子(辅助场景):车载小功率设备(如车载充电器、氛围灯)的电流监控(需结合具体环境认证)。

四、品牌与品质背书

大毅科技作为专业被动元件制造商,拥有多年电阻研发与生产经验,RL12FTNR390符合RoHS、REACH等环保标准,电极采用抗氧化材料,耐焊接热性能优异(可承受260℃回流焊温度),长期使用可靠性高;批量产品一致性好,可降低客户生产良率风险,是中低功率电流采样场景的可靠选择。

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