WMSIC Electronic Components

RALEC LR2010-21R050F2 LR2010

ModelLR2010-21R050F2
Package2010
BrandRALEC
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
RALEC LR2010-21R050F2
Type
RALEC
Minimum package
2000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
RALEC
Electronic Component
LR2010-21R050F2
Electronic Component
1
Package
2010
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.073g
Electronic Component
50mΩ
Electronic Component
1
Electronic Component
BM0265966502
Electronic Component
SMD
Electronic Component
±50ppm/℃
Resistor Type
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.

RALEC旺诠LR2010-21R050F2电流采样电阻产品概述

一、产品定位与核心价值

RALEC旺诠LR2010-21R050F2是一款贴片式电流采样电阻(分流器),专为中小功率电路的精准电流检测设计。其核心价值在于通过低阻值、高精度与稳定的温度特性,将电流信号高效转换为电压信号(V=I×R),为过流保护、功率监控、SOC(剩余电量)估算等功能提供可靠信号源,适配消费电子、工业控制、汽车电子等多领域应用。

二、关键性能参数深度解析

该电阻的参数精准匹配中小功率电流采样需求,核心参数如下:

2.1 阻值与精度

  • 标称阻值:50mΩ(0.05Ω),属于低阻值分流器范畴,可在不显著增加电路功耗的前提下,实现电流-电压信号转换;
  • 精度等级:±1%,满足多数中高精度场景(如电池管理系统、快充电源)的误差要求,无需额外复杂校准电路。

2.2 功率与电流承载能力

  • 额定功率:1W(25℃常温下);结合阻值计算,最大允许持续电流约4.47A(I=√(P/R)=√(1/0.05)),适配中小功率设备的电流检测;
  • 功率降额:环境温度升高时(如车载场景-40℃~85℃),需按旺诠官方曲线降额(85℃时降额至约0.6W),避免过热漂移。

2.3 温度系数(TCR)

  • 温度系数:±50ppm/℃,即温度每变化1℃,阻值变化±50×10⁻⁶。以50mΩ为例,温度变化100℃时,阻值仅变化±250μΩ(相对变化0.5%),稳定性优于普通碳膜电阻。

2.4 封装与寄生参数

  • 封装形式:2010贴片封装(英制,对应公制5025:5.0mm×2.5mm),符合IPC标准,尺寸紧凑,适配高密度PCB设计;
  • 寄生参数:采用旺诠专利合金电阻体,寄生电感/电容极低(典型值<1nH/1pF),适合100kHz以下高频电流采样。

三、品牌与可靠性背书

RALEC(旺诠)作为台湾资深电阻制造商,拥有30余年专业经验,产品可靠性通过以下保障:

  1. 材料工艺:低温度系数合金电阻体+耐温环氧树脂涂覆,焊接兼容性强;
  2. 认证标准:符合RoHS 2.0、REACH环保要求,部分批次通过AEC-Q200汽车级认证;
  3. 质量管控:每批次经阻值分选、温度特性测试,确保一致性。

四、典型应用场景

该电阻适配多领域核心场景:

  1. 电池管理系统(BMS):新能源汽车、储能电池、电动工具的电流检测,实现过充过放保护与SOC估算;
  2. 快充电源:手机、笔记本电脑快充适配器的输出电流检测,控制恒流充电精度;
  3. 工业控制:PLC、变频器、伺服电机的电流闭环控制,实现过载保护与功率监控;
  4. 消费电子:智能家居、智能穿戴的低功耗电流采样,监测待机/工作电流;
  5. 汽车电子:车载充电器、车灯控制电路的电流检测(需配合降额使用)。

五、应用注意事项

  1. 功率降额:实际功率需控制在额定值80%以下(环境温度>60℃时),避免过热;
  2. 焊接工艺:回流焊峰值温度240℃~260℃,时间<10s,遵循旺诠推荐曲线;
  3. 温度补偿:温度波动大场景(-40℃~85℃),可加入补偿模块提升精度;
  4. 高频适配:>100kHz场景需确认带宽匹配,必要时选择更高频率特性电阻。

六、总结

RALEC旺诠LR2010-21R050F2以低阻值、高精度、稳定温度特性为核心优势,结合2010封装的紧凑性,成为中小功率电路电流采样的优选器件。其适配多领域需求,依托旺诠品牌可靠性,可满足消费电子、工业控制、汽车电子等不同等级要求,是实现精准电流检测的可靠选择。

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