WMSIC Electronic Components

RALEC LR2725-24R00025F1 LR2725

ModelLR2725-24R00025F1
Package2725
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+

Availability on request

Technical data

Product details

19 specifications

Core information

Product name
RALEC LR2725-24R00025F1
Type
RALEC
Minimum package
1000 圆盘

Technical parameters

Power
4W
Electronic Component
Electronic Component
Electronic Component
RALEC
Electronic Component
LR2725-24R00025F1
Electronic Component
1
Package
2725
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.408g
Electronic Component
0.25mΩ
Electronic Component
1
Electronic Component
BM0266078515
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LR2725-24R00025F1电流采样电阻(分流器)产品概述

一、产品核心定位:大电流精准采样专用分流器

RALEC旺诠LR2725-24R00025F1是一款超低阻贴片分流器,专为需要宽温稳定、高功率密度的电流采样场景设计。作为旺诠2725封装系列的核心型号,其聚焦工业级、汽车级应用对“低功耗、高精度、抗温漂”的核心需求,是电池管理、电机驱动、电源系统等领域的优选器件。

二、关键性能参数深度解析

1. 阻值与精度:0.25mΩ ±1%

  • 超低阻特性:0.25mΩ(毫欧级)属于大电流采样的典型低阻范围,可显著降低采样电阻的功率损耗(I²R)——例如当电流为100A时,功耗仅为2.5W,远低于4W额定功率,避免电阻发热影响系统稳定性。
  • ±1%精度:电阻值偏差控制在标称值的±1%以内,无需额外校准即可满足多数工业应用的采样精度要求,降低终端产品的设计与测试成本。

2. 功率与散热:4W额定功率

  • 高功率密度:2725封装(尺寸约6.8mm×6.4mm)下实现4W功率,功率密度达约9W/cm²,适配高密度PCB布局(如新能源汽车BMS、服务器电源等紧凑场景)。
  • 散热注意:实际应用需根据环境温度降额(如温度升至100℃时,额定功率降至约2.5W),建议配合PCB铜箔加宽设计增强散热。

3. 温度系数:±50ppm/℃

  • 宽温稳定性:温度每变化1℃,阻值变化±50ppm(即0.005%),是普通电阻的1/5~1/10。例如温度从-40℃(汽车级低温)到125℃(工业级高温)变化165℃,阻值仅变化±0.825%,确保极端温度下采样数据不漂移。

4. 封装与安装:2725贴片式

  • 标准封装:符合国际IEC 60068-2-20标准的2725封装(英制:2700mil×2500mil,公制:6.858mm×6.35mm),兼容性强。
  • 自动化适配:贴片安装支持SMT回流焊、波峰焊工艺,适合大规模自动化生产,降低人工成本与焊接误差。

三、典型应用场景

1. 新能源汽车:电池管理系统(BMS)电流采样

电动车电池充放电电流通常在50~300A,该电阻的低阻特性可减少功耗,避免电池包内发热;±1%精度+宽温稳定的温度系数,确保SOC(荷电状态)计算准确,提升电池寿命与安全性。

2. 工业自动化:变频器、伺服驱动器

电机驱动系统需实时采样电流实现矢量控制,该电阻的低阻适配大电流路径,贴片封装便于在紧凑的驱动器PCB上布局,满足高精度电流反馈需求。

3. 电源系统:服务器电源、快充电源

  • 服务器电源输出电流可达20~100A,该电阻4W功率可满足散热;
  • 快充电源(如PD3.1)输出电流最高28A,其稳定的温度系数确保输出电流精准控制,避免过充/过放。

4. 通信设备:基站电源、光模块

通信设备对功耗敏感,0.25mΩ低阻可降低功率损耗;贴片封装适合高密度通信PCB的小型化设计,满足基站、光模块的电流监测需求。

四、品牌与可靠性优势

  • RALEC旺诠品质:全球知名电阻制造商,专注精密电阻研发30余年,产品符合RoHS、REACH、IEC 60115等国际标准。
  • 可靠性测试:经过温度循环(-55℃125℃,1000次)、湿热老化(85℃/85%RH,1000h)、振动测试(102000Hz,1g),适合工业级、汽车级严苛环境。
  • 批次一致性:生产工艺成熟,阻值一致性达±0.5%(批次间),降低终端产品的筛选成本。

该产品凭借“低阻、高精度、宽温稳定、高功率密度”的综合优势,成为大电流采样场景中极具性价比的核心器件,可有效提升终端产品的性能与可靠性。

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