WMSIC Electronic Components

RALEC LR2512-21R100F4 LR2512

ModelLR2512-21R100F4
Package2512
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 LR2512-21R100F4
Type
RALEC
Minimum package
4000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
RALEC
Electronic Component
LR2512-21R100F4
Electronic Component
1
Package
2512
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.061g
Electronic Component
100mΩ
Electronic Component
1
Electronic Component
BM0265114415
Electronic Component
SMD
Electronic Component
±25ppm/℃
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LR2512-21R100F4 贴片功率电阻产品概述

一、产品定位与核心价值

LR2512-21R100F4是台湾旺诠(RALEC)针对精准电流检测、稳定功率耗散场景设计的低阻值贴片功率电阻。其核心价值在于:在2512小型贴片封装下,平衡了100mΩ毫欧级低阻、±1%高精度与1W功率容量,同时通过低温度系数保障宽温区性能稳定,适配自动化生产与严苛应用环境,是工业控制、电源管理、电池系统等领域的实用型器件。

二、关键参数深度解析

2.1 阻值与精度:毫欧级精准控制

阻值为100mΩ(0.1Ω),属于低阻范畴——电流采样场景中,低阻可降低电压降(I×0.1Ω)对电路效率的影响;±1%的精度优于常规功率电阻(±5%),能有效减少电流检测误差,满足工业级与消费电子的精准需求(如5A电流时,检测误差仅±50mA)。

2.2 功率容量:小封装下的功率密度

封装2512(英制尺寸:6.4mm×3.2mm)下实现1W功率容量,功率密度约4.9W/cm²(封装面积≈0.205cm²),适配中低功率电路的持续耗散需求,可承受电机启动、电源瞬态等脉冲功率场景。

2.3 温度系数:宽温区稳定性

**±25ppm/℃**的温度系数,意味着环境温度每变化1℃,阻值仅变化0.0025%;以工业级常规温度范围(-55℃至125℃)计算,总阻值变化最大为0.45%(180℃×25ppm),远低于±1%的精度要求,保障宽温下电流检测与功率输出的一致性。

三、封装与安装特性

3.1 封装规格:2512贴片封装

采用2512英制贴片封装,对应公制尺寸6.4mm(长)×3.2mm(宽)×0.55mm(厚,典型值),符合IPC标准,适配自动化贴片机(SMT)生产,支持回流焊、波峰焊工艺(需遵循旺诠推荐的焊接温度曲线)。

3.2 安装注意事项

  • 焊接温度:回流焊峰值温度≤260℃(持续时间≤10秒),避免高温损坏电阻膜;
  • 清洁要求:可采用40kHz以下超声波清洁(时间≤1分钟),避免残留助焊剂影响性能;
  • 散热设计:若应用功率接近1W,需在PCB预留散热焊盘(如增加铜箔面积),增强热传导。

四、典型应用场景

4.1 电源模块电流检测

DC-DC转换器、开关电源等电路中,用于输出电流采样:低阻(100mΩ)可降低电压降对电源效率的影响,±1%精度保证电流反馈的准确性,助力电源稳压与过流保护。

4.2 电池管理系统(BMS)

新能源汽车、储能电池的BMS中,用于充放电电流检测:宽温稳定性(-55~125℃)适配车载极端环境,低阻减少电池能量损耗,高精度保障SOC(荷电状态)计算的准确性。

4.3 电机驱动电路

工业伺服电机、消费电子电机的驱动电路中,用于过流保护采样:1W功率容量可承受电机启动瞬间的脉冲功率,低阻不影响电机驱动效率,精准采样避免误保护或欠保护。

4.4 快充电路

手机、笔记本快充适配器中,用于输出电流检测:适配快充大电流(如5A时电压降0.5V),低温度系数保障不同环境温度下的充电功率稳定,符合快充协议的精准度要求。

五、品牌与可靠性保障

RALEC(旺诠)是台湾专业电阻制造商,拥有30+年研发生产经验,产品符合RoHS 2.0、REACH等环保标准,通过ISO 9001质量管理体系认证。LR2512系列采用合金膜工艺(低阻常用),电阻膜均匀性好,产品一致性达AEC-Q200(车规级)标准(部分型号),可靠性与寿命满足工业级与车规级应用需求。

该产品凭借“低阻+高精度+宽温稳定”的特性,成为电流检测与功率耗散场景的高性价比选择,适配多领域电路设计需求。

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