WMSIC Electronic Components

RALEC LR2512-22R005F4 LR2512

ModelLR2512-22R005F4
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

13 specifications

Core information

Product name
RALEC LR2512-22R005F4
Type
RALEC
Minimum package
4000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
RALEC
Electronic Component
LR2512-22R005F4
Electronic Component
1
Package
2512
Electronic Component
0.061g
Electronic Component
1
Electronic Component
BM0265966499
Electronic Component
Electronic Component
Electronic Component
4000

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

RALEC LR2512-22R005F4 电流采样电阻/分流器产品概述

一、基本信息与产品定位

RALEC LR2512-22R005F4是台湾旺诠(RALEC)推出的2512封装低阻值高精度功率型电流采样电阻/分流器,属于该品牌LR2512系列的核心产品。作为电流检测领域的关键器件,其定位为工业控制、新能源、电源系统等对电流精度、功率密度及环境适应性要求较高的场景,通过低阻值设计实现大电流下的高效采样,同时兼顾宽温稳定性与小型化需求。

二、核心技术参数详解

该电阻的参数精准匹配电流采样的严苛要求,具体如下:

  • 阻值与精度:标称阻值5mΩ(毫欧级),精度±1%,可满足大多数场景的电流检测精度;低阻值设计降低了自身功耗对电路的影响,额定功率下最大持续电流可达20A(计算:(I=\sqrt{P/R}=\sqrt{2/0.005}=20A))。
  • 功率额定值:连续工作功率2W,支持短时间过载脉冲(需结合降额曲线使用),适配电源、电机控制等场景的功率需求。
  • 温度系数(TCR):±25ppm/℃,温度每变化1℃,阻值漂移仅±25×10⁻⁶;即使在-55℃至+170℃的宽温范围内,阻值总漂移量仅±0.56%,叠加原始±1%精度后,总误差控制在±1.56%以内。
  • 工作温度范围:-55℃~+170℃,覆盖工业级、汽车级的极端环境,可适应户外充电桩、车载BMS等场景。
  • 封装规格:2512英制贴片封装(公制6.4mm×3.2mm),尺寸紧凑,适配自动化SMT贴装,符合电子设备小型化趋势。

三、关键性能优势

  1. 低阻高精度,采样误差小:5mΩ毫欧级阻值配合±1%精度,可准确捕捉小电流波动(如电池单体电流变化),避免高阻值带来的额外功耗与电压降问题。
  2. 宽温稳定,环境适应性强:±25ppm/℃的TCR在宽温范围内阻值漂移极小,无需额外温度补偿电路,简化设计成本。
  3. 高功率密度,空间利用高效:2512小封装实现2W额定功率,功率密度达约100W/cm³,适合紧凑空间的PCB布局(如新能源汽车BMS模组内设计)。
  4. 贴片封装优势:无引线设计降低寄生电感/电容,适合高频电流采样(如开关电源纹波检测);兼容回流焊、波峰焊工艺,生产效率高,焊接可靠性强。

四、典型应用场景

该电阻凭借性能优势,广泛应用于以下领域:

  • 新能源:电动汽车BMS的单体/模组电流检测、充电桩输出电流监控与过流保护。
  • 工业控制:变频器、伺服驱动器的电流反馈、电机控制电路采样、工业电源输出监测。
  • 电源系统:大功率开关电源、UPS的电流检测与限流保护、LED驱动电源电流调节。
  • 消费电子:65W以上充电器电流采样、笔记本电池保护板过流检测。
  • 通信设备:基站电源模块电流监控、射频功放电流反馈与功率控制。

五、封装设计与可靠性

  • 工艺结构:采用RALEC核心合金箔电阻技术,激光微调实现高精度阻值;端电极镍/锡镀层,兼容多种焊接工艺,焊接强度符合IPC标准。
  • 耐环境性能:通过振动(10G,20-2000Hz)、冲击(50G,11ms)测试,承受工业现场机械应力;具备耐湿热、耐盐雾性能,适合户外或高湿度环境。
  • 长期可靠性:老化测试后阻值漂移率低于0.1%/1000小时,确保长期使用性能稳定。

六、品牌与质量保障

RALEC(旺诠)拥有30余年功率电阻研发经验,产品覆盖汽车级、工业级等领域,以高精度、高稳定性著称。LR2512-22R005F4符合RoHS、REACH环保标准,部分批次通过AEC-Q200汽车级认证;提供完善售后技术支持与质量追溯体系,为批量应用提供可靠保障。

该产品凭借低阻高精度、宽温稳定、高功率密度等优势,成为电流采样领域的高性价比选择,可满足多行业严苛应用需求。

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