WMSIC Electronic Components

TA-I Technology RLP25FEER250

ModelRLP25FEER250
Package2512
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
RLP25FEER250
Type
TA-I Technology
Minimum package
4000 圆盘

Technical parameters

Power
2W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLP25FEER250
Electronic Component
1
Package
2512
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.072g
Electronic Component
250mΩ
Electronic Component
1
Electronic Component
BM0264549171
Electronic Component
SMD
Electronic Component
±50ppm/℃
Resistor Type
Current Sense 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.

RLP25FEER250 电流采样电阻产品概述

RLP25FEER250是大毅科技推出的一款高性能贴片式电流采样电阻(分流器),专为中高功率场景下的高精度电流检测设计,兼具功率密度、温度稳定性与生产适配性,是工业控制、电源管理等领域的主流选型之一。

一、产品定位与核心应用

该电阻核心定位为通用型高精度电流采样元件,通过低阻值分流实现电流-电压转换,为电路控制系统提供精准的电流反馈信号。其应用覆盖三大核心领域:

  1. 电源系统:开关电源、DC-DC转换器的输出电流检测与过流保护;
  2. 工业控制:电机驱动、变频器、PLC的电流闭环控制;
  3. 能源管理:锂电池组BMS(电池管理系统)的充放电电流监测、光伏逆变器的功率调节。

二、关键参数详解

RLP25FEER250的参数设计平衡了精度、功率与环境适应性,核心参数及意义如下:

  • 阻值与精度:标称阻值250mΩ(0.25Ω),精度±1%,满足工业级系统对电流检测误差的要求(例如BMS中电流误差需控制在1%以内);
  • 功率能力:额定功率2W,2512封装下功率密度约1.25W/mm²,短时间(如10秒脉冲)可承受1.5倍额定功率(3W),适配瞬态电流场景;
  • 温度系数(TC):±50ppm/℃,即温度每变化1℃,阻值变化±12.5μΩ(计算:50×10⁻⁶×0.25),宽温范围内(-55℃~125℃)阻值漂移小,适合户外或高低温工业环境;
  • 封装与安装:2512贴片封装(英制尺寸6.4mm×3.2mm),兼容自动化贴装线,焊接可靠性符合IPC标准。

三、封装与可靠性设计

该电阻采用合金电阻膜+高导热陶瓷基底结构,兼顾电性能与机械可靠性:

  • 膜层技术:采用镍铬合金膜,阻值稳定性优于传统碳膜/金属膜,长期使用无阻值漂移;
  • 封装工艺:陶瓷基底耐温性好(可承受260℃回流焊温度),表面贴装端子采用镀锡工艺,无铅焊接兼容性强;
  • 抗环境能力:符合RoHS 2.0环保标准,抗振动(10G/50-2000Hz)、抗冲击(50G/1ms),满足工业级可靠性要求。

四、性能优势与适用场景拓展

相比同封装普通电阻,RLP25FEER250的核心优势在于:

  1. 功率密度高:2512封装实现2W功率,无需额外散热片即可满足多数中功率场景;
  2. 温度稳定性强:±50ppm/℃的TC值比同精度普通电阻(通常±100ppm/℃)更优,宽温环境下检测精度无明显下降;
  3. 生产适配性好:贴片封装适合大规模自动化生产,降低人工成本与焊接不良率。

拓展场景包括:车载充电器(OBC)的电流监测、充电桩的功率调节、医疗设备的电源保护等。

五、选型与应用注意事项

为确保性能稳定,应用时需注意以下要点:

  1. 功率降额:实际应用功率建议不超过额定功率的70%(即1.4W),环境温度每升高10℃,降额10%;
  2. 焊接规范:回流焊温度峰值控制在245℃以内,时间不超过30秒,避免热应力损坏膜层;
  3. 散热设计:若环境温度>85℃或功率接近额定,可在PCB对应位置增加1oz铜箔(面积≥2cm²)辅助散热;
  4. 存储要求:未开封产品存储于温度-40℃~85℃、湿度≤85%RH的环境,开封后建议12个月内使用完毕。

综上,RLP25FEER250凭借高精度、高功率密度与宽温稳定性,成为工业控制、电源管理等领域的高性价比电流采样方案,适配多种自动化生产与严苛环境需求。

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