WMSIC Electronic Components

TA-I Technology RLP25FEGMR005

ModelRLP25FEGMR005
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
RLP25FEGMR005
Type
TA-I Technology
Minimum package
4000 圆盘

Technical parameters

Power
3W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLP25FEGMR005
Electronic Component
1
Package
2512
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.084g
Electronic Component
5mΩ
Electronic Component
1
Electronic Component
BM0264800752
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.

大毅科技RLP25FEGMR005 电流采样电阻产品概述

一、产品定位与核心功能

RLP25FEGMR005是大毅科技推出的贴片式高精度功率型电流采样电阻,属于分流器类核心元器件。其核心功能是通过低阻值特性将电路中的大电流转换为可被微控制器或检测电路识别的小电压信号,实现电流监控、过流保护、功率测量等关键功能。该产品针对工业级可靠性与功率密度平衡设计,适配多种需要精准电流检测的电子系统,尤其适合空间受限、功率密度要求高的场景。

二、关键参数解析

该产品的核心参数直接决定其应用边界,具体解析如下:

  1. 阻值与精度:固定阻值5mΩ(毫欧级低阻),精度±1%——低阻设计可大幅降低采样压降((V=I×R)),减少对主电路的功率损耗;±1%精度满足工业级电流检测的基本需求,无需额外校准即可实现可靠的电流换算(如20A电流下压降仅0.1V,换算误差≤0.2A)。
  2. 功率承载能力:额定功率3W——在2512标准贴片封装下,实现较高的功率密度,可支持最大约24.5A的电流采样(按(I=\sqrt{P/R})计算),适配中等功率的电路场景(如20A以内的电源输出检测)。
  3. 温度系数(TC):±50ppm/℃——阻值随温度变化的漂移极小,在-55℃至125℃的宽温范围内(大毅常规工作温度),阻值变化可控制在0.005%/℃以内,确保极端环境下的采样精度稳定。
  4. 封装规格:2512(英制尺寸,对应公制6.4mm×3.2mm)——贴片式封装,兼容自动化贴装工艺,便于集成到高密度PCB设计中,同时降低人工安装成本。

三、设计优势与性能特点

相较于同类低阻采样电阻,RLP25FEGMR005具备以下差异化优势:

  1. 低阻低损耗:5mΩ毫欧级阻值使采样压降远低于主电路电压,几乎不影响电路正常工作,避免额外功耗浪费(如10A电流下损耗仅0.05W)。
  2. 高功率密度:2512封装承载3W功率,对比同封装普通电阻(通常1-2W),功率提升50%以上,适合空间受限但需大电流采样的场景(如电动车BMS的电池电流检测)。
  3. 宽温稳定可靠:±50ppm/℃的温度系数远优于常规碳膜电阻(通常±200ppm以上),可在汽车、工业现场等宽温环境下长期稳定工作,降低温度变化导致的采样误差。
  4. 品牌可靠性:大毅科技作为专业被动元器件厂商,该产品通过RoHS认证,符合无铅焊接要求,且经过严格可靠性测试(高温老化、冷热冲击、振动测试),寿命与稳定性有保障。

四、典型应用场景

RLP25FEGMR005的参数特性使其适配多个领域的电流检测需求:

  1. 工业电源系统:开关电源、DC-DC转换器、UPS的输出电流监控,实现过流保护与功率调节。
  2. 新能源领域:电动车电池管理系统(BMS)的单体/总电流采样,以及充电桩的充电电流检测。
  3. 消费电子:快充充电器、笔记本电脑适配器的过流保护电路,确保设备安全。
  4. 通信设备:基站电源模块、路由器的电流监控,保障设备稳定运行。

五、选型与使用注意事项

  1. 电流容量匹配:最大采样电流需控制在24.5A以内(额定功率3W下),若实际电流超过此值,需并联电阻或选择更高功率型号(如大毅RLP25FEGMR005H)。
  2. 散热设计:2512封装虽功率密度高,但需注意PCB焊盘设计——增加焊盘面积(建议≥10mm²)与铜箔厚度(≥1oz),可有效提升散热效率,避免局部过热导致阻值漂移。
  3. 焊接工艺:采用回流焊时,需遵循大毅推荐的焊接温度曲线(峰值温度245℃±5℃,时间不超过10秒),避免热冲击损坏电阻;手工焊接需控制烙铁温度≤350℃,焊接时间≤3秒。
  4. 精度需求:若应用场景需要更高精度(如±0.5%),需选择大毅同系列的高精度型号(如RLP25FEGMR005F),避免因精度不足导致系统误判。

该产品凭借高功率密度、宽温稳定性与贴片封装优势,成为工业、新能源等领域电流采样的高性价比选择,可满足多数常规电流检测场景的需求。

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