WMSIC Electronic Components

TA-I Technology RLP25FEGMR003

ModelRLP25FEGMR003
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
RLP25FEGMR003
Type
2512
Minimum package
4000 圆盘

Technical parameters

Power
3W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLP25FEGMR003
Electronic Component
1
Package
2512
Electronic Component
SMD Resistor
Electronic Component
±1%
Electronic Component
0.127g
Electronic Component
3mΩ
Electronic Component
1
Electronic Component
BM0264899859
Operating Temperature
55℃~+170℃
Electronic Component
±50ppm/℃
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.

RLP25FEGMR003 贴片功率电阻产品概述

RLP25FEGMR003是大毅科技推出的2512封装低阻贴片功率电阻,专为电流采样、功率监测等对阻值精度、功率承载能力要求较高的场景设计,兼具宽温适应性与高可靠性,可满足工业控制、汽车电子等领域的应用需求。

一、产品基本定位与核心参数

该电阻属于高精度低阻功率型贴片电阻,核心参数如下:

  • 标称阻值:3mΩ(毫欧级)
  • 阻值精度:±1%
  • 额定功率:3W(2512封装下的高功率密度设计)
  • 温度系数(TCR):±50ppm/℃
  • 工作温度范围:-55℃~+170℃
  • 封装规格:2512(英制尺寸,对应公制6.4mm×3.2mm)

二、关键性能指标详解

2.1 阻值精度与温度稳定性

标称阻值3mΩ属于毫欧级低阻,±1%的精度意味着实际阻值偏差仅±30μΩ(微欧),可满足电池管理系统(BMS)充放电电流检测等对采样精度要求较高的场景。
温度系数±50ppm/℃是核心优势:以工作温度范围为例,从-55℃到+170℃温差达225℃,阻值变化量为3mΩ×50ppm/℃×225℃≈33.75μΩ,与精度偏差范围接近,说明温度变化对阻值的影响被控制在极低水平,无需额外温度补偿即可保证宽温下的采样精度。

2.2 功率承载能力

额定功率3W在2512封装中属于高功率密度设计(2512封装典型功率多为1W~2W),通过优化电阻膜层与封装结构,可在紧凑空间内实现较高功率输出。
从功率与电流的关系(( P=I^2R ))计算,该电阻最大工作电流约为31.6A(( I=\sqrt{3W/3mΩ}≈31.6A )),可覆盖中小功率设备的电流检测需求。

2.3 宽温适应性

工作温度范围-55℃+170℃,覆盖**工业级(-40℃+125℃)** 和汽车级(-40℃~+150℃) 要求,甚至可在汽车发动机舱、工业炉附近等高温场景稳定工作,无需额外散热措施。

三、封装与工艺特点

3.1 2512封装优势

适配SMT自动化生产,焊接工艺成熟,兼容常规回流焊、波峰焊流程;封装尺寸紧凑(6.4mm×3.2mm),适合高密度PCB布局,节省设备内部空间。

3.2 低阻工艺设计

采用合金箔低阻工艺(大毅科技专利技术),确保阻值一致性与长期稳定性;电阻膜层与陶瓷基底结合牢固,抗振动、抗冲击性能优异,符合JESD20振动测试标准。

四、典型应用场景

该电阻的低阻、高精度、高功率特性使其广泛应用于:

  1. 电池管理系统(BMS):检测锂电池充放电电流,保障电池组安全;
  2. 电机驱动电路:监测伺服电机、无刷电机工作电流,实现过载保护;
  3. 电源管理模块:DC-DC/AC-DC转换器的电流采样与功率监测;
  4. 汽车电子:车载充电器、电动助力转向(EPS)系统的电流检测;
  5. 工业控制设备:变频器、PLC的电流反馈回路。

五、可靠性与环境适应性

5.1 长期稳定性

经额定功率1000小时负载寿命测试,阻值变化率≤±1%,符合工业级电阻可靠性要求;

5.2 环境耐受性

  • 耐湿度:符合JESD22-A101标准,可在高湿度环境长期工作;
  • 抗振动/冲击:承受10G(20~2000Hz)振动与50G(11ms)冲击,适合移动设备或工业现场;
  • 焊接兼容性:回流焊峰值温度260℃(10秒)、波峰焊245℃(5秒),无性能衰减。

六、选型与应用注意事项

  1. 散热设计:3W功率需增加焊盘面积(≥10mm²)或铺设散热铜箔,避免局部过热;
  2. 电流限制:实际工作电流≤31.6A(额定值),防止过载导致阻值漂移;
  3. 精度匹配:若需更高精度(如±0.5%),需结合场景校准;
  4. 焊接工艺:避免焊接温度过高/时间过长,防止损伤电阻膜层。

RLP25FEGMR003凭借低阻、高精度、宽温适应性与高功率密度,成为工业控制、汽车电子等领域电流采样的理想选择,可有效提升设备的电流监测精度与可靠性。

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