WMSIC Electronic Components

TA-I RLH12FTCR400

ModelRLH12FTCR400
Package1206
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
RLH12FTCR400
Type
TA-I Technology
Minimum package
5000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLH12FTCR400
Electronic Component
1
Package
1206
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.05g
Electronic Component
400mΩ
Electronic Component
1
Electronic Component
BM0265427459
Operating Temperature
55℃~+155℃
Electronic Component
±100ppm/℃
Electronic Component
Electronic Component
Electronic Component
5000

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RLH12FTCR400合金电阻产品概述

一、产品核心定位与应用场景

RLH12FTCR400是大毅科技针对工业级电流检测、功率限流场景推出的高精度低阻值合金功率电阻,核心定位为“高性价比工业级电流采样电阻”——兼顾精度、功率密度与宽温稳定性,可替代传统线绕电阻(体积大、成本高)或部分薄膜电阻,适配自动化贴装产线。

典型应用场景包括:

  1. 开关电源/DC-DC转换器的电流反馈采样;
  2. 电机驱动控制器的过流保护与电流监控;
  3. 电动车电池管理系统(BMS)的单体电池均衡与电流检测;
  4. 工业自动化设备(PLC、伺服系统)的信号调理电路;
  5. 消费电子快充适配器的功率限流与安全保护。

二、关键性能参数详解

RLH12FTCR400的参数设计围绕“低阻、高精度、宽温稳定”三大核心,具体如下:

  • 阻值与精度:400mΩ(0.4Ω),±1%精度,满足工业设备对阻值一致性的要求,无需额外校准即可实现基础电流检测;
  • 功率额定值:1W(1206封装下的高功率密度),实际使用建议降额至0.8W以内,避免长期过热老化;
  • 温度系数(TCR):±100ppm/℃,即温度每变化1℃,阻值变化±0.04mΩ。在-55℃~+155℃全温范围内,总阻值变化约±0.8mΩ,远优于普通碳膜电阻,适合温变剧烈的环境;
  • 工作温度范围:-55℃~+155℃,覆盖车载、工业户外等严苛环境的温度需求,符合AEC-Q200可靠性标准;
  • 封装尺寸:1206(英制,对应公制3216),贴片式封装,适配主流SMT贴装设备,生产效率提升显著。

三、封装与可靠性设计

RLH12FTCR400采用合金电阻核心+1206贴片封装,可靠性设计突出“抗温变、抗冲击、焊接稳定”:

  • 合金材料:采用锰铜合金(大毅专利配方),相比碳膜/金属膜电阻,阻值稳定性提升30%以上,抗老化能力强;
  • 封装结构:陶瓷基片+环氧树脂封装,耐焊接高温(回流焊峰值温度260℃±5℃),抗机械振动(10g/50-2000Hz)与冲击(50g/11ms);
  • 焊接兼容性:支持无铅焊接,符合RoHS环保标准,适配绿色制造需求;
  • 长期可靠性:经过1000小时高温负载测试(125℃+额定功率),阻值变化率≤0.5%,满足工业设备5-10年使用寿命要求。

四、应用领域与市场价值

RLH12FTCR400的市场价值体现在“成本与性能的平衡”:

  • 工业领域:替代线绕电阻后,体积缩小30%以上,贴装效率提升2倍,单台设备成本降低10%-15%;
  • 电动车BMS:宽温范围适配车载环境(-40℃~+85℃),低阻值降低采样功耗(1A电流下功耗仅0.4W),间接提升电池续航;
  • 消费电子:快充适配器中用于过流保护,1W功率满足1.5A左右电流的采样需求,性价比优于同规格薄膜电阻;
  • 市场需求:随着工业自动化、电动车、快充技术的发展,低阻高精度功率电阻年需求增长12%以上,RLH12FTCR400精准匹配该赛道。

五、选型与使用注意事项

为确保性能稳定,使用时需注意以下几点:

  1. 功率降额:实际负载功率建议不超过额定功率的80%(即0.8W),避免长期过热导致阻值漂移;
  2. 焊接参数:回流焊温度曲线需符合IPC标准(峰值260℃,时间≤10秒),手工焊接温度≤350℃,时间≤3秒;
  3. 温漂补偿:若需更高精度(如±0.5%),可通过运放放大+温度补偿电路抵消TCR影响;
  4. 存储条件:未开封产品需存放在25℃±5℃、湿度≤60%的环境中,开封后建议1年内使用完毕;
  5. 散热设计:1206封装虽有散热能力,但高负载下(如0.8W)需确保PCB焊盘面积≥0.5mm²,避免局部过热。

综上,RLH12FTCR400是一款兼具“高精度、宽温稳定、高性价比”的合金功率电阻,可广泛应用于工业、汽车、消费电子等领域,是中低端设备电流采样场景的优选方案。

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