WMSIC Electronic Components

TA-I Technology RLH12FTCR140

ModelRLH12FTCR140
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
RLH12FTCR140
Type
TA-I Technology
Minimum package
5000 圆盘

Technical parameters

Power
1W
Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
RLH12FTCR140
Electronic Component
1
Package
1206
Electronic Component
Current Sense Resistor / Shunt
Electronic Component
±1%
Electronic Component
0.035g
Electronic Component
140mΩ
Electronic Component
1
Electronic Component
BM0264899886
Electronic Component
SMD
Electronic Component
±100ppm/℃
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RLH12FTCR140 贴片采样电阻产品概述

一、产品定位与核心属性

大毅科技RLH12FTCR140是一款专为电流采样场景设计的低阻值高精度贴片电阻,属于该品牌采样电阻系列中的常规实用型号。其核心定位是为中低电流检测系统提供稳定、准确的电流-电压转换功能,适配主流电子设备的小型化、自动化生产需求。该产品整合了低阻值、高精度、合理功率密度与紧凑封装,是消费电子、工业控制等领域电流检测的常用选择。

二、关键性能参数深度解析

1. 阻值与精度

标称阻值140mΩ(即0.14Ω),精度等级±1%——这是采样电阻的核心指标之一:

  • 精度直接决定电流检测误差:若系统要求电流误差≤1%,±1%的阻值精度可满足基础需求;
  • 低阻值设计兼顾功耗控制(避免电阻自身发热过大)与输出电压幅度(V=I×R,当电流为2A时,输出电压达280mV,可被普通ADC芯片清晰识别)。

2. 功率额定值

1W(1瓦特)——1206封装下的功率能力处于常规贴片电阻的中等偏上水平:
根据功率公式( P=I^2R ),该电阻可稳定承载的最大电流约为2.67A(( I=\sqrt{P/R}=\sqrt{1/0.14} )),覆盖了大多数消费电子、小型工业设备的电流范围(如手机电池充电电流通常≤2A,小型电机启动电流≤3A)。

3. 温度系数(TCR)

±100ppm/℃——温度系数反映电阻阻值随温度变化的稳定性:
1ppm表示阻值变化百万分之一,因此±100ppm/℃意味着:温度每升高/降低10℃,阻值变化约±0.01%;若环境温度变化50℃(如从-20℃到30℃),阻值变化仅±0.5%,在常规电子设备的温度波动范围(-40℃~85℃)内可保持电流检测准确性。

4. 封装与安装

1206贴片封装(尺寸3.2mm×1.6mm×0.5mm,行业标准尺寸):

  • 贴片式设计无需插件加工,完全适配SMT(表面贴装技术)生产线,支持回流焊、波峰焊等主流焊接工艺;
  • 紧凑体积适合高密度PCB布局,满足电子设备小型化趋势。

三、封装设计与安装特性

RLH12FTCR140采用1206标准贴片封装,具有以下设计优势:

  • 尺寸紧凑:3.2mm×1.6mm的 footprint 可节省PCB空间,尤其适合手机、智能穿戴等小型设备的电池保护板布局;
  • 焊接可靠性:两端电极采用耐氧化涂层(无铅合金),回流焊温度曲线(峰值230℃~250℃)下焊接牢固,抗振动性能优于插件电阻,可应对运输、使用中的轻微振动;
  • 适配性强:符合IPC标准的封装尺寸,可与其他1206封装元器件兼容,便于PCB设计优化。

四、性能优势与可靠性表现

  1. 精准稳定:±1%精度与±100ppm/℃TCR的组合,在常规工作温度范围内可保持电流检测误差≤1.5%(结合系统其他误差),满足大多数民用/工业场景需求;
  2. 功耗与温度平衡:1W功率额定值避免了电阻在中低电流下的过度发热,结合1206封装的散热面积,可有效控制自身温度升高(通常比环境高10℃~20℃),进一步稳定阻值;
  3. 品质保障:符合RoHS无铅环保要求,通过高温老化、温度循环、振动测试,可在-40℃~85℃宽温度范围内稳定工作;
  4. 成本可控:常规精度与封装设计使其在批量应用中具有性价比优势,适合中低端电子设备的成本控制需求。

五、典型应用场景举例

RLH12FTCR140的参数特性使其适用于以下场景:

  • 消费电子:手机、平板、笔记本电脑的电池保护板电流检测(充电/放电监控);
  • 小型电源设备:开关电源、LED驱动电源的过流保护采样(输出电流超限检测);
  • 工业控制:小型电机驱动电路的电流反馈(微型泵、风扇的电流监控);
  • 智能家居:智能插座、空气净化器的功率检测(通过电流采样计算功率);
  • 车载电子(入门级):车载充电器、点烟器适配器的电流检测(若符合车规可拓展至更多场景)。

总结

大毅科技RLH12FTCR140是一款平衡了精度、功率、体积与成本的贴片采样电阻,核心针对中低电流检测场景,适配主流电子设备的小型化与自动化生产需求,是消费电子、工业控制等领域的实用选择。

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