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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。
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:
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)。
±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。
1206贴片封装(尺寸3.2mm×1.6mm×0.5mm,行业标准尺寸):
RLH12FTCR140采用1206标准贴片封装,具有以下设计优势:
RLH12FTCR140的参数特性使其适用于以下场景:
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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