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RLM25FEER007是大毅科技(Taiyo Yuden) 推出的贴片式电流采样电阻(分流器),专为中功率电路的电流检测、过载保护及电源管理场景设计。该产品基于低阻合金工艺打造,核心基础规格明确:
7mΩ的毫欧级阻值是核心设计点——低阻可降低采样压降((V=I×R)),避免对被测电路造成额外损耗。结合2W功率等级,计算最大持续工作电流:
[ I_{\text{max}} = \sqrt{\frac{P}{R}} = \sqrt{\frac{2W}{0.007Ω}} \approx 16.9A ]
即最大可稳定承载约17A的持续电流,覆盖笔记本BMS充电、低压伺服电机、开关电源输出等典型场景的电流需求。
2W功率采用2512封装,功率密度较高(单位面积功率≈9.7mW/mm²)。大毅科技通过优化合金膜层厚度及封装散热结构,确保产品在额定功率下长期工作时,表面温度控制在安全范围内(典型≤120℃),避免热失效。
2512封装为行业通用贴片尺寸,引脚间距符合IPC-J-STD-001标准,兼容主流PCB设计(如Altium Designer、KiCad)的封装库,无需额外定制;同时支持回流焊、波峰焊等自动化贴装工艺,可显著提升批量生产效率。
该产品采用锰铜合金箔作为电阻体,此类合金具有低TCR、高稳定性、抗老化等特点,相比普通金属膜电阻,更适合低阻采样场景;封装外壳采用耐高温环氧树脂,具备防潮、防腐蚀能力,可承受260℃回流焊温度(符合IPC标准)。
RLM25FEER007符合RoHS 2.0(无铅、无镉、无汞)及REACH指令要求,适合出口至欧盟、北美等对环保要求严格的市场。
该产品通过核心性能与封装工艺的平衡,成为中功率电流检测场景的高性价比选择,适配消费电子、工业控制、新能源等多领域需求。
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