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WR06X3903FTL是华新科(Walsin)WR系列旗下的0603封装厚膜贴片电阻,属于通用型电子元件,专为满足中低功率、中等精度的电路设计需求开发。该型号以390kΩ阻值为核心参数,搭配±1%精度、100mW额定功率等指标,覆盖消费电子、工业控制、通信设备等多领域的基础电路应用,是电子设计中常见的标准化电阻选型之一。
该型号的核心性能参数直接决定了其适用场景,具体如下:
标称阻值为390kΩ(390×10³Ω),精度等级为±1%,属于工业级通用精度范畴——既避免了高精度电阻(如±0.1%)的成本冗余,又能满足多数信号调理、分压、反馈电路的精度需求(例如电源反馈环路中,±1%精度可保证输出电压波动控制在合理范围)。
额定功率为100mW(0.1W),最大工作电压为75V。需注意:功率与电压存在联动限制,实际使用中需同时满足( P=V²/R )的计算关系(如390kΩ电阻在75V下的功率约为14.4mW,远低于100mW额定值,因此电压限制更严格);若环境温度超过25℃,需按功率-温度曲线降额(如155℃时额定功率降额至约20mW)。
温度系数(TCR)为**±100ppm/℃,表示每变化1℃,阻值变化±0.01%——这是厚膜电阻的典型TCR值,能适应多数工业环境的温度波动;工作温度范围为-55℃~+155℃**,覆盖了常规工业级温宽(如汽车电子低温启动、工业现场高温环境),无需额外降额即可稳定工作。
采用0603封装(英制命名,对应公制1608封装),尺寸约为1.6mm(长)×0.8mm(宽)×0.4mm(厚),属于小型化贴片封装,适配高密度PCB设计(如手机主板、小型通信模块),且支持自动化贴装(回流焊、波峰焊),生产效率高。
厚膜电阻通过丝网印刷电阻浆料+高温烧结工艺制成,相比薄膜电阻成本更低,相比碳膜电阻稳定性更强;其电阻层与陶瓷基底结合牢固,抗机械冲击、抗振动性能优异,适合长期使用场景(如工业PLC的连续运行)。
WR06X3903FTL因参数均衡,广泛应用于以下场景:
该型号具备良好的可靠性:
该型号以高性价比、稳定性能成为电子设计中常用的基础元件之一,可满足多数常规电路的功能需求。
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