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AR02DTD4752是光颉电子(Viking) 推出的0402封装精密薄膜贴片电阻,针对高密度、低功耗、宽温域的电路设计需求开发。光颉作为全球被动元件领域的专业供应商,其薄膜电阻产品以阻值一致性高、长期稳定性好、环境适应性强为核心优势,广泛覆盖工业、汽车、消费电子等场景。该型号采用真空溅射薄膜工艺,相比传统厚膜电阻,在精度控制、噪声抑制和温度稳定性上具备显著差异,是小体积精密电路的理想选型。
标称阻值为47.5kΩ(代码标识“4752”,前三位为有效数字,第四位表示乘以10²),精度等级**±0.5%**——满足工业控制、传感器信号调理等对阻值误差要求较严格的场景,无需额外校准即可实现稳定电路性能。
额定功率62.5mW(0402封装典型规格),适配低功耗电路;工作电压额定值25V,需注意:实际电路中电压与电流的乘积不得超过额定功率(如25V下最大电流约0.526mA),避免过功率导致阻值漂移或失效。
温度系数**±50ppm/℃**,即温度每变化1℃,阻值变化±47.5kΩ×50×10⁻⁶=±2.375Ω。该参数确保电阻在-55℃至+155℃范围内阻值稳定,适合户外设备、工业高温模块等极端环境。
采用0402封装(英制尺寸,对应公制1005),实际尺寸约1.0mm×0.5mm×0.35mm,体积紧凑,可有效降低PCB布局空间,适配智能手机、智能穿戴、小型工业模块等高密度设计。
该电阻采用真空溅射镍铬薄膜工艺,相比厚膜电阻的丝网印刷工艺,具备三大核心优势:
工作温度范围**-55℃至+155℃**,覆盖工业级宽温需求,可满足汽车电子(如车身控制器)、户外监测设备等极端场景;湿度适应性为95%RH以下(无凝露),存储温度-65℃至+150℃,可长期稳定保存。
光颉对该型号完成多项行业标准测试:
AR02DTD4752因体积小、精度高、宽温稳定,广泛应用于:
建议实际功率不超过额定功率的50%(即31.25mW),提升长期可靠性;
该型号平衡了小体积与高性能,是精密电路设计中替代普通厚膜电阻的优选方案。
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