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0603WAF1201T5E 是 UNI-ROYAL(厚声)推出的一款厚膜贴片电阻,封装为 0603(约 1.6 mm × 0.8 mm),标称阻值 1.2 kΩ,精度 ±1%,额定功率 100 mW,额定工作电压 75 V,温度系数(TCR)±100 ppm/℃,工作温度范围 -55℃ ~ +155℃。该器件适用于空间受限且对成本和可靠性有一定要求的通用电子设备。
需要特别说明的是电阻的额定工作电压与耗散功率必须同时满足才能安全使用。按 P = V^2 / R 计算,当在 1.2 kΩ 上施加 75 V 时,耗散功率约为 4.7 W,远超 0.1 W,必然损坏器件。因此在设计中应以功率限制为准:按额定功率 0.1 W 计算,该阻值允许的最大安全电压约为 sqrt(P×R) ≈ 10.95 V。实际电路中请确保任一元件上的电压或功率均不超过其额定值并留有裕量。
TCR 为 ±100 ppm/℃,意味着温度变化 100℃ 时电阻可能变化约 ±1%。在典型工作温度范围(-55℃ 到 +155℃,跨度 210℃)内,累计温漂可能接近 ±2.1%。厚膜电阻在成本、尺寸和通用性上有优势,但其长期稳定性与噪声性能通常不及金属薄膜/金属化膜电阻,若电路对长期漂移或超低噪声敏感,应考虑更高规格的替代品。
0603 封装适合自动贴装与回流焊工艺。建议:
适用于:移动设备、消费电子、工业控制、传感器接口、拉/下拉电路、分压器与滤波网络等需要小型化、经济型电阻的场合。对于需要更低温漂或更高精度的测量前端,可考虑采用金属薄膜或专用精密电阻。
总结:0603WAF1201T5E 是一款适合通用电子产品的小型厚膜贴片电阻,兼顾成本与尺寸优势,设计使用时请重点关注功率与电压匹配以及温漂对电路精度的影响。若需我提供封装尺寸图、推荐 PCB 焊盘或代替型号比较,可继续说明具体需求。
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Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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