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ERJ2RKF2493X是松下(PANASONIC)推出的0402封装通用型厚膜贴片电阻,针对小型化、低功耗电子设备设计,兼顾电气稳定性与成本控制,是消费电子、工业控制等领域的主流选型之一。该型号采用成熟厚膜印刷工艺制造,符合RoHS环保标准,适配自动化贴装生产线。
标称阻值为249kΩ,精度等级±1%,满足多数电路对阻值偏差的控制需求(如信号分压、反馈网络、基准电压校准等场景),避免因阻值误差导致的电路性能波动。
±100ppm/℃,表示温度每变化1℃,阻值变化约$249kΩ×100×10^{-6}=24.9Ω$,可满足一般环境温度波动下的性能稳定性(如户外工业设备的昼夜温差场景)。
覆盖**-55℃~+155℃**,符合工业级器件的温度要求,可适配车载电子(部分场景)、高温工业控制器等极端温度环境。
采用0402英制贴片封装(对应公制尺寸:长1.0mm×宽0.5mm×高0.4mm),具备以下特点:
在全工作温度范围内,阻值漂移受控于±100ppm/℃,经高温存储(155℃×1000h)、温度循环(-55℃~+155℃×1000次)测试后,性能无显著衰减。
厚膜电阻结构具备一定耐湿性能,可抵抗短时间潮湿环境(如湿度95%RH×1000h)影响,避免阻值漂移;表面镀锡处理提升抗腐蚀性,适配沿海或高盐雾环境(部分场景)。
焊接后机械强度可靠,可承受常规振动(10~2000Hz×2h)与冲击(1000m/s²×3次)测试,满足运输与使用中的振动冲击要求。
松下作为全球电子元器件龙头,ERJ2RKF2493X继承了其厚膜电阻的核心优势:
实际应用需结合电路条件进行降额设计:建议工作功率≤额定功率的80%(即80mW),环境温度≥125℃时需进一步降额,确保器件使用寿命与性能稳定。
该型号凭借紧凑封装、稳定性能与高性价比,成为小型化电子设备的优选电阻之一。
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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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