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MHT150CGCT 为 MEIHUA(美华) 出品的 1206 封装黄绿色发光二极管,透明透镜,发光颜色黄绿色(峰值 575nm)。器件在典型正向电流 20mA 下,发光强度约 57 mcd,发光角度宽达 130°,适用于指示、面板指示与一般背光场合。
电路设计建议:必须串联限流电阻以控制电流。例:5 V 系统时,为保证不超过 20 mA,按最小 Vf 1.75 V 计算 R≈(5−1.75)/0.02≈162.5 Ω,常用 180 Ω。3.3 V 系统常用 82 Ω 或 100 Ω。电阻功耗 P≈I^2R,安全裕度充足。
1206(3216 米制)表贴封装,透明圆顶/平面透镜,有利于大视角分布。推荐遵循厂商或 IPC 标准的 PCB 焊盘尺寸与锡膏印刷,避免过多铜箔导致焊点不充分。
工作环境温度范围宽,但高温下需对正向电流做降额处理以延长寿命。焊接推荐采用符合 J-STD-020 的回流工艺,Pb-free 峰值温度 ≤260℃,尽量减少高温停留时间并避免多次回流。器件对湿度与静电敏感,未密封卷带在高湿环境下应烘烤处理后贴装;生产与测试过程注意 ESD 防护。
适合状态指示、家用电器面板、通信设备指示、仪表照明、一般电子玩具与指示灯条等。若用于汽车关键安全系统,请确认供应商的汽车级认证与额外可靠性试验。
选型时关注波长与光强的批次偏差(binning),以及在高温、低驱动电流下的亮度变化。为保证长期稳定,建议在 PCB 设计中保留热散空间、采用合适的电流限制和 ESD 保护,并在样件上做实际亮度与寿命验证。
总结:MHT150CGCT 以高可见性的黄绿色光、宽视角与标准 1206 封装,为通用指示和面板应用提供稳定可靠的光源选择。
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