缩写TA是自耦变压器，最好还是看看元器件上得标识
TA 2SC5431EB NEC SC59 npn RF fT 4.3GHz 12V 60mATA GDZ4V12B-V Vis SOD-323 200mW 12V ZenerTA RT9261B-25CB RT SOT23-5
RT1681 SOT25 PDF
