This part is a kind of semiconductor called 1N5407.

Function of this product has 3.0 Ampere General Purpose Rectifiers.

Manufacturers : Fairchild Semiconductor

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Some of the text within the PDF file :

1N5400-1N5408 Discrete POWER & Signal Technologies 1N5400 - 1N5408 Features • • • 3.0 ampere operation at TA = 75°C with no thermal runaway. High current capability. Low leakage. 1.0 min (25.4) Dimensions in inches (mm) DO-201AD COLOR BAND DENOTES CATHODE 0.375 (9.53) 0.285 (7.24) 0.210 (5.33) 0.190 (4.83) 0.052 (1.32) 0.048 (1.22) 3.0 Ampere General Purpose Rectifiers Absolute Maximum Ratings* Symbol IO if(surge) PD RθJA Tstg TJ TA = 25°C unless otherwise noted Parameter Average Rectified Current .375 " lead length @ TA = 75°C Peak Forward Surge Current 8.3 ms single half-sine-wave Superimposed on rated load (JEDEC method) Total Device Dissipation Derate above 25°C Thermal Resistance, Junction to Ambient Storage Temperature Range Operating Junction Temperature Value 3.0 [ ... ]

1N5407 PDF Datasheet Download