This part is a kind of semiconductor called IN5402.
Function of this product has Standard Recovery Diodes.
Manufacturers : Naina Semiconductor
Image and pinout :

Some of the text within the PDF file :
www.DataSheet.co.kr Naina Semiconductor emiconductor Ltd. General Purpose Rectifier Rectifier, 3.0A Features • • • • • Diffused junction High efficiency Low forward voltage drop Low power loss High surge current capability 1N5402 Mechanical Characteristics • Case: Molded Plastic • • • • Cathode indicated by Polarity band Mounting position: Any Terminals: Finish Tin plated, , Solderable per MIL-STD-202, Method 208 Weight: 0.33 grams (approx.) DO-201AD 201AD (DO-27) ( Maximum Ratings (TA = 250C unless otherwise specified specified) Parameter Maximum repetitive peak reverse voltage Maximum RMS voltage Maximum DC blocking voltage Maximum average forward output current @ TA = 1050C Peak forward surge current (8.3ms) ms) single half sine sine-wave superimposed on rated l [ ... ]
IN5402 PDF Datasheet Download
