This part is a kind of semiconductor called 1SMB5920A.

Function of this product has SILICON ZENER DIODES.

Manufacturers : Bruckewell

Image and pinout :

Some of the text within the PDF file :

1SMB5913A-1SMB5956A Vz : 3.3 - 200 Volts PD : 3.0 Watts Features • Complete Voltage Range 3.3 to 200 Volts • High peak reverse power dissipation • Flat handling surface for accurate placement • Low leakage current • RoHS compliant package Mechanical Data • Case : SMB Molded plastic • Epoxy : UL94V-0 rate flame retardant • Lead : Lead Formed for Surface Mount • Polarity : Color band denotes cathode end • Mounting position : Any • Weight : 0.93 gram Packing & Order Information 3,000/Reel Graphic symbol MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25 °C ambient temperature unless otherwise specified. Symbol Parameter Maximum Steady State Power Dissipation at TL = 75 °C PD Measured at Zero Lead Length Derate Above 75 °C RθJL Thermal Resistance Fr [ ... ]

1SMB5920A PDF Datasheet Download