This part is a kind of semiconductor called BD233.

Function of this product has NPN Plastic-Encapsulate Transistors.

Manufacturers : MCC

Image and pinout :

Some of the text within the PDF file :

MCC TM Micro Commercial Components
  omponents 20736 Marilla Street Chatsworth    !"# $ %    !"# BD233 BD235 BD237 Features • Power Dissipation: PCM =1.25W, Ta=25ć • Collector Current : IC=2A • Complement to BD234/236/238 respectively • Lead Free Finish/RoHS Compliant (Note1) ("P" Suffix designates RoHS Compliant. See ordering information) • Epoxy meets UL 94 V-0 flammability rating • Moisure Sensitivity Level 1 • Marking: Type Number Maximum Ratings* Symbol Rating Rating Unit VCEO Collector-Emitter Voltage BD233 BD235 BD237 45 60 80 V VCBO Collector-Base Voltage BD233 BD235 BD237 45 60 100 V VCER Collector-Emitter Voltage BD233 BD235 BD237 45 60 100 V VEBO IC ICP Emitter-Base Voltage Collector Cu [ ... ]

BD233 PDF Datasheet Download