This part is a kind of semiconductor called B30H100G.

Function of this product has Switch-mode Power Rectifier.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

MBR30H100CT, MBRF30H100CT Switch‐mode Power Rectifier 100 V, 30 A Features and Benefits • Low Forward Voltage: 0.67 V @ 125°C • Low Power Loss/High Efficiency • High Surge Capacity • 175°C Operating Junction Temperature • 30 A Total (15 A Per Diode Leg) • These are Pb−Free Devices Applications • Power Supply − Output Rectification • Power Management • Instrumentation Mechanical Characteristics: • Case: Epoxy, Molded • Epoxy Meets UL 94 V−0 @ 0.125 in • Weight: 1.9 Grams (Approximately) • Finish: All External Surfaces Corrosion Resistant and Terminal Leads are Readily Solderable • Lead Temperature for Soldering Purposes: 260°C Max. for 10 Seconds • ESD Rating: Human Body Model = 3B Machine Model = C http://onsemi.com SCHOTTKY BARRIER RECTIFIER 30 AM [ ... ]

B30H100G PDF Datasheet Download