This part is a kind of semiconductor called 6MBI450U4-120.

Function of this product has IGBT Module.

Manufacturers : Fuji Electric

Image and pinout :

Some of the text within the PDF file :

SPECIFICATION Device Name : IGBT MODULE Type Name : 6MBI450U4-120 Spec. No. : MS5F 6020 Jan. 20 ’05 S.Miyashita Jan. 20 ’05 T.Miyasaka K.Yamada Y.Seki MS5F6020 1 14 a H04-004-07b Revised Records Date Classification Ind. Jan.-20 -’05 Enactment Content Applied date Drawn Checked Checked Approved Issued date T.Miyasaka K.Yamada Y.Seki Oct.-25-’05 Revision a Revised characteristics VCE(sat) (P4/14) S.Miyashita O.Ikawa K.Yamada T.Miyasaka MS5F6020 2 14 a H04-004-06b 1. Outline Drawing ( Unit : mm ) 6MBI450U4-120 2. Equivalent circuit 　　　　　　　　　　　　　　　　　　[Inverter]　　　　　　　　　　　　　　　　　[[TThheerrmmisteor]] 　　　　　②　　　　　　　　　　　　 ④　　　　　　　　 　　 [ ... ]

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