This part is a kind of semiconductor called 85BYGH450B-06.

Function of this product has Stepper Motor.

Manufacturers : KySan

Image and pinout :

Some of the text within the PDF file :

Fax Orders to 650-960-3875 Step Angle 1.8°±5% Insulation Resistant 500V DC 100MO Min Insulation Strength 50Hz 1Minute 500V Min Ambient Temperature -20ºC~+50ºC Temperature Rise 80ºC Max Shaft Radial Play 0.02mm Max Shaft End Play 0.1-0.3mm Stepper Motor HB Stepper Motors 85BYGH Series HB Stepper Motors Kysan # MFG# No.of Voltage Phase (V) 1127001 1127002 1127003 1127004 1127005 1127006 1127007 1127008 1127009 1127010 1127011 1127012 1127013 1127014 1127015 1127016 1127017 1127018 1127019 85BYGH450 85BYGH450A-01 85BYGH450A-02 85BYGH450B-01 85BYGH450B-02 85BYGH450C-01 85BYGH450C-02 85BYGH450A-04 85BYGH450A-06 85BYGH450A-07 85BYGH450A-08 85BYGH450A-09 85BYGH450B-03 85BYGH450B-04 85BYGH450B-05 85BYGH450B-06 85BYGH450B-07 85BYGH450C-03 85BYGH450C-04 4 4.4 4 4.4 4 4.4 4 6.4 4 2.8 4 [ ... ]

85BYGH450B-06 PDF Datasheet Download