This part is a kind of semiconductor called MPP0921B.

Function of this product has Higher Power Rotary Servo Motors.

Manufacturers : Parker

Image and pinout :

Some of the text within the PDF file :

MPP / MPJ Series Servo Motors Catalog USA 96-029085-01 3M 02/08 Higher Power Rotary Servo Motors, with Low and High Inertia The “MaxPlusPlus” (MPP) series of brushless servo motors from Parker features a new design that offers lower inertia and higher power, all in a smaller motor package. These brushless servo motors are designed for the demanding applications found in today’s high-performance servo systems. The MPP motors feature segmented core technology, which can yield up to 40% higher torque per unit size than conventionally wound servo motors. “Potted” stators improve heat transfer for better thermal efficiency, resulting in increased torque at the motor shaft. High-energy neodymium magnets are employed for higher rates of acceleration. The “MaxPlus-J” (MPJ) series [ ... ]

MPP0921B PDF Datasheet Download