This part is a kind of semiconductor called M42SP-5K.

Function of this product has Stepping Motors.

Manufacturers : MITSUMI

Image and pinout :

Some of the text within the PDF file :

MITSUMI Stepping Motors M42SP-5, -5K Stepping Motors OUTLINE "M42SP-5" has the holding torque of 94.1mN · m, the pull-out torque of 46.10mN · m/200pps, and the pull-in torque of 45.6mN · m/200pps (24V DC), which are highest torques in the outer diameter ø42 model series. "M42SP-5K" implements such quick response as the holding torque of 85.0mN · m, the pull-out torque of 65.0mN · m/800pps, and the pull-in torque of 76.0mN · m/200pps (24V DC). In addition, it provides an extremely quiet running environment. FEATURES 1. High output torque (M42SP-5), quick response (M42SP-5K). 2. Superior running quietness and stability. 3. Step angle : 7.5˚. 4. Excellent responsiveness acquired. USES Printers, multifunction machines, copy machines, FAX, and such. MITSUMI S [ ... ]

M42SP-5K PDF Datasheet Download