This part is a kind of semiconductor called RF-300FA-12350.

Function of this product has Motor.

Manufacturers : MABUCHI MOTOR

Image and pinout :

Some of the text within the PDF file :

RF-300FA (TORQUE UP TYPE) Precious metal-brush motors OUTPUT : 0.02W~1.8W (APPROX) Typical Applications Office Automation Equipment : CD/DVD-ROM Drive WEIGHT : 22g (APPROX) VOLTAGE MODEL OPERATING RANGE NOMINAL NO LOAD SPEED r/min CURRENT A SPEED r/min AT MAXIMUM EFFICIENCY CURRENT A TORQUE mN·m g·cm OUTPUT W mN·m STALL TORQUE g·cm CURRENT A RF-300FA-11420 RF-300FA-12350 1.7~6.0 1.5~6.0 3V CONSTANT 3V CONSTANT 2900 3500 0.017 0.022 2320 2830 0.068 0.093 0.42 0.48 4.3 4.9 0.10 0.14 2.11 2.51 22 26 0.27 0.39 Also available with terminals (without leadwires). DIRECTION OF ROTATION 1.9 REF. 2.5 REF. (–)BLACK ° 60 (+)RED ␾ 16.5 ␾ 6.45 JIS M1.7 ✕ 0.35 TAPPED HOLE 6 PLACES Usable machine screw length 1.1 max. from motor mounting surface. ␾ 2.0 1.0 MA [ ... ]

RF-300FA-12350 PDF Datasheet Download