This part is a kind of semiconductor called 57BYGH76-280-4B.

Function of this product has PLANET GEAR STEPPER MOTOR.

Manufacturers : ZBM

Image and pinout :

Some of the text within the PDF file :

ZBM www.sh-jingkong.com 52PAxxxGF/57BYGH PLANET GEAR STEPPER MOTOR Housing Material:Metal Backlash at No-Load:≤1. 5º Bearing at Output：Ball or Sleeve Permissible Overhung Load:≤20kg Permissible Thrust Load:≤10kg Max.Radial Play:≤0.05mm Max.Thrust Play:≤0.3mm 2010-2011 Gear Box Data Number of Stage Exact Reduction Ratio Efficiency Max Permissible Torque # 1:X % Nm 1 2 3 4 90% 6 12 49.5 8 16 25 32 81% 12 24 64.5 50 64 100 128 200 256 73% 24 44 79.5 312.5 400 512 Moment Permissible Torque NM Gear Box Length (L) mm Motor specifications Model 57BYGH41(M)-144-4A/B 57BYGH51(M)-144-4A/B 57BYGH56(M)-100-6A/B 57BYGH56(M)-280-4A/B 57BYGH76(M)-200-6A/B 57BYGH76(M)-280-4A/B Step Angle Length Phase Phase (Ld) Voltage Current Phase Resistance Phase Inductance Holding [ ... ]

57BYGH76-280-4B PDF Datasheet Download