... UL,CE,VDE.Our mainly product is stepper motor, synchronous motor, copper pipe and heat exchange for air- ... Heavy Industries, Japnaese TOTO, etc. Model20BYJ46-S1Phase4Rated Voltage12 DC.VResistance Per Phase300 Ω/PhaseStep Angle7.5 /85Reduction Ratio1 ... load pull-in Frequency≥500 HzInsulation Resistance≥50MΩ (DC.500)Dielectric StrengthCondition of AC, 600V, 1 mA ... 34 dB(A) 20BYJ46-S1 electric dc motor