this the datasheet
Rated Voltage DC 12V DC 24V
Working Voltage DC 10.8~13.2V DC 21.6~26.4V
Rated Current/Phase 400mA(PEAK)
No. of Phase 2 Phase
Coil DC Resistance 5Ω/phase±7%
Step Angle 7.5°/step
Excitation Method 2-2 Phase excitation (Bipolar driving)
Insulation Class Class E insulation
Holding Torque 39.2mN·m 39.2mN·m
Pull-out Torque 23.2mN·m/800pps 17.4mN·m/2,000pps
Pull-in Torque 27.1mN·m/200pps 26.2mN·m/200pps
Max. Pull-out Pulse Rate 2,000pps 3,900pps
Max. Pull-in Pulse Rate 700pps 700pps
I forgot it and it worked for 20 minutes. the damn thing melt my mouse pad....
the resistance in windings was fine though.....
The power source that i feed it was 12v 1.5Amp , so i think was over kill the data sheet say Rated Current/Phase 400mA(PEAK) , so i have to use small amount of current