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Specifications: ●MicrIsteps: 256 segments ●Model: Stepper Motor Driver TMC2208 ●Drive current: 1.4A ●Peak current: 2A ●Voltage range: 4.75V-36VSize: TMC2208 (LWH): 20 x 15 x 11 mm/ 0.78" x 0.59 x 0.43 Heat Sink (LWH): 9 x 9 x 12 mm/ 0.35" x 0.35" x 0.47" Please Kindly Note: ● Make sure not to connect the motor when measuring voltage, otherwise driver will burn out. ●When used on Ramps1.4 or MKS Gen, please remove the 3 jumpers under socket. ●Pay attention to direction, don't insert wrongly, or it will burnt out. ● The motor direction is opposite to that of A4988 and DRV8825, please adjust the firmware or adjust the motor wiring if you want to replace A4988. Package Includes: ●5 x TMC2208 Driver ●5 x Heat Sink●1 x Screwdriver Driver