... motor driver current range: 1.5A-4.5A voltage range:24Vdc~48Vdc Output current: 1.3A-4.5AMircostepping: 1(1.8 ... the module on big metal shell, or use axle flows fan dispels the heat, to make the module run reliably for ... Stepper motor driver, Stepping motor driver,1.5A~4.5A, 24Vdc~48Vdc