Features:CW5045 driver fits for NEMA17-23two phase or four phase hybrid stepping motors whose current is less than 4.5A.Due to double polarity constant current chopping wave drive technology, it can drive by motor more smoothly and has better high-speed performance than other driver.It has automatic half current reduction, overheat protection, error connect protectionfunctions.Better application effect in equipment of low cost, low vibration, small noise, high precision and high speed.Suitable for many kinds of automatic equipment and instruments, such as marking machine, labeling machine, cutting machine, packaging machine, plotter, engraving machine, CNC machine tools, etc.Specifications:Model: CW-5045Input Voltage: 24V~50VDCMax. Output Current: 4.5AProtection: Overheat protection,lock automatic half current, error connect protectionHumidity: <90%Fit for: NEMA17-23 two or four phase stepper motors (current <4.5A)Quantity: 1pcWeight: 275g(approx.)Package Includes:1 x Driver