Applied Motion 834-HT23-401D Stepper Motor Manufacturer has replaced HT23-401D with HT23-601D. Fit, form and function are the same with both models. Country of origin on HT23-401D is Japan and on HT23-601D it is China. Leadtime is shorter on the recommended alternate and price is lower. Old Number New Number 834-HT23-401D 834-HT23-601D Please contact a Mouser Technical Sales Representative for further information. 5-0910-1