ABB OA Series auxiliary contact is suitable for use with OS/OT series switches. Brand Name|ABB#MFR Part Number|OA3G01#UPC|662019754970#UNSPSC|39122221#Item|Auxiliary Contact#Series|OA#Suitable For Use With|OS/OT Series Switches#Dimensions|30 mm Height x 40 mm Width x 11 mm Depth