IronHorse MTDP series open drip-proof three-phase motors range in size from 1 to 50 hp at 1,800 rpm and 3, 5 and 7.5 hp at 3,600 rpm. Frame sizes are available from 143T to 326T. All models have a rolled steel frame; frame sizes up to 256T have cast aluminum end bells, while frame sizes of 284T or larger have cast iron end bells. All frame sizes have a fixed base. The motors are cURus-certified and CE-approved.