The DHM3 brake is fricative brakes,which are auto-matically set to work when an AC power lost occurts.They are mainly used with Y series motort to create YEJ series three-phase motors. it's widely applicable in machine tools and in machineries for metal-lurgy,construction,chemistry,food-prompt and accurate braking effect. Because of its small size,light weight,low noise and high reliab-ility,it is widely accepeted as an ideal piece of automation equipment .It can be add protection circle to increase protection grade:IP54.