Electromagnetic Power-Off Brake
Spring Applied brakes stop or hold a load when electrical power is either accidentally lost or intentionally disconnected. In the past, some companies have referred to these as "fail safe" brakes. These brakes are typically used on or near an electric motor. Typical applications include robotics, holding brakes for Z axis ball screws and holding brakes for servo motors. Many custom designs are available and can be made for use with different motor applications.