The 42mm Permanent Magnet Power Off Brake is a reliable braking solution designed specifically for Nema 17 stepper motors. Operating on 24V DC, this compact brake engages automatically when power is cut, using the strong magnetic force of a permanent magnet to securely hold the friction plate in place and prevent unwanted shaft movement. When power is restored, the coil generates a counteracting magnetic field that releases the friction plate, allowing the shaft to rotate freely. With a braking torque exceeding 0.6 N·m and a fast 50ms response time, it delivers dependable stopping performance in time sensitive applications. The unit draws less than 5W of power and features a 42x42mm flange with a 5mm shaft hole, a mounting distance of 31mm, and a thickness of 32mm. Rated at Insulation Class B, it is well-suited for use in automation equipment, chemical processing, food machinery, machine tools, printing, packaging, and any application requiring reliable emergency braking during power failure.