The Square DC Electromagnetic Brake is a compact and reliable static brake designed for use with 39mm Nema 16 and 42mm Nema 17 stepper motors. Built with a metal shell, this power off brake engages automatically when power is cut, providing secure holding torque to keep your motor shaft locked in place. It delivers a rated torque of 0.45Nm and operates on either 12V or 24V DC, making it versatile for a wide range of motion control applications. With a rated power of 4W and a rated current of 0.5A, it runs efficiently within a 50% rated working system. The 39x39mm flange size and 31mm mount distance allow for straightforward integration, while the 27mm height keeps the overall assembly compact. The 5x4.5mm D shaped shaft hole ensures a secure and precise fit onto compatible motor shafts. Whether used in CNC machines, robotics, or other automated systems, this electromagnetic brake offers dependable performance and easy installation.