The WSB-4XX electromagnetic power-off brake is a compact, high-performance fail-safe component designed for servo and stepper motors. With a rated torque of 4N·m, 84mm housing, and 15T spline shaft, this brake engages automatically when power is cut off, providing instant, secure holding torque to prevent equipment movement, making it ideal for vertical and precision applications. Constructed with high-quality copper coils, wear-resistant brake pads, and a corrosion-resistant chrome-plated housing, this brake offers long service life, low noise operation, and stable performance. The 15T spline shaft design ensures a secure fit with the motor shaft, and the compact form factor allows for easy integration into robotics, medical equipment, CNC machines, and automation actuators requiring reliable power-off holding and braking.