A thruster brake typically refers to an electro-hydraulic drum (block) brake that is released by an electro-hydraulic thruster. The thruster provides linear force to open the brake against spring pressure; when power is off, the springs apply the brake (fail-safe). Thruster brakes are common on cranes, hoists, and conveyors because they deliver high torque, tolerate harsh environments, and are easy to service.
A motor brake is usually an electromagnetic, spring-applied brake mounted on the motor (often at the rear endbell). It provides compact holding torque and fast engagement, making it popular for smaller hoists, positioning tasks, and compact drives.
The best choice depends on torque demand, available space, duty cycle, and service access. For heavy lifts or high-torque shafts, a thruster brake is often preferred. For compact designs and quick integration with motors, a motor brake may be ideal. Many critical systems use both: a motor brake for control and a larger brake for primary holding or emergency stops.