Two-Stage Torque Limiter is developed for the actuator of anautomated hatchback door of an automotive. It requires two functions,damping and safety protection. These two mechanisms are packaged in one component.

During the normal operation when opening and closing the hatchback door, the torque of 0.2N·m is always applied to assist stable movement of the hatchback door. Upon overload situation, the 2nd stage torque limiting mechanism of 4.0N·m is activated to prevent damage of the motor and other actuating devices.
The tolerances of the slipping torque is within 10%.

Parameter Name	Parameter Value
Operation	mechanical
Other characteristics	safety
Torque (Nm)	0.2 - 4
Rotational speed (rpm)	160 - 600