In discussions about robotic joint actuator modules, the motor, gearbox, encoder, brake, and driver usually receive the most attention, while the braking dissipation module is often underestimated. In real engineering projects, many 48V joint systems operate normally during no-load commissioning. However, once they enter conditions involving large inertia, rapid acceleration and deceleration, gravity-axis lowering, or frequent backdriving, issues such as DC bus overvoltage, driver alarms, unexpected shutdowns, and even thermal failures of power devices begin to appear.