All motor brakes installed on Compumotor's SM, BE, Neometric, J-Series, and Apex family servo motors are rated to a maximum operational temperature of 140°C.
This temperature value was obtained through tests conducted with the motor brake mated to a test motor (at a constant 100°C motor case temperature), while incorporating an average temperature increase of 40°C, which is how much hotter the brake itself becomes during sustained engagement.