Insulation Class
This is a heat-resistant grade of motor winding specified by JIS.
The stepper motor is Class B-insulated and the permissible temperature of the winding is 130 °C max. At this time, the temperature on the motor surface is about 100 °C.
(UL/CSA approved condition is Class A insulation 105 °C. When applying for a set as a UL/CSA approved product, please use it at a motor case temperature of 75 °C max.)