Product Description:

The PMB33F-20100-03 is a brushless servomotor built by Pacific Scientific and placed in the PMB Brushless Servomotors series. As a permanent-magnet AC motor, it converts drive commands into controlled torque for positioning or speed regulation in pick-and-place modules, light conveyors, and other automated machinery. This type of motor is commonly paired with a servo amplifier that regulates current and uses feedback to correct speed or position error during motion. The housing follows NEMA dimensional rules, so it can fit standardized motor mounts and gearheads without requiring a special adapter plate.

The motor body corresponds to NEMA Size 34, giving it a 3.4-inch square face that fits common motion-control brackets and compact axis assemblies. Its electromagnetic stack draws a nominal stall current of 11.0 ARMS when supplied from 240 VAC, indicating the current needed to produce stall torque without shaft rotation. Power and feedback exit the stator through flying leads with AMP connectors, which simplify wiring where preterminated cable ends are preferred. That arrangement also helps when the motor must connect to harnesses that already use AMP-style mating hardware. Rotor position is tracked with resolver feedback, so the servo drive receives angle information that remains reliable in electrically noisy environments. Mechanical coupling to the load is established by a square key on the shaft, which provides positive torque transfer instead of depending on friction alone.

The unit ships with a shaft seal and a PTC thermistor. The seal helps limit lubricant escape and contaminant entry, while the thermistor monitors winding temperature for overload protection. It uses a stack length multiple of 3, meaning three standard laminations are stacked to increase continuous torque without changing the flange size. The added stack length increases active magnetic material while keeping the face dimensions consistent with the motor's size class.