Product Description:

The PMB33C-00201-03 is a brushless servomotor in the PMB Brushless Servomotors series. Designed for use with external servo amplifiers, it converts three-phase electrical input into controlled rotary motion. A separate amplifier handles commutation and current regulation for closed-loop motion control. Its brushless design supports smooth low-speed control and repeatable starts and stops. The motor is suited for pick-and-place modules, light conveyor sections, and small indexing tables where repeatable positioning is required in automated production lines.

Electrical termination is made through flying leads with MS connectors, allowing either cabinet wiring or quick-disconnect plugs at the machine frame. The mechanical envelope corresponds to NEMA size 34, so the face-mounting holes follow the 2.75-inch square pattern common to small gear reducers and linear stages. On a 240 VAC bus, the winding draws a nominal stall current of 3.8 ARMS, which supports load holding at zero speed without exceeding the motor's thermal limits. Rotor position feedback comes from an internal Hall sensor, which provides six commutation signals in each electrical cycle for trapezoidal or sinusoidal control. Output torque is transferred through a shaft with a flat shaft surface, allowing clamp or set-screw couplings to resist slip without the extra depth required for a keyed hub.

Factory options include a shaft seal and a PTC thermistor. The seal helps protect the bearing area, and the thermistor reports winding temperature so the drive can reduce current before insulation limits are reached. The magnetic circuit uses a stack length multiple of 3, which increases torque while preserving the motor's mounting footprint. The motor is part of the PMB series brushless servomotor line from Pacific Scientific. Related models in the same line use similar electrical constants and inertia ranges.