Product Description:

The PMB33F-20100-02 is a brushless servomotor produced by Pacific Scientific in the PMB Brushless Servomotors series. Classified as a PMB Series brushless servomotor, it is intended for use in industrial automation where precise rotary motion, tight velocity regulation, and quick torque transients are critical. The unit connects to a matched drive that excites its three-phase windings while resolver feedback closes the position loop, making it suitable for pick-and-place heads, carton formers, and small gantry axes operating around the clock.

With a frame coded as NEMA Size 34, the motor’s flange and pilot diameter align with common motion-control gearheads and brackets used on compact machinery. During locked-rotor testing, it draws 11.0 ARMS at 240 VAC maximum, a value used to size the drive current limit for the continuous stall torque requirement. Rotor position is reported by a Resolver, allowing high-temperature operation and good immunity to electrical noise when compared with optical encoders. Output torque is delivered through a Square Key on the shaft, giving positive engagement with couplings and pulleys. Power and feedback conductors exit the housing as Flying leads with AMP connectors, which allows direct connection without special mating hardware.

For thermal safeguarding, the winding set incorporates a PTC Thermistor that rises sharply in resistance as coil temperature approaches its limit, enabling the drive to cut current before insulation is damaged. The electromagnetic section uses a stack length multiple of 3, which increases active iron volume and raises continuous torque without altering the original frame footprint. The motor is part of the PMB Brushless Servomotors line from Pacific Scientific. Mechanical dimensions, feedback pinouts, and lead colors remain consistent across adjacent frame lengths.