Product Description:

The PMB33F-00200-02 is a brushless servomotor built by Pacific Scientific and positioned within the PMB Brushless Servomotors series. In factory automation, it drives positioning tables, feeders, or indexers by converting controlled electrical input from a servo drive into precise and repeatable rotary motion. The motor’s permanent-magnet design, low inertia, and standard mounting face simplify integration where high response and tight speed regulation are required. It supports 240 Vac operation and is intended for duty cycles that demand continuous stall torque without thermal runaway.

Mechanical and electrical details describe its performance envelope. The frame conforms to NEMA Size 34, giving a 3.4-inch square mounting flange that aligns with common servo gearheads. At 240 Vac, the winding draws a nominal stall current of 11.0 ARMS, which is used to size the drive amplifier and estimate continuous heat generation. Rotor position feedback is provided by a resolver, allowing immunity to electrical noise and high-temperature operation compared with optical encoders. Power and feedback leave the housing through flying leads with MS connectors, simplifying connection without opening the enclosure. For over-temperature protection, the stator includes a PTC thermistor, which opens an external circuit when windings exceed their safe limit.

Additional construction features support application flexibility. A flat shaft interface supplies a positive anti-rotation surface for set-screw couplings, avoiding keyway stress in compact mechanisms. The electromagnetic section uses a stack length multiple of 3, balancing torque density against overall motor length for installations with limited depth behind the mounting face. As built by Pacific Scientific, the motor follows the configuration style used across the PMB Brushless Servomotors line. The longer lamination stack helps increase torque capacity while keeping the motor within the same mounting class.