Product Description:

The PMB33F-20200-02 brushless servo motor belongs to the PMB Brushless Servomotors series produced by Pacific Scientific. The motor is designed to deliver controlled torque and speed for automated axes that require repeatable positioning, enabling integration into pick-and-place gantries, electronic assembly fixtures, and light material-handling equipment. By combining a permanent-magnet rotor with low-inertia construction, it operates as the electromechanical interface between a digital drive and the driven mechanical load, converting command currents into rotary motion with closed-loop feedback. This layout supports responsive acceleration and stable motion control in compact automation systems.

The housing conforms to the NEMA Size 34 envelope, so front-face mounting holes and shaft height match common stepper and servo packages. At a supply of 240 VAC, the armature can accept a nominal stall current of 11.0 ARMS, indicating the continuous phase current permitted without exceeding thermal limits. Power exits through flying leads terminated with detachable MS connectors, which simplify cable connection while maintaining environmental sealing. Rotor position is reported by a resolver, providing feedback that remains dependable in electrically noisy environments and at elevated operating temperatures. Mechanical power is transmitted through a shaft with a square key, which provides positive torque transfer to pulleys, couplings, or gearheads.

Thermal protection is embedded through a PTC thermistor, which rises sharply in resistance as winding temperature approaches rated limits so the drive can reduce current before insulation damage occurs. The magnetic section uses a stack length multiple of 3, which increases active material without changing the mounting footprint. That approach helps raise torque capability while preserving compatibility with equipment built around the same frame size. The result is a motor arrangement suited to repetitive start-stop cycles and other motion tasks that demand compact dimensions with controlled thermal behavior.