Product Description:

The PMB33C-20201-00 is a brushless servomotor manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. It converts three-phase electrical power into controlled rotary motion for indexing tables, pick-and-place heads, and other automated axes that demand accurate positioning and repeatable torque. When paired with a matched digital drive, the motor provides rapid acceleration and fine velocity regulation that help maintain cycle times and product quality in industrial automation cells. This operating profile is well suited to repeated start-stop motion, short indexing moves, and coordinated axis tasks where predictable response matters as much as peak output in automated production equipment.

The frame follows the NEMA Size 34 pattern, so standard mounting brackets and gearboxes align without modification in many machine layouts. At 240 Vac, the nominal stall current is 3.8 ARMS, a value used to size the drive power stage and manage winding temperature during low-speed or holding operation. All power and feedback conductors exit through flying leads with MS connectors, which keeps external connections straightforward while preserving the sealed housing and allowing the motor body to remain compact. Rotor commutation relies on a Hall sensor that supports trapezoidal or sinusoidal current control, giving the drive the position information needed for proper phase switching. The shaft uses a square key so pulleys or couplings can remain secure during frequent reversals and other high-load moves.

The magnetic stack uses a length multiple of 3, increasing continuous torque within the same frame without adding diameter, which helps keep system inertia favorable for fast moves. Because the unit is supplied as a Standard Motor, it uses the regular configuration for this model line rather than a special build. The Brushless Servomotor design operates without brushes, which reduces routine maintenance in continuous-duty equipment and avoids wear associated with brush contact. This arrangement is useful in machinery that runs for long periods and depends on steady servo response.