Product Description:

The PMB33C-10101-03 is a brushless servomotor produced by Pacific Scientific within the PMB Brushless Servomotors series. It converts electrical energy into controlled rotary motion for automated axes that demand precise speed and torque regulation. The unit is intended for closed-loop drive systems used on packaging lines, pick-and-place arms, and other repetitive equipment in manufacturing environments. Its construction supports continuous duty while minimizing the maintenance requirements typical of brushed machines.

The mechanical interface begins with the NEMA Size 34 frame, which uses a 3.4-inch square flange and a standard bolt circle common to many motion platforms. Power, signal, and ground connections leave the stator as flying leads with AMP connectors, so cable terminations can be routed through tight enclosures without the depth required for a fixed receptacle. Thermally, the winding can hold 3.8 ARMS at stall when driven from a 240 Vac supply. This continuous current rating indicates the maximum steady-state load the motor can carry without overheating. Rotor orientation is detected by an internal Hall sensor, which provides six discrete transitions during each electrical cycle so the drive can commutate and apply torque from zero speed.

A round shaft simplifies coupling to belts, pulleys, or direct-drive clutches, and its surface is protected by a shaft seal that helps limit lubricant migration and keep airborne contaminants away from the bearings. Winding temperature is monitored by an embedded PTC thermistor, allowing the controller to reduce current or shut the motor down if hot spots approach their limit. The motor uses a stack length multiple of 3, which increases magnetic length and supports higher torque without enlarging the frame. These features make the unit suitable for repeated industrial motion where stable feedback, protected shaft hardware, and continuous-duty thermal behavior are important.