Product Description:

The S33HSNA-RNNM-02 is a 6-pole neodymium-magnet brushless servo motor produced by Pacific Scientific for the S Brushless Motors series. As a torque-generating element in industrial automation, it couples to a drive to position machine axes with high repeatability. The unit’s frameless resolver supplies real-time rotor angle to the controller, allowing tight velocity and position loops for packaging, conveying, and electronic assembly equipment.

The motor delivers a continuous stall torque of 5.3 Nm, providing constant load support without thermal overload, while its peak capability reaches 15.3 Nm for short accelerations. With a torque constant of 0.9 Nm/ARMS, each ampere of phase current produces nearly one newton-meter, which simplifies drive sizing. Electrical response is influenced by a line-to-line inductance of 6.3 mH, and the winding resistance is 2.1 ohms, so current-loop behavior and heat generation can be predicted more accurately. The three-stack H winding supports these ratings, and the absence of a holding brake keeps inertia low for rapid reversals. Power and feedback exit through a motor-mounted MS connector, which reduces wiring complexity.

The housing follows the NEMA 34 frame standard, which helps the motor fit equipment built around that mounting footprint. A rotor inertia of 0.48 kg·m² × 10⁻³ allows fast speed changes without demanding excessive drive current, and the overall mass is 6.5 kg, which helps damp vibration when the motor is base-mounted. Back electromotive force is characterized by a voltage constant of 0.56 VRMS/rad/sec, giving predictable drive voltage requirements across the speed range. There is no shaft seal, so installations must keep contaminants away from the output shaft. The size-21 frameless resolver is the only feedback device, and no secondary transducer is included.