S33ANNH-RNNE-00 by Pacific Scientific

The S33ANNH-RNNE-00 servo motor is built by Pacific Scientific for the S Brushless Motors series. This model is a six-pole, neodymium-magnet brushless servo unit designed to deliver repeatable shaft position and velocity in automated machinery. High-voltage windings allow the motor to connect directly to drives that support elevated DC-bus levels, while the NEMA frame mounting interface provides compatibility with standard gearboxes and motion stages used in industrial equipment.

At zero speed, the motor can sustain a continuous load of 5.3 Nm, which is the mechanical limit for holding a static axis without overheating. For dynamic events such as acceleration or impact damping, it tolerates a peak torque of 15.3 Nm for brief periods. The stator winding has an inductance of 17.0 mH, which smooths current transients and influences the servo loop bandwidth. A phase-to-phase resistance of 5.2 ? affects copper losses and the terminal voltage needed at rated current. With a torque constant of 1.5 Nm/ARMS, each ampere of RMS phase current produces proportional mechanical output. A back-EMF constant of 0.94 VRMS/rad/sec helps determine whether the inverter can overcome the generated voltage at the commanded speed.

The housing has an ingress protection rating of IP65, so it resists dust and low-pressure water jets when paired with user-supplied shaft-sealing hardware. The motor is supplied without a holding brake, so external clamping is required when a stationary load must be secured after power is removed. Its total mass is 6.5 kg, making it suitable for installations that require a balance between manageable weight and thermal capacity. Dynamic response is supported by a rotor inertia of 0.48 × 10?³ kg·m², allowing rapid acceleration while supporting stable control. A size 21 frameless resolver supplies primary position feedback to the connected drive. Interconnectron connectors provide detachable power and feedback connections, and the three-stack stator uses winding code A for the NEMA 34 frame platform.