S33GNNA-RNNC-00 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific S33GNNA-RNNC-00 is a 6-pole brushless servo motor from the S Brushless Motors series with a NEMA 34 frame and a weight of 6.5 kg. It has a continuous stall torque of 5.3 Nm, peak torque of 15.3 Nm, and utilizes a size 21 frameless resolver as its primary feedback device. The motor features 18-inch flying leads with MS connectors and no holding brake or shaft seal.
Internal Product Review
The S33GNNA-RNNC-00 is a 6-pole neodymium magnet brushless servo motor with 5.3 Nm continuous stall torque, making it a very capable choice for precise motion control. A size 21 frameless resolver and NEMA frame mounting support accurate feedback and straightforward machine integration. Peak torque of 15.3 Nm gives the motor strong dynamic performance for demanding servo axes.
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Product Description:
The S33GNNA-RNNC-00 servo motor produced by Pacific Scientific is part of the S Brushless Motors series. This six-pole neodymium-magnet brushless servo motor is intended for closed-loop motion axes where precise torque and speed control improve throughput and positioning accuracy. It follows the NEMA mounting pattern, allowing it to fit standardized machine frames, and it uses a Size 21 frameless resolver for primary feedback. Because no holding brake or shaft seal is built in, the motor is best suited for clean, dry installations that use external load-holding methods when power is removed.
With a continuous stall capability of 5.3 Nm, the motor can sustain rated torque without exceeding its thermal limits, while its peak torque of 15.3 Nm supplies additional acceleration for rapid indexing. A torque constant of 1.9 Nm/A RMS relates commanded current directly to torque output, simplifying current-loop tuning. The housing corresponds to the NEMA 34 frame size, providing compatibility with equipment designed for this mounting pattern. The magnetic stack has a three-stack configuration that increases torque capacity within the available motor length. G-type windings match the motor to drives that can accommodate its impedance and voltage constant of 1.19 V RMS/rad/s.
A phase inductance of 25.2 mH filters high-frequency current ripple, and a line-to-line resistance of 8.4 Ω establishes the thermal loss profile during continuous duty. The rotor inertia is 0.48 × 10⁻³ kg·m², allowing the axis to reverse direction quickly without imposing excessive load on the drive amplifier. The motor has an overall mass of 6.5 kg, making it suitable for gantry systems or robotic joints while providing enough mass to help damp vibration. Eighteen-inch flying leads terminated with MS connectors simplify electrical installation. The absence of secondary feedback devices also reduces the number of required wiring connections.
