Product Description:

The P21NSXC-LSN-NS-03 is a two-phase stepper motor produced by Pacific Scientific within the POWERMAX II P Motors series. It converts command pulses from an indexer or micro-stepping drive into incremental shaft movement for precise positioning of slides, pumps, and small conveyors in industrial automation. Standard NEMA mounting and a smooth shaft facilitate coupling to pulleys or lead screws, while the balanced rotor and hybrid stack design help produce stable discrete positions without requiring feedback devices. This operating principle makes the motor suitable for applications that rely on repeatable open-loop motion and simple control architecture.

Its maximum static torque is 0.82 Nm, allowing the load to remain fixed when the windings are energized. Each electrical pulse advances the shaft by 1.8 degrees, delivering repeatable incremental motion. To excite the C-type windings, the drive must supply 3.5 A per phase; this current produces the magnetic field that turns the rotor. A winding inductance of 2.3 mH supports rapid current rise, which helps the motor respond to higher pulse rates and maintain useful mid-range torque. The package conforms to the NEMA 23 frame envelope, so it fits common brackets and gearheads used with size-23 motors.

The motor operates reliably from -20 °C to +40 °C, covering most shop-floor conditions without forced cooling. Windings carry insulation rated for 340 Vdc, and Class B materials support a 130 °C temperature index during continuous duty. Mechanical detents formed by the rotor teeth create a residual holding torque of 0.028 Nm when power is removed. The motor provides 200 full steps per revolution, which keeps open-loop positioning calculations straightforward for controllers and pulse generators. It also has one stack of laminations, standard construction, a receptacle connector, 100-megohm insulation resistance, and a winding resistance of 1.06 Ω.