The NEMA 17 HS3401S Two‑Phase Hybrid 42 Stepper Motor – a high‑precision, compact solution engineered for demanding motion‑control projects. With a 1.8° step angle and a robust 290 mN·m holding torque, this motor delivers smooth, accurate positioning for a wide range of Arduino‑based and industrial applications. Ready to ship from SoftTech Supply in Kigali, Rwanda.

Key Specifications

• Number of phases: 2


• Rated voltage: DC 3.4 V


• Phase resistance (20 °C): 3.4 Ω ± 15 %


• Holding torque: 290 mN·m


• Step angle: 1.8° (0.09 rad)


• Nominal current: DC 1.0 A per phase


• Phase inductance (1 kHz): 5.4 mH ± 20 %


• Maximum no‑load operating frequency: 2000 pps


• Maximum no‑load start‑up frequency: 1400 pps


• Insulation resistance: ≥100 MΩ (DC 500 V)


• Insulation class: Class B


• Moment of inertia: 43.2 g·cm²


• Electrical strength: AC 600 V / 1 mA / 1 s

Typical Applications

• Arduino and MEGA 2560 robotic arms


• 3D printer extruders and XYZ axes


• CNC milling and routing machines


• Precision camera sliders and pan‑tilt units


• Automated valve and gate control systems


• DIY motion‑control projects using ESP8266, GSM, or GPS modules


• Educational kits for stepper‑motor fundamentals