The 17HS3430 is a compact, energy-efficient Nema 17 stepper motor featuring standard faceplate dimensions of 42.3mm x 42.3mm. Utilizing a shortened motor body (Approx 34mm length), it is explicitly engineered for low-current, weight-sensitive applications. Delivering a holding torque of 0.28Nm while drawing a remarkably low 0.4A per phase, this motor is a popular choice for portable electronics, compact automation devices, and lightweight 3D printer extruders where minimizing power consumption and heat generation is paramount.

Specifications

• Model Number: 17HS3430
• Frame Size: Nema 17 (42.3mm x 42.3mm)
• Holding Torque: 0.28Nm (Approx 40 oz-in or 2.8 kg-cm)
• Rated Current: 0.4A per phase
• Configuration: 4-Wire Bipolar
• Step Angle: 1.8℃ (200 steps per full revolution)
• Motor Body Length: Approx 34mm (Short profile)
• Shaft Type: D-Cut (Flat surface to prevent gear or pulley slippage)
• Shaft Diameter: Standard 5mm
• Phase Resistance: High internal resistance (optimized for low-current drivers)

Features

• Low-Power & Low-Heat: Drawing only 0.4A allows this motor to operate at significantly lower temperatures than its high-current counterparts. It minimizes the risk of warping 3D-printed brackets or melting nearby plastic components.
• Compact, Lightweight Profile: At a length of just 34mm, this motor significantly reduces moving mass when mounted directly onto mobile printer gantries or robotics arms, enabling faster accelerations with less mechanical inertia.
• D-Shape Drive Shaft: Equipped with a machined flat indentation along the $5\text{mm}$ output shaft. This design ensures that grub screws on GT2 timing pulleys, drive gears, or couplers lock down firmly, eliminating rotational slippage.
• Universal Driver Compatibility: Runs exceptionally well with standard stepper drivers such as the A4988, DRV8825, and Silent TMC modules (TMC2208/TMC2209), and is gentle on budget, integrated control boards.

Common Applications

• Bowden & Lightweight Direct-Drive Extruders: Powering filament feeding mechanisms in 3D printers where heavy torque is unnecessary but minimizing toolhead weight is vital.
• Miniature Laser Engravers: Controlling the X and Y axes on small-scale desktop laser cutters that transport lightweight optical sleds.
• Medical & Laboratory Automation: Operating micro-fluidic pumps, automated pipettes, or rotating test-tube carousel trays.
• Pan-and-Tilt Camera Mounts: Providing precise rotational positioning for lightweight surveillance cameras or security sensor arrays.

Usage & Tuning Tips

• VREF Calibration is Critical: Because this motor has a low 0.4A rating, you must dial down the current limit potentiometer (VREF) on your stepper driver before powering up the system. Leaving a driver configured to a standard 1.0A baseline will send excessive current into the 17HS3430, causing it to overheat instantly and permanently damage its internal windings.
• Never Disconnect While Powered: Never unplug the 4-wire connector from the motor or the driver board while the power supply is turned on. Doing so creates a massive inductive back-EMF voltage spike that will immediately fry the output MOSFETs of your driver.
• Microstepping Recommendations: Running this motor at 1/16 microstepping provides a fantastic balance of fluid, quiet motion and high structural positioning accuracy. Avoid ultra-high microstepping tiers (like 1/124 or 1/256) unless running very light loads, as incremental holding torque drops off between microsteps.
• Passive Cooling Profile: Thanks to its 0.4A draw, this motor generally runs cool to the touch. If your application requires running it in a warm, enclosed box and the motor body exceeds 60℃, a small stick-on aluminum heatsink applied to the back of the motor casing is usually more than enough to maintain safety.