Products for USB Sensing and Control
Products for USB Sensing and Control

140g-cm Unipolar Stepper

ID: 3315_0

This affordable unipolar stepper has a 7.5° step angle and 50 g·cm of torque at low speeds.


This is a good compromise between the 3314 and the 3316.


This motor must be controlled by a constant current or chopper drive controller. You can find a list of suitable controllers on the Connection & Compatibility tab.

Motor Controllers

This motor must be controlled by a stepper motor controller. The following table shows how to connect the motor wires to the board connectors to produce a clockwise rotation in the stepper motor when increasing position.

To connect the motor to a bipolar motor controller, leave out the orange and brown wires.

Note: Make sure to unplug the power cord from the controller board before switching wires around.

Function 33151062STC1001
+ Orange + N.C.
A Red A A
B Yellow B
C Black C B
D White D
+ Brown + N.C.
Product Controller Properties Board Properties
Part Number Price Number of Motor Ports Motor Type Controlled By
PhidgetStepper Bipolar HC
$90.00 1 Bipolar Stepper USB (Mini-USB)
8A Stepper Phidget
$80.00 1 Bipolar Stepper VINT
4A Stepper Phidget
$40.00 1 Bipolar Stepper VINT

Product Specifications

Motor Properties
Motor Type Unipolar Stepper
Manufacturer Part Number PM25L-048-15
Step Angle 7 12°
Step Accuracy 7 %
Holding Torque 140 g·cm
Rated Torque 50 g·cm
Rated Speed 240 RPM
Electrical Properties
Rated Voltage 12 V DC
Rated Current 100 mA
Coil Resistance 120 Ω
Phase Inductance 31 mH
Physical Properties
Shaft Diameter 2 mm
Weight 31 g
Number of Leads 6
Wire Length 300 mm
Customs Information
Canadian HS Export Code 8501.10.00
American HTS Import Code 8501.10.40.40
Country of Origin CN (China)


Here's a list of our unipolar stepper motors:

Product Motor Properties Electrical Properties
Part Number Price Motor Type Step Angle Rated Torque Rated Speed Rated Voltage
50g-cm Unipolar Stepper
$2.50 Unipolar Stepper 18° 30 g·cm 575 RPM 12 V DC