Bj42d15 26v10 Stepper Motor Datasheet [QUICK]

The BJ42D15 26V10 is a "current-limited" motor. If you connect it directly to a 12V battery (without a chopper driver), Ohm's Law dictates: I = V / R = 12V / 2.6Ω = 4.6 Amps. The motor will reach 130°C in under 60 seconds and be destroyed.

The Driver Equation: Set your stepper driver's Vref current limit to 1.0A (Or 0.7A RMS if using a TMC silent driver).

For the standard 4-wire bipolar version of the BJ42D15-26V10, the wiring is straightforward. bj42d15 26v10 stepper motor datasheet

Typical Wire Color Configuration:

Note: Always verify phase pairs using a multimeter to check continuity. Wires within the same phase will have low resistance (approx. 1.5Ω - 1.75Ω) between them, while wires from different phases will have infinite resistance (open circuit). The BJ42D15 26V10 is a "current-limited" motor

The BJ42D15 adheres strictly to the NEMA 17 mounting standard. While the faceplate is square, the electrical characteristics (26V/1.0A) make it unique.

Note on D15 Length: The "D15" designation creates a body length of approximately 40mm. Excluding the rear protrusion, the total motor depth is roughly 48mm. This is shorter than a standard "D20" or "D25" stack, making the BJ42D15 ideal for space-constrained designs where torque requirements are moderate. The Driver Equation: Set your stepper driver's Vref

A: Yes. Using Ohm's Law: 12V / 26 Ohms = 0.46A. The motor will run cool and very quietly, but the holding torque will drop to approximately 0.14 N·m (half of rated). It is safe for light loads.

Use power resistors in series with a higher voltage supply. For 26V operation, drive directly. For 12V operation, you need no resistors (since 26 Ohms limits current to 0.46A on 12V – safe but low torque).