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The TDC2030 series from TT MOTOR is a 20mm-diameter brushed DC motor featuring a coreless (hollow-cup) rotor design. Unlike traditional iron‑core motors, coreless technology eliminates cogging torque and reduces rotor inertia, enabling rapid acceleration and smooth low‑speed operation. Available in 6V and 12V variants, this motor is ideal for battery‑powered portable devices, medical tools, and precision actuators.

1. Two Voltage Options – 6V and 12V

Both models share the same 20mm diameter and 30mm body length (nominal), weighing only 48g. The higher voltage version achieves nearly double the speed and almost double the rated torque, while drawing less current at rated load.

2. High Speed‑to‑Torque Ratio – Coreless Advantage

The TDC2030‑1211 spins at 11,400 rpm no‑load – very high for a 20mm brushed motor. Even under rated load (40 g·cm), it maintains 10,500 rpm, a drop of only 8%. This stiff speed‑torque characteristic is a direct benefit of the coreless winding: no iron saturation, low electrical time constant, and minimal armature reaction.

Application implication: For devices like dental drills, cosmetic brushes, or miniature pumps, the motor can maintain consistent speed even when load fluctuates.

3. Current Consumption – Efficiency and Battery Life

At rated load, the 6V model draws 240 mA; the 12V model draws 490 mA. Input electrical power:

6V version: 6V × 0.24A = 1.44W input, output 1.1W → efficiency ≈ 76%.

12V version: 12V × 0.49A = 5.88W input, output 4.35W → efficiency ≈ 74%.

Both are excellent for brushed motors, especially given the coreless design minimizes eddy current losses. For battery‑operated devices (e.g., handheld massagers, electric toothbrushes), this means less heat and longer run time.

4. Stall Torque and Starting Current

6V model: Stall torque 260 g·cm, stall current 2.85A. That’s nearly 12× rated torque, but also 12× rated current.

12V model: Stall torque 105 g·cm, stall current 5.65A. Interestingly, the lower‑voltage motor has higher stall torque – this is due to different winding resistance (more turns, higher resistance, but higher torque constant).

Practical meaning: The 6V version can break away a much heavier stuck load, but at the cost of very high inrush current. The 12V version is better for applications requiring less starting torque but faster speed.

5. Physical Construction and Integration

The motor weighs only 48g and has a compact 20mm diameter. Key features typical of TT MOTOR‘s TDC series:

Metal brushes for low electrical noise and longer life (1000+ hours).

Self‑supporting copper winding – no iron core, so no cogging.

Sleeve bearings or optional ball bearings.

The motor can be customized with different shaft lengths, connectors, or a gearbox (e.g., planetary or spur).