OverviewThe C12B series is a family of φ12 mm brushless DC micromotors by C.I. TAKIRON Corporation. The series includes multiple sub-models optimized for different voltages, speeds, torques and outputs. Available customization items include lead pins, grounding terminals and, for some models, gear heads.
Models (summary table)- C12B-08 | Outer Diameter 12 mm | Length 13.5 mm | Applied Voltage 12 V | Terminal resistance 25.9 Ω | No-load rotation speed 23200 r/m | No-load current 85 mA | Startup current 463 mA | Startup torque 1.53 mN·m | Max efficiency 32.7% | Max output 0.93 W
- C12B-07 | Outer Diameter 12 mm | Length 13.5 mm | Applied Voltage 12 V | Terminal resistance 22.0 Ω | No-load rotation speed 26100 r/m | No-load current 90 mA | Startup current 545 mA | Startup torque 1.67 mN·m | Max efficiency 35.3% | Max output 1.14 W
- C12B-06 | Outer Diameter 12 mm | Length 13.5 mm | Applied Voltage 12 V | Terminal resistance 14.5 Ω | No-load rotation speed 29900 r/m | No-load current 170 mA | Startup current 828 mA | Startup torque 2.00 mN·m | Max efficiency 29.9% | Max output 1.57 W
- C12B-02 | Outer Diameter 12 mm | Length 13.5 mm | Applied Voltage 7.4 V | Terminal resistance 4.8 Ω | No-load rotation speed 26200 r/m | No-load current 130 mA | Startup current 1555 mA | Startup torque 3.52 mN·m | Max efficiency 50.5% | Max output 2.42 W
- C12B-01 | Outer Diameter 12 mm | Length 13.5 mm | Applied Voltage 4.5 V | Terminal resistance 3.7 Ω | No-load rotation speed 23000 r/m | No-load current 130 mA | Startup current 1233 mA | Startup torque 1.84 mN·m | Max efficiency 45.6% | Max output 1.11 W
- C12B-11 | Outer Diameter 12 mm | Length 17.5 mm | Applied Voltage 12 V | Terminal resistance 24.7 Ω | No-load rotation speed 14700 r/m | No-load current 77 mA | Startup current 486 mA | Startup torque 2.68 mN·m | Max efficiency 36.2% | Max output 1.03 W
- C12B-10 | Outer Diameter 12 mm | Length 17.5 mm | Applied Voltage 12 V | Terminal resistance 11.2 Ω | No-load rotation speed 20400 r/m | No-load current 97 mA | Startup current 1071 mA | Startup torque 4.98 mN·m | Max efficiency 48.9% | Max output 2.66 W
- C12B-09 | Outer Diameter 12 mm | Length 17.5 mm | Applied Voltage 12 V | Terminal resistance 5.6 Ω | No-load rotation speed 30000 r/m | No-load current 140 mA | Startup current 2139 mA | Startup torque 7.14 mN·m | Max efficiency 55.4% | Max output 5.61 W
- C12B-04 | Outer Diameter 12 mm | Length 17.5 mm | Applied Voltage 12 V | Terminal resistance 5.6 Ω | No-load rotation speed 30500 r/m | No-load current 125 mA | Startup current 2143 mA | Startup torque 7.14 mN·m | Max efficiency 57.5% | Max output 5.70 W
- C12B-03 | Outer Diameter 12 mm | Length 17.5 mm | Applied Voltage 12 V | Terminal resistance 2.8 Ω | No-load rotation speed 28000 r/m | No-load current 190 mA | Startup current 2857 mA | Startup torque 6.79 mN·m | Max efficiency 55.1% | Max output 4.98 W
Customizable items- Lead pin (available on multiple C12B models)
- Grounding terminal (available on multiple C12B models)
- Gear head (available on selected C12B models such as C12B-11, C12B-10, C12B-09, C12B-04, C12B-03)
Notes- Values shown per model are manufacturer test/spec values (rotation speed, currents, torque, efficiency, output, etc.).
- Applied voltage varies by sub-model (examples: 4.5 V, 7.4 V, 12 V shown among sub-models).
Technical specifications- Series: C12B series (outer diameter φ12 mm)
- Motor type: Brushless DC micromotors
- Typical applied voltages by sub-model: 4.5 V, 7.4 V, 12 V
- No-load speeds: from ~14700 r/m up to ~30500 r/m depending on model
- No-load currents: typical values range from ~77 mA to ~190 mA (model-dependent)
- Startup currents: up to several thousand mA for high-torque sub-models (e.g. >2000 mA for C12B-09 / C12B-04)
- Startup torque: from ~1.53 mN·m up to ~7.14 mN·m across the series
- Maximum efficiency: up to ~57.5% for some sub-models
- Maximum output: up to ~5.70 W for high-power sub-models
- Customizable options: lead pin, grounding terminal, selectable gear head for specific models
- Typical form factor: outer diameter 12 mm with varying body length (examples: 13.5 mm, 17.5 mm)