DC motor A16B-04

4.5 Vcoreless

Product overview
Series A16B coreless motors (outer diameter Ø16 mm, length 19.2 mm). The A16B family comprises multiple sub-models optimized for several applied voltages and performance points. Sub-model A16B-33 is commonly used in electronic keys (security doors). Mechanical outline drawings and CAD data are available for download from the product resources on the site.

Product Series (selected A16B models)

• A16B-33 | Ø16 mm | L 19.2 mm | 12.0 V | Terminal R 11.80 Ω | No-load speed 14,200 r/min | No-load current 22 mA | Startup current 1,017 mA | Startup torque 7.86 mN·m | Max efficiency 72.7% | Max output 2.92 W
• A16B-31 | Ø16 mm | L 19.2 mm | 5.0 V | Terminal R 6.25 Ω | No-load speed 9,000 r/min | No-load current 25 mA | Startup current 800 mA | Startup torque 3.98 mN·m | Max efficiency 67.8% | Max output 0.94 W
• A16B-29 | Ø16 mm | L 19.2 mm | 4.5 V | Terminal R 2.20 Ω | No-load speed 18,600 r/min | No-load current 35 mA | Startup current 2,045 mA | Startup torque 4.57 mN·m | Max efficiency 75.5% | Max output 2.22 W
• A16B-27 | Ø16 mm | L 19.2 mm | 4.5 V | Terminal R 1.54 Ω | No-load speed 17,930 r/min | No-load current 28 mA | Startup current 2,922 mA | Startup torque 6.87 mN·m | Max efficiency 81.4% | Max output 3.23 W
• A16B-25 | Ø16 mm | L 19.2 mm | 5.0 V | Terminal R 21.7 Ω | No-load speed 4,900 r/min | No-load current 9 mA | Startup current 230 mA | Startup torque 2.07 mN·m | Max efficiency 64.4% | Max output 0.27 W
• A16B-22 | Ø16 mm | L 19.2 mm | 12.0 V | Terminal R 32.5 Ω | No-load speed 11,000 r/min | No-load current 6 mA | Startup current 369 mA | Startup torque 3.72 mN·m | Max efficiency 76.1% | Max output 1.07 W
• A16B-10 | Ø16 mm | L 19.2 mm | 12.0 V | Terminal R 17.0 Ω | No-load speed 18,000 r/min | No-load current 12 mA | Startup current 706 mA | Startup torque 4.34 mN·m | Max efficiency 75.6% | Max output 2.05 W
• A16B-09 | Ø16 mm | L 19.2 mm | 12.0 V | Terminal R 80.0 Ω | No-load speed 8,100 r/min | No-load current 4 mA | Startup current 150 mA | Startup torque 2.01 mN·m | Max efficiency 70.0% | Max output 0.43 W
• A16B-07 | Ø16 mm | L 19.2 mm | 4.5 V | Terminal R 4.7 Ω | No-load speed 10,600 r/min | No-load current 15 mA | Startup current 957 mA | Startup torque 3.76 mN·m | Max efficiency 76.5% | Max output 1.04 W
• A16B-04 | Ø16 mm | L 19.2 mm | 4.5 V | Terminal R 3.5 Ω | No-load speed 13,500 r/min | No-load current 16 mA | Startup current 1,286 mA | Startup torque 3.99 mN·m | Max efficiency 78.9% | Max output 1.41 W
• A16B-03 | Ø16 mm | L 19.2 mm | 4.5 V | Terminal R 7.0 Ω | No-load speed 12,300 r/min | No-load current 17 mA | Startup current 643 mA | Startup torque 2.13 mN·m | Max efficiency 70.1% | Max output 0.69 W

A16B-33 Product Details
Product Specifications

• Model: A16B-33
• Outer diameter: 16 mm
• Length: 19.2 mm
• Applied voltage: 12.0 V
• Terminal resistance: –
• No-load speed: 14,200 r/min
• No-load current: 22 mA
• Startup current: 1,017 mA
• Startup torque: 7.86 mN·m
• Max efficiency: 72.7%
• Max output: 2.92 W

Customizable Items

• Gear head
• Lead pin
• Lead wire
• Grounding terminal

Notes

• Series outer diameter: Ø16 mm.
• Multiple sub-models are offered to match required applied voltage, torque and speed characteristics.
• Mechanical outline drawings and CAD data are available for download from product resources.

Technical specifications

• Series: A16B (coreless motors), nominal outer diameter 16 mm.
• Main available applied voltages across variants: 4.5 V, 5.0 V, 12.0 V (model-dependent).
• Terminal resistance range (examples): ~1.54 Ω up to ~80.0 Ω depending on model.
• No-load speeds range (examples): 4,900 r/min up to 18,600 r/min across models.
• Startup currents can exceed 2,000 mA for some high-torque variants (model-dependent).
• Startup torque examples: approximately 2.07 mN·m up to 7.86 mN·m across models.
• Maximum efficiencies observed in table: up to approximately 81.4% (model-dependent).
• Customizable options include gear head, lead pin, lead wire and grounding terminal.