FA-1718RB (3+5P) Coreless Brushless DC Motor

The FA-1718RB (3+5P) is a compact 4W coreless brushless DC motor with 17mm outer diameter and 18mm body length. It adopts oil-impregnated sleeve bearings and exclusive split mixed 3+5Pin terminal design: 3 separate 2.0mm pin headers for motor windings, plus 5Pin MOLEX 1.25mm connector for hall signal lines, effectively isolating power and signal circuits to reduce interference. This model provides two 7.4V lithium battery and two 12V industrial winding variants with distinct speed-torque curves. Optional planetary gearbox and encoder support high-precision miniature closed-loop drive control.

• Dimension: Φ17mm × Length 18mm
• Rated Power: 4W
• Voltage Options: 7.4V(01A/14A) / 12V(43A/62A)
• Oil-impregnated sleeve bearings + built-in 3-channel hall sensor
• Split 3+5 mixed pin terminal; Optional gearbox & encoder

FA-1718RB (3+5P) 17×18mm coreless brushless DC motor with split 3+5 mixed pin terminals for portable precision devices

Mechanical Dimensions

FA-1718RB (3+5P) Φ17×18mm coreless brushless DC motor dimension diagram

Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.

Performance Parameters

Motor specifications 01A 14A 43A 62A
Nominal voltage  V 7.4 7.4 12 12
No load speed rpm 27000 35000 27000 29000
No load current mA 150 240 130 130
Nominal speed rpm 23000 30000 23300 25200
Nominal torque mNm 2.21 2.99 2.6 2.26
Nominal current A 0.97 1.69 0.73 0.68
Stall torque mNm 17 23 19.3 17.4
Stall current A 6.49 11.38 4.55 4.4
Terminal resistance Ω 1.14 0.65 2.64 2.73
Torque constant mNm/A 2.56 1.97 3.31 3.87
Speed constant rpm/V 3648 4729 2250 2416
Mechanical time constant ms 3.77 3.61 5.13 3.96
Rotor inertia gcm² 0.24 0.24 0.24 0.24

Optical Gearbox

N/A

Optional encoder

N/A

Terminal data

Terminal data
Teminal model : Pin 1 ~ Pin 3

单排针间距2.0mm 3Pin

 Pin 4 ~ Pin 8

MOLEX51021-0500端子间距1.25mm 5Pin
Pin 1 电机绕组 Motor winding 2 Pin 2 电机绕组 Motor winding 3 Pin 3 电机绕组 Motor winding 1 Pin 4 霍尔传感器 Hall Vcc 3.3~5V
Pin 5 霍尔传感器 Hall GND Pin 6 霍尔传感器 Hall sensor 3 Pin 7 霍尔传感器 Hall sensor 1 Pin 8 霍尔传感器 Hall sensor 2

Other Specifications

Other specifications
Operating temperature range -20…+80℃ Bearing type Sleeve bearings
Number of pole pairs 1 Weight of motor 21.5g
Number of phases 3

Engineering Overview

FA-1718RB (3+5P) coreless brushless DC motor eliminates mechanical brush contact friction, greatly extending service life and lowering electromagnetic interference. Its unique split mixed 3+5Pin dual-terminal structure separates power windings and hall signal lines, effectively avoiding power circuit crosstalk and improving control signal stability. Consistent low rotor inertia delivers smooth cogging-free rotation and fast dynamic response. Dual 7.4V lithium battery and dual 12V industrial winding options adapt to various portable battery and small industrial power supply systems. Matched gearbox and encoder enable precise torque amplification and closed-loop speed positioning for miniature handheld and compact automation equipment.

Typical Applications:
• Handheld beauty & portable medical instruments
• Mini wearable intelligent electronic modules
• Micro robot miniature drive actuators
• Compact battery-powered precision testing equipment

Need customized split 3+5 mixed pin terminals or multi-speed windings?

FA-1718RB (3+5P) adopts independent power & signal split connector design, with 7.4V and 12V performance versions available. We can optimize coil parameters and match gearbox & encoder according to your installation and load requirements.