FA-2850RB Coreless Brushless DC Motor
FA-2850RB is a heavy-duty 30W coreless brushless DC motor with 28mm outer diameter and 50mm ultra-long body. It adopts double ball bearings, integrated 3-channel hall sensor and built-in NTC thermal sensor for real-time temperature monitoring and stable closed-loop control. It features split wiring design: independent XHP-3 power terminal and Molex PH1.25 signal terminal to avoid signal interference. Four winding versions cover 24V, 28V and 30V industrial voltages, with ultra-high stall torque for heavy loads. Custom planetary gearbox and multi-resolution encoders are available.
• Dimension: Φ28mm × Length 50mm
• Rated Power: 30W
• Voltage Options: 24V(04A) / 28V(06A) / 30V(05A/03A)
• Double ball bearings + Hall + NTC overheat sensor
• Split power & signal dual connectors; Optional gearbox & encoder
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 04A | 06A | 05A | 03A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 24 | 28 | 30 | 30 |
| No load speed | rpm | 10000 | 10000 | 8000 | 18000 |
| No load current | mA | 100 | 80 | 70 | 130 |
| Nominal speed | rpm | 9000 | 9000 | 7200 | 16200 |
| Nominal torque | mNm | 29.36 | 29.39 | 25.64 | 29.46 |
| Nominal current | A | 1.37 | 1.17 | 0.78 | 1.97 |
| Stall torque | mNm | 309 | 309.4 | 269.9 | 310.1 |
| Stall current | A | 13.48 | 11.57 | 7.54 | 19.48 |
| Terminal resistance | Ω | 1.78 | 2.42 | 3.98 | 1.54 |
| Torque constant | mNm/A | 22.56 | 26.2 | 35.09 | 15.59 |
| Speed constant | rpm/V | 416 | 357 | 266 | 600 |
| Mechanical time constant | ms | 2.53 | 2.52 | 2.32 | 4.53 |
| Rotor inertia | gcm² | 7.81 | 7.81 | 7.81 | 7.81 |
Optical Gearbox
| N/A | |
|---|---|
Optional encoder
| N/A | |
|---|---|
Terminal data
| Terminal data | ||
|---|---|---|
| Teminal model :Pin 1 ~ Pin 3 XHP-3 XH2.5 AWG24铁氟龙线 | Pin 4 ~ Pin 5 | MOLEX SD-51021-006 PH1.25 AWG26 PE排线 |
| Pin 1 电机绕组Motor winding 3 黑色Black | Pin 2 电机绕组Motor winding 1 黄色Yellow | Pin 3 电机绕组Motor winding 2 红色Red |
| Pin 4 温控传感器NTC 黑色Black | Pin 5 霍尔传感器Hall GND 黑色Black | Pin 6 霍尔传感器Hall Vcc 3.3~5V 黑色Black |
| Pin 7 霍尔传感器Hall sensor 1 黑色Black | Pin 8 霍尔传感器Hall sensor 2 黑色Black | Pin 9 霍尔传感器Hall sensor 3 黑色Black |
Other Specifications
| Other specifications | |||
|---|---|---|---|
| Operating temperature range | -20…+80℃ | Bearing type | Ball bearings |
| Number of pole pairs | 1 | Weight of motor | 155g |
| Number of phases | 3 |
Engineering Overview
FA-2850RB coreless BLDC eliminates cogging torque and brush wear for ultra-smooth low-vibration rotation. Split power/signal harness avoids electromagnetic interference. Built-in NTC sensor realizes real-time overheat protection for long-hour heavy-duty work. Large rotor inertia delivers ultra-high stall torque for high-load scenarios. Multi industrial voltage options support handheld power tools and precision automation; matched gearbox & encoders enable precise closed-loop torque & position control.
Typical Applications:
• High-power engraving & polishing handheld power tools
• Heavy-load medical & beauty professional equipment
• Medium-heavy miniature robot joint actuators
• Industrial precision testing drive modules