FA-2835RB Coreless Brushless DC Motor
FA-2835RB is a large-diameter 20W coreless brushless DC motor with 28mm outer diameter and 35mm body length. It adopts durable ball bearings and integrates 3-channel hall sensor + NTC temperature sensor for real-time temperature monitoring and stable closed-loop control. Unique dual separate wiring harness design: XHP-3 power terminal for 3-phase windings, Molex SD-51021 signal terminal for hall & temperature signals. Four voltage variants cover 8.4V lithium, 12V and 24V industrial power. Optional planetary gearbox and multi-spec encoders for medical, beauty and miniature automation equipment.
• Dimension: Φ28mm × Length 35mm
• Rated Power: 20W
• Voltage Options: 8.4V(24A) / 12V(03A/14A) / 24V(01A)
• Ball bearings + Built-in hall & NTC temperature sensor
• Dual separate harness: XHP-3 2.5mm power + Molex PH1.25 signal wires
Mechanical Dimensions
Dimensions are in mm. Please refer to the datasheet for tolerances and mounting details.
Performance Parameters
| Motor specifications | 24A | 03A | 14A | 01A | |
|---|---|---|---|---|---|
| Nominal voltage | V | 8.4 | 12 | 12 | 24 |
| No load speed | rpm | 15000 | 9500 | 12500 | 13500 |
| No load current | mA | 210 | 70 | 110 | 60 |
| Nominal speed | rpm | 13500 | 8500 | 11000 | 12200 |
| Nominal torque | mNm | 14.23 | 10.04 | 11.74 | 13.82 |
| Nominal current | A | 2.85 | 0.9 | 1.38 | 0.87 |
| Stall torque | mNm | 149.7 | 105.7 | 123.6 | 145.5 |
| Stall current | A | 28 | 8.76 | 13.48 | 8.57 |
| Terminal resistance | Ω | 0.3 | 1.37 | 0.89 | 2.8 |
| Torque constant | mNm/A | 5.24 | 11.82 | 8.98 | 16.63 |
| Speed constant | rpm/V | 1785 | 791 | 1041 | 562 |
| Mechanical time constant | ms | 4.69 | 4.21 | 4.73 | 4.34 |
| Rotor inertia | gcm² | 4.68 | 4.68 | 4.68 | 4.68 |
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 | 94.3g |
| Number of phases | 3 |
Engineering Overview
FA-2835RB coreless BLDC eliminates cogging torque and brush abrasion for ultra-smooth low-noise rotation. Built-in NTC sensor realizes real-time overheat protection, improving safety for long continuous operation. Dual independent power/signal harness avoids signal interference. Multiple voltage options fit lithium handheld devices and industrial equipment. Matched gearbox and encoders support precise closed-loop positioning.
Typical Applications:
• High-end handheld beauty & tattoo equipment
• Portable precision medical instruments
• Mini robot medium-load joint actuators
• Laboratory testing miniature drive modules