The BO3850NH3B is a 38mm brushless DC outer rotor motor designed for sensorless operation. Ideal for UAVs, robotics, automation equipment, and power tools, it offers high efficiency, compact size, and versatile customization options including shaft length, gearheads, and encoder feedback, making it suitable for demanding precision motion applications.
| Parameter | Unit | BO3850NH3B01-88-24.0 | BO3850NH3B01-88-36.0 | BO3850NH3B01-88-48.0 |
|---|---|---|---|---|
| Voltage | V | 24.0 | 36.0 | 48.0 |
| Terminal resistance | Ω | 0.1 | 0.23 | 0.39 |
| No-load speed | rpm | 8800 | 8800 | 8800 |
| No-load current | A | 1 | 0.7 | 0.5 |
| Stall torque | mNm | 6198 | 6060 | 6358 |
| Stall current | A | 240 | 156.5 | 123.1 |
| Nominal torque | mNm | 346 | 345 | 347 |
| Nominal speed | rpm | 7650 | 7480 | 7850 |
| Nominal current | A | 13.1 | 8.5 | 6.7 |
| Max. output power | W | 1427 | 1395 | 1464 |
| Max. efficiency | % | 87.5 | 87.0 | 87.6 |
| Back-EMF constant | mV/rpm | 2.7 | 4.1 | 5.4 |
| Torque constant | mNm/A | 25.9 | 38.9 | 51.9 |
| KV Value | rpm/V | 367 | 244 | 183 |
| Speed/torque gradient | rpm/mNm | 1.42 | 1.45 | 1.38 |
| Rotor inertia | gcm² | 228 | 228 | 228 |
| Weight | g | 198 | 198 | 198 |
| Thermal resistance housing-ambient | K/W | 1.1 | 1.1 | 1.1 |
| Thermal resistance winding-housing | K/W | 1.2 | 1.2 | 1.2 |
| Thermal time constant motor | s | 350 | 350 | 350 |
| Thermal time constant winding | s | 63 | 63 | 63 |
| Operating temperature range | °C | -40~+100 | -40~+100 | -40~+100 |
| Thermal class of winding | °C | 180 | 180 | 180 |
| Axial play | mm | 0.012 | 0.012 | 0.012 |
| Radial play | mm | 0.008 | 0.008 | 0.008 |
| Axial load dynamic | N | 8 | 8 | 8 |
| Axial load static | N | 110 | 110 | 110 |
| Radial load at 3 mm from mounting face | N | 31 | 31 | 31 |
| No. of pole pairs | 7 | 7 | 7 | |
| Bearings | 3 ball bearings | 3 ball bearings | 3 ball bearings | |
| Protection class | IP | 20 | 20 | 20 |
| Commutation | Hall sensor | Hall sensor | Hall sensor |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO3850NH3B01-88-24.0 |
|---|---|---|
| Voltage | V | 24.0 |
| Terminal resistance | Ω | 0.1 |
| No-load speed | rpm | 8800 |
| No-load current | A | 1 |
| Stall torque | mNm | 6198 |
| Stall current | A | 240 |
| Nominal torque | mNm | 346 |
| Nominal speed | rpm | 7650 |
| Nominal current | A | 13.1 |
| Max. output power | W | 1427 |
| Max. efficiency | % | 87.5 |
| Back-EMF constant | mV/rpm | 2.7 |
| Torque constant | mNm/A | 25.9 |
| KV Value | rpm/V | 367 |
| Speed/torque gradient | rpm/mNm | 1.42 |
| Rotor inertia | gcm² | 228 |
| Weight | g | 198 |
| Thermal resistance housing-ambient | K/W | 1.1 |
| Thermal resistance winding-housing | K/W | 1.2 |
| Thermal time constant motor | s | 350 |
| Thermal time constant winding | s | 63 |
| Operating temperature range | °C | -40~+100 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.012 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 8 |
| Axial load static | N | 110 |
| Radial load at 3 mm from mounting face | N | 31 |
| No. of pole pairs | 7 | |
| Bearings | 3 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Hall sensor |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO3850NH3B01-88-36.0 |
|---|---|---|
| Voltage | V | 36.0 |
| Terminal resistance | Ω | 0.23 |
| No-load speed | rpm | 8800 |
| No-load current | A | 0.7 |
| Stall torque | mNm | 6060 |
| Stall current | A | 156.5 |
| Nominal torque | mNm | 345 |
| Nominal speed | rpm | 7480 |
| Nominal current | A | 8.5 |
| Max. output power | W | 1395 |
| Max. efficiency | % | 87.0 |
| Back-EMF constant | mV/rpm | 4.1 |
| Torque constant | mNm/A | 38.9 |
| KV Value | rpm/V | 244 |
| Speed/torque gradient | rpm/mNm | 1.45 |
| Rotor inertia | gcm² | 228 |
| Weight | g | 198 |
| Thermal resistance housing-ambient | K/W | 1.1 |
| Thermal resistance winding-housing | K/W | 1.2 |
| Thermal time constant motor | s | 350 |
| Thermal time constant winding | s | 63 |
| Operating temperature range | °C | -40~+100 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.012 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 8 |
| Axial load static | N | 110 |
| Radial load at 3 mm from mounting face | N | 31 |
| No. of pole pairs | 7 | |
| Bearings | 3 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Hall sensor |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO3850NH3B01-88-48.0 |
|---|---|---|
| Voltage | V | 48.0 |
| Terminal resistance | Ω | 0.39 |
| No-load speed | rpm | 8800 |
| No-load current | A | 0.5 |
| Stall torque | mNm | 6358 |
| Stall current | A | 123.1 |
| Nominal torque | mNm | 347 |
| Nominal speed | rpm | 7850 |
| Nominal current | A | 6.7 |
| Max. output power | W | 1464 |
| Max. efficiency | % | 87.6 |
| Back-EMF constant | mV/rpm | 5.4 |
| Torque constant | mNm/A | 51.9 |
| KV Value | rpm/V | 183 |
| Speed/torque gradient | rpm/mNm | 1.38 |
| Rotor inertia | gcm² | 228 |
| Weight | g | 198 |
| Thermal resistance housing-ambient | K/W | 1.1 |
| Thermal resistance winding-housing | K/W | 1.2 |
| Thermal time constant motor | s | 350 |
| Thermal time constant winding | s | 63 |
| Operating temperature range | °C | -40~+100 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.012 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 8 |
| Axial load static | N | 110 |
| Radial load at 3 mm from mounting face | N | 31 |
| No. of pole pairs | 7 | |
| Bearings | 3 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Hall sensor |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
