B&R 81MPF1.250S100-01
2-phase hybrid stepper motor, 60 mm flange, length 75.7 mm, 2.5 A, 1 Nm holding torque
Lifecycle & replacement
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Technical specifications
Short description
| Stepper motor | Hybrid stepper motor flange size 60 mm |
General information
| Certifications / CE | Yes |
Specific motor data
| Connection | M12, L-coded (male) |
| Wiring | Bipolar |
| Number of phases | 2 |
| Nominal voltage | 48 VDC |
| Nominal current | 2.5 A / phase |
| Continuous stall current | 2.5 A / phase |
| Peak current | 3 A / phase |
| Resistance/Phase | 1.1 Ω ±20% at 25°C |
| Inductance/Phase | 3.3 mH at 1 kHz, 1 Vrms |
| Voltage constant | 27.2 V/min⁻¹ |
| Torque constant | 0.376 Nm/A |
| Nominal torque | 0.94 Nm |
| Peak torque | 1.36 Nm |
| Holding torque | Min. 1.04 Nm |
| Detent torque | 35 mNm |
| Rotor inertia | 280 gcm² |
General motor data
| Nominal speed | 500 rpm |
| Stepping angle | 1.8° |
| Average period of operation between failures | Min. 20000 hours |
| Insulation class | B (130°C) |
| Insulation resistance | Min. 100 MΩ |
| Dielectric resistance | 1000 VAC for 1 minute |
| Driver supply voltage | Max. 60 V |
Operating conditions
| Degree of protection per EN 60529 | IP65 |
Ambient conditions
| Temperature / Operation | -20 to 50°C |
| Temperature / Storage | -30 to 70°C |
| Temperature / Transport | -30 to 70°C |
| Relative humidity / Operation | 15 to 95%, non-condensing |
| Relative humidity / Storage | 5 to 95%, non-condensing |
| Relative humidity / Transport | 5 to 95%, non-condensing |
Mechanical properties
| Material | Die-cast aluminum alloy |
| Max. radial load | 75 N |
| Max. axial load | The permissible axial load is not permitted to be greater than the motor mass. |
| Weight | 745 g |
| Length | 75.7 mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
3D CAD models
Get a quote for a replacement
Industrial Automation Co. stocks, sources, and repairs B&R parts — new, refurbished, or exchange units with warranty.
Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.