B&R 81MPH4.101S124-01
2-phase hybrid stepper motor, 86 mm flange, length 122 mm, ABR 5 VDC, 10 A, 9.5 Nm holding torque
Lifecycle & replacement
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Technical specifications
Short description
| Stepper motor | Hybrid stepper motor flange size 86 mm |
Specific motor data
| Connection | M12, L-coded (male) |
| Wiring | Bipolar |
| Number of phases | 2 |
| Nominal voltage | 48 VDC |
| Nominal current | 10 A / phase |
| Continuous stall current | 10 A / phase |
| Peak current | 10 A / phase |
| Resistance/Phase | 0.30 Ω ±0.1 at 25°C |
| Inductance/Phase | 1.70 mH ±20% at 1 kHz |
| Voltage constant | 50.09 mV/rpm |
| Torque constant | 0.35 Nm/A |
| Nominal torque | 3.50 Nm |
| Peak torque | 9 Nm |
| Holding torque | 9 Nm |
| Detent torque | <320 mNm |
| Rotor inertia | 2500 gcm² |
General motor data
| Nominal speed | 500 rpm |
| Maximum speed | 3000 rpm |
| Stepping angle | 1.8° ±5% |
| Average period of operation between failures | - |
| Insulation class | B (130°C) |
| Dielectric resistance | 500 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 | -20 to 70°C |
| Temperature / Transport | -20 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 |
Electrical properties - Encoder
| Connection | M12, A-coded (male) |
| Linearity | <0.4° |
| Output signal | AB phase, R phase: 1 P/R revolution |
| Resolution | 4096 increments / 1024 positions per rotation |
| Current consumption | 50 mA |
| Supply voltage | +5 V ±5% |
| Accuracy | <0.4° |
Mechanical properties
| Material | Die-cast aluminum alloy |
| Max. radial load | 220 N |
| Max. axial load | 60 N |
| Weight | 3000 g |
| Length | 122 ±1 mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
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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.