VFD vs Servo Drive: Key Differences
A side-by-side comparison of VFD and servo drive motor type, feedback, dynamic response, overload rating, cost, and applications for industrial engineers.
- Part number
- BMH1901P21A2A
- Model no
- BMH
Schneider Electric BMH1901P21A2A Lexium 32 BMH 30 N·m 5000 rpm 190 mm Flange Untapped Shaft Servo Motor
Lexium 32 BMH servo motor, 30 N·m continuous, 190mm flange, 480V, untapped shaft, no brake.
Description
About the BMH
About the BMH
The Schneider Electric BMH1901P21A2A is a Lexium 32 series servo motor rated for 30 N·m continuous stall torque on a 190 mm flange, built for a 480 V three-phase supply. Paired with an LXM32D72N4, LXM32MD85N4, or LXM32MC10N4 drive, it delivers up to 5.18 kW nominal output power. It has a smooth untapped shaft, no holding brake, and a single-turn SinCos Hiperface encoder.
Certifications & Standards
- UL
Selection Notes
Across the LXM32D72N4, LXM32MD85N4, and LXM32MC10N4 pairings, the BMH1901P21A2A holds the same 30 N·m continuous torque — what changes is nominal speed headroom, from 2500 rpm on the 24 A drive to 3000 rpm on the 32 A and 40 A drives at the same torque. Pick the higher-current drive when the axis needs faster cycling at full torque rather than more torque. This is the A2A (no-brake) variant: on a vertical or gravity-loaded axis, the F2A holding-brake variant in the same 190 mm frame holds position when power is removed, which this motor cannot do on its own.
Specification
Full specification
Main 15
| Device short name | BMH |
|---|---|
| Product or Component Type | Servo motor |
| Maximum mechanical speed | 4000 rpm |
| Continuous stall torque | 265.5 lbf.in (30 N.m) LXM32.D72N4 24 A, 400 V, three phase, 265.5 lbf.in (30 N.m) LXM32.D72N4 24 A, 480 V, three phase, 265.5 lbf.in (30 N.m) LXM32MD85N4 32 A, 400 V, three phase, 265.5 lbf.in (30 N.m) LXM32MD85N4 32 A, 480 V, three phase, 265.5 lbf.in (30 N.m) LXM32MC10N4 40 A, 400 V, three phase, 265.5 lbf.in (30 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Peak stall torque | 687.7 lbf.in (77.7 N.m) LXM32.D72N4 24 A, 400 V, three phase, 687.7 lbf.in (77.7 N.m) LXM32.D72N4 24 A, 480 V, three phase, 766.5 lbf.in (86.6 N.m) LXM32MD85N4 32 A, 400 V, three phase, 766.5 lbf.in (86.6 N.m) LXM32MD85N4 32 A, 480 V, three phase, 793.9 lbf.in (89.7 N.m) LXM32MC10N4 40 A, 400 V, three phase, 793.9 lbf.in (89.7 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Nominal output power | 4800 W LXM32.D72N4 24 A, 400 V, three phase, 4800 W LXM32.D72N4 24 A, 480 V, three phase, 5180 W LXM32MD85N4 32 A, 400 V, three phase, 5180 W LXM32MD85N4 32 A, 480 V, three phase, 5180 W LXM32MC10N4 40 A, 400 V, three phase, 5180 W LXM32MC10N4 40 A, 480 V, three phase |
| Nominal torque | 162.9 lbf.in (18.4 N.m) LXM32.D72N4 24 A, 400 V, three phase, 162.9 lbf.in (18.4 N.m) LXM32.D72N4 24 A, 480 V, three phase, 146.04 lbf.in (16.5 N.m) LXM32MD85N4 32 A, 400 V, three phase, 146.04 lbf.in (16.5 N.m) LXM32MD85N4 32 A, 480 V, three phase, 146.04 lbf.in (16.5 N.m) LXM32MC10N4 40 A, 400 V, three phase, 146.04 lbf.in (16.5 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Nominal speed | 2500 rpm LXM32.D72N4 24 A, 400 V, three phase, 2500 rpm LXM32.D72N4 24 A, 480 V, three phase, 3000 rpm LXM32MD85N4 32 A, 400 V, three phase, 3000 rpm LXM32MD85N4 32 A, 480 V, three phase, 3000 rpm LXM32MC10N4 40 A, 400 V, three phase, 3000 rpm LXM32MC10N4 40 A, 480 V, three phase |
| Product compatibility | LXM32.D72N4 400...480 V three phase |
| Shaft end | Smooth shaft |
| IP Degree of Protection | IP65 standard, IP67 with IP67 kit |
| Speed feedback resolution | 131072 points/turn |
| Holding brake | Without |
| Mounting Support | International standard flange |
| Electrical Connection | Rotatable right-angled connectors |
Complementary 38
| Range Compatibility | Lexium 32 |
|---|---|
| [Us] rated supply voltage | 480 V |
| Phase | Three phase |
| Continuous stall current | 23.2 A |
| Continuous power | 5.24 W |
| Maximum current Irms | 89.61 A LXM32.D72N4 |
| Maximum permanent current | 89.6 A |
| Second shaft | Without second shaft end |
| Shaft diameter | 1.5 in (38 mm) |
| Shaft length | 3.1 in (80 mm) |
| Feedback type | Single turn SinCos Hiperface |
| Motor flange size | 7.5 in (190 mm) |
| Number of motor stacks | 1 |
| Torque constant | 1.3 N.m/A 248 °F (120 °C) |
| Back emf constant | 87.6 V/krpm 248 °F (120 °C) |
| Number of motor poles | 5.0 |
| Rotor inertia | 67.7 kg.cm² |
| Stator resistance | 0.24 Ohm 68 °F (20 °C) |
| Stator inductance | 2.54 mH 68 °F (20 °C) |
| Stator electrical time constant | 21.2 ms 68 °F (20 °C) |
| Maximum radial force Fr | 3730 N 1000 rpm |
| Maximum axial force Fa | 0.2 x Fr |
| Type of cooling | Natural convection |
| Length | 7.5 in (190 mm) |
| Centring collar diameter | 7.09 in (180 mm) |
| Centring collar depth | 0.2 in (4 mm) |
| Number of mounting holes | 4 |
| Mounting holes diameter | 0.6 in (14 mm) |
| Circle diameter of the mounting holes | 8.5 in (215 mm) |
| Net Weight | 41.9 lb(US) (19 kg) |
| Sizing reference | BMH1901P |
| Network number of phases | 3 |
| Accuracy error [angular] | 1.4 ° |
| Temperature copper hot | 275 °F (135 °C) |
| Temperature magnet hot | 212 °F (100 °C) |
| Temperature magnet rt | 68 °F (20 °C) |
| Output current 3s peak | 89.61 A |
| Inertia | 0.0 kg.cm² of brake, 67.72 kg.cm² of motor |
Contractual warranty 1
| Warranty (in months) | 18 |
|---|
Show all 67 specifications ↓ Show less ↑13 more values in Identification, Logistics.
Identification 8
| Part number | BMH1901P21A2A |
|---|---|
| Type designation | BMH |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 3606485264028 |
Logistics 5
| Country of origin | DE |
|---|---|
| Shipping weight | 19.0 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
Documents
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Quick answers
Questions about the BMH
What is the rated current of BMH?
The rated current of BMH is 23.2 A.
What motor power is BMH rated for?
The rated motor power of BMH is 4.8 kW.
What is the HS code of BMH for customs?
The tariff (HS) code on file for BMH is 850152.
What is the EAN of BMH?
The EAN (GTIN) of BMH is 3606485264028.
Where does BMH ship from, and how fast?
BMH ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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