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
- BMH1903P21A2A
- Model no
- BMH
Schneider Electric BMH1903P21A2A Lexium 32 BMH 65 N·m 3500 rpm 190 mm Flange Untapped Shaft Servo Motor
Schneider Electric BMH1903P21A2A Lexium 32 BMH up to 65 N·m servo motor, 190 mm flange.
Description
About the BMH
About the BMH
The BMH1903P21A2A is a Schneider Electric Lexium 32 BMH medium-inertia servo motor rated up to 65 N·m continuous stall torque at 3500 rpm maximum mechanical speed on the 40 A LXM32MC10N4 drive, built without a brake and with an untapped (smooth) shaft on a 190 mm international standard flange. It is IP65-rated as standard (IP67 with the optional kit) and uses a single-turn SinCos Hiperface encoder (131072 points/turn).
Selection Notes
Unlike most BMH frames, the BMH1903P21A2A's continuous stall torque scales with the paired drive: 43.2 N·m on the 24 A LXM32.D72N4, 57.6 N·m on the 32 A LXM32MD85N4, or 65 N·m on the 40 A LXM32MC10N4 — so the drive selected sets the usable torque, not just the current headroom. At 194.1 kg·cm² rotor inertia and 43 kg, this is the largest motor in the BMH line covered here; it has no holding brake, so vertical or overhauling axes need the brake-equipped BMH1901P21F2A on the same 190 mm frame instead. The 131072-point/turn encoder matches the precision class of the other 190 mm BMH variants.
Applications
At up to 7.75 kW nominal output power and 65 N·m continuous torque, this motor targets heavy horizontal axes — large gantries, extruder and winder drives, and high-inertia indexing loads — where the driven mechanism itself prevents back-driving and a brake is not required.
Specification
Full specification
Main 15
| Device short name | BMH |
|---|---|
| Product or Component Type | Servo motor |
| Maximum mechanical speed | 3500 rpm |
| Continuous stall torque | 382.4 lbf.in (43.2 N.m) LXM32.D72N4 24 A, 400 V, three phase, 382.4 lbf.in (43.2 N.m) LXM32.D72N4 24 A, 480 V, three phase, 509.8 lbf.in (57.6 N.m) LXM32MD85N4 32 A, 400 V, three phase, 509.8 lbf.in (57.6 N.m) LXM32MD85N4 32 A, 480 V, three phase, 575.3 lbf.in (65 N.m) LXM32MC10N4 40 A, 400 V, three phase, 575.3 lbf.in (65 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Peak stall torque | 1086.9 lbf.in (122.8 N.m) LXM32.D72N4 24 A, 400 V, three phase, 1086.9 lbf.in (122.8 N.m) LXM32.D72N4 24 A, 480 V, three phase, 1250.6 lbf.in (141.3 N.m) LXM32MD85N4 32 A, 400 V, three phase, 1250.6 lbf.in (141.3 N.m) LXM32MD85N4 32 A, 480 V, three phase, 1440.01 lbf.in (162.7 N.m) LXM32MC10N4 40 A, 400 V, three phase, 1440.01 lbf.in (162.7 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Nominal output power | 5700 W LXM32.D72N4 24 A, 400 V, three phase, 5700 W LXM32.D72N4 24 A, 480 V, three phase, 7330 W LXM32MD85N4 32 A, 400 V, three phase, 7330 W LXM32MD85N4 32 A, 480 V, three phase, 7750 W LXM32MC10N4 40 A, 400 V, three phase, 7750 W LXM32MC10N4 40 A, 480 V, three phase |
| Nominal torque | 318.6 lbf.in (36 N.m) LXM32.D72N4 24 A, 400 V, three phase, 318.6 lbf.in (36 N.m) LXM32.D72N4 24 A, 480 V, three phase, 309.8 lbf.in (35 N.m) LXM32MD85N4 32 A, 400 V, three phase, 309.8 lbf.in (35 N.m) LXM32MD85N4 32 A, 480 V, three phase, 327.5 lbf.in (37 N.m) LXM32MC10N4 40 A, 400 V, three phase, 327.5 lbf.in (37 N.m) LXM32MC10N4 40 A, 480 V, three phase |
| Nominal speed | 1500 rpm LXM32.D72N4 24 A, 400 V, three phase, 1500 rpm LXM32.D72N4 24 A, 480 V, three phase, 2000 rpm LXM32MC10N4 40 A, 400 V, three phase, 2000 rpm LXM32MC10N4 40 A, 480 V, three phase, 2000 rpm LXM32MD85N4 32 A, 400 V, three phase, 2000 rpm LXM32MD85N4 32 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 | 36.1 A |
| Continuous power | 7.95 W |
| Maximum current Irms | 124.26 A LXM32.D72N4 |
| Maximum permanent current | 124.5 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 | 3 |
| Torque constant | 1.8 N.m/A 248 °F (120 °C) |
| Back emf constant | 129.2 V/krpm 248 °F (120 °C) |
| Number of motor poles | 5.0 |
| Rotor inertia | 194.1 kg.cm² |
| Stator resistance | 0.13 Ohm 68 °F (20 °C) |
| Stator inductance | 1.81 mH 68 °F (20 °C) |
| Stator electrical time constant | 27.8 ms 68 °F (20 °C) |
| Maximum radial force Fr | 4500 N 1000 rpm |
| Maximum axial force Fa | 0.2 x Fr |
| Type of cooling | Natural convection |
| Length | 12.2 in (310 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 | 94.8 lb(US) (43 kg) |
| Sizing reference | BMH1903P |
| 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 | 124.26 A |
| Inertia | 0.0 kg.cm² of brake, 194.07 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 | BMH1903P21A2A |
|---|---|
| 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 | 3606485264264 |
Logistics 5
| Country of origin | DE |
|---|---|
| Shipping weight | 43.0 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
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Quick answers
Questions about the BMH
What is the rated current of BMH?
The rated current of BMH is 36.1 A.
What motor power is BMH rated for?
The rated motor power of BMH is 7.75 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 3606485264264.
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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