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.
The Schneider Electric BCH18LM30332F6C is a low-inertia Easy Lexium 18 BCH18 servo motor rated for 3.0 kW continuous power with an integrated holding brake. It produces 9.8 N·m nominal torque at 3000 rpm (6000 rpm maximum mechanical speed), draws 18.6 A continuous stall current, and combines a 23-bit incremental encoder with a 130 mm flange.
This brake-equipped BCH18 variant sizes to the 3.0 kW LXM18 servo drive at the same 18.6 A continuous rating as the non-brake 130 mm-flange version. Its 20 N·m holding brake is more than double the 6.5 N·m brake used on the 100 mm-flange BCH18 motors, matching the higher 9.8 N·m continuous torque and the larger overhung loads typical of this frame size. The 23-bit incremental encoder loses absolute position on power-down, so startup still requires a homing move even with the brake engaged — the multi-turn encoder version removes that step for applications that cannot tolerate it. Peak stall torque of 29.4 N·m covers acceleration bursts well above the 9.8 N·m continuous rating, and the brake assembly raises rotor inertia to 8.3 kg.cm² against 7.63 kg.cm² for the non-brake version of this frame.
| Range of product | Lexium 18 |
|---|---|
| Range compatibility | Lexium 18 |
| Product or component type | Servo motor |
| Device short name | BCH18 |
| Maximum mechanical speed | 6000.0 rpm |
|---|---|
| [Us] rated supply voltage | 200...240 V |
| Continuous stall current | 18.6 A |
| Continuous stall torque | 9.8 N.m, 220 V |
| Continuous power | 3000 W |
| Peak stall torque | 29.4 N.m, 220 V |
| Nominal output power | 3000 W, 220 V |
| Nominal torque | 9.8 N.m, 220 V |
| Nominal speed | 3000 rpm, 220 V |
| Maximum permanent current | 56.0 A |
| Shaft end | Parallel key |
| Shaft diameter | 28 mm |
| Shaft length | 63 mm |
| Key width | 8 mm |
| Feedback type | 23 bits optic incremental encoder |
| Holding brake | With |
| Holding torque | 20.0 N.m |
| Mounting support | Asian standard flange |
| Motor flange size | 130 mm |
| Electrical connection | 2 connectors male/female |
| Torque constant | 0.53 N.m/A at 40 °C |
| Back emf constant | 35.0 V/krpm at 40 °C |
| Number of motor poles | 5.0 |
| Rotor inertia | 8.3 kg.cm² |
| Stator resistance | 0.1 Ohm |
| Stator inductance | 1.53 mH |
| Maximum radial force Fr | 980 N |
| Maximum axial force Fa | 392 N |
| Length | 251.5 mm |
| Number of mounting holes | 4.0 |
| Circle diameter of the mounting holes | 9.0 mm |
| Width | 248.5 mm |
| Height | 130.0 mm |
| Depth | 251.5 mm |
| Net weight | 11.8 kg |
| Network number of phases | 3 |
| Encoder type | Optic encoder |
| Inertia | 8.3 kg.cm² of brake, 0.0 kg.cm² of motor |
| IP degree of protection | IP67 |
|---|---|
| Ambient air temperature for operation | 0…40 °C |
| Part number | BCH18LM30332F6C |
|---|---|
| Type designation | BCH18 |
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| Warranty (in months) | 18 |
|---|
| Unit Type of Package 1 | PCE |
|---|---|
| Number of Units in Package 1 | 1 |
| Package 1 Height | 25 cm |
| Package 1 Width | 20 cm |
| Package 1 Length | 40 cm |
| Package 1 Weight | 12.82 kg |
| Unit Type of Package 2 | P06 |
| Number of Units in Package 2 | 18 |
| Package 2 Height | 105.0 cm |
| Package 2 Width | 60.0 cm |
| Package 2 Length | 80.0 cm |
| Package 2 Weight | 230.76 kg |
| Shipping weight | 11.8 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
No documents are on file for this part yet.
Ask us for the datasheetThe rated current of BCH18 is 18.6 A.
The rated motor power of BCH18 is 3 kW.
The tariff (HS) code on file for BCH18 is 850152.
BCH18 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
A side-by-side comparison of VFD and servo drive motor type, feedback, dynamic response, overload rating, cost, and applications for industrial engineers.
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