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 BCH18LM3033CA6C is a low-inertia Easy Lexium 18 BCH18 servo motor rated for 3.0 kW continuous power. It delivers 9.8 N·m nominal torque at 3000 rpm (6000 rpm maximum mechanical speed), draws 18.6 A continuous stall current, and carries a 23-bit multi-turn absolute encoder on a 130 mm flange without a holding brake.
This no-brake, multi-turn-encoder BCH18 variant matches the 3.0 kW LXM18 servo drive at its 18.6 A continuous current rating, the same drive class used by the incremental-encoder version of this 130 mm-flange motor. The 23-bit multi-turn absolute encoder keeps position reference through power cycles, so the axis restarts without a homing move — valuable on this higher-torque frame where re-homing under load takes longer than on the smaller BCH18 variants. No holding brake means the axis free-wheels once drive power drops; choose the brake-equipped 130 mm variant where the load must stay in place unpowered. Peak stall torque of 29.4 N·m gives headroom for acceleration bursts above the 9.8 N·m continuous rating, and the 7.63 kg.cm² rotor inertia is identical to the incremental-encoder version of this frame, so encoder choice alone does not change dynamic response. The 28 mm shaft and 130 mm flange are common to every 3.0 kW BCH18 variant, so the mechanical interface to the driven load stays the same regardless of brake or encoder selection.
| 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 | 220 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 current Irms | at 3.0 kW, 220 V |
| Maximum permanent current | 56.0 A |
| Product compatibility | Motion servo drive motion servo motors motor at 3.0 kW, 220 V |
| Shaft end | Parallel key |
| Shaft diameter | 28.0 mm |
| Shaft length | 63.0 mm |
| Key width | 8.0 mm |
| Feedback type | 23 bits optic multi turn encoder |
| Holding brake | Without |
| Mounting support | Asian standard flange |
| Motor flange size | 130 mm |
| Electrical connection | 2 connectors male/female |
| Number of motor poles | 5.0 |
| Rotor inertia | 7.63 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 | 208.9 mm |
| Number of mounting holes | 4 |
| Circle diameter of the mounting holes | 9 mm |
| Width | 208.9 mm |
| Height | 130.0 mm |
| Depth | 182.4 mm |
| Net weight | 10.3 kg |
| Network number of phases | 3 |
| Encoder type | Optic encoder |
| Inertia | 0.0 kg.cm² of brake, 7.63 kg.cm² of motor |
| IP degree of protection | IP67 |
|---|
| Part number | BCH18LM3033CA6C |
|---|---|
| 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 | 30 cm |
| Package 1 Length | 40 cm |
| Package 1 Weight | 11.3855 kg |
| Unit Type of Package 2 | P06 |
| Number of Units in Package 2 | 18 |
| Package 2 Height | 105 cm |
| Package 2 Width | 60 cm |
| Package 2 Length | 80 cm |
| Package 2 Weight | 204.939 kg |
| Shipping weight | 10.3 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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