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
- 1FK7032-2AF21-1QB0
SIMOTICS SSiemens 1FK7032-2AF21-1QB0 SIMOTICS S 1FK7-CT 1.2 Nm 3000 rpm Servo Motor
Siemens 1FK7032-2AF21-1QB0 1FK7-CT servo motor, 1.2 Nm, 0.31 kW at 3000 rpm, holding brake, IP64, DRIVE-CLiQ 20-bit absolute encoder.
Description
About the 1FK7032-2AF21-1QB0
About the 1FK7032-2AF21-1QB0
Siemens 1FK7032-2AF21-1QB0 SIMOTICS S 1FK7-CT servo motor delivers 1.2 Nm standstill torque and 0.31 kW rated power at 3000 rpm on a 300 V DC link. It is a 6-pole design with 1.6 A rated current, IP64 protection, a 20-bit single-turn absolute encoder (AS20DQI) with a DRIVE-CLiQ interface, and an integrated holding brake.
Selection Notes
This is the holding-brake version of the 300 V, 3000 rpm 1FK7032-CT variant: the brake adds mass over the non-brake motor, raising rotor inertia to 0.750 kgcm² and lowering shaft torsional stiffness to 4,100 Nm/rad. Choose it for vertical or gravity-loaded axes that must hold position without drive power; where the axis is horizontal or an external holding mechanism already exists, the non-brake version is lighter and stiffer. Against the 600 V / 6000 rpm siblings in this frame, this 300 V variant suits converters and mains supplies limited to the lower DC-link voltage, at the cost of top speed.
Applications
1.2 Nm at 3000 rpm with a holding brake suits small vertical pick-and-place axes, indexing tables, and light conveyor drives in machine-tool and packaging cells where the axis must stay in position when the servo drive is de-energized.
Specification
Full specification
Engineering data 10
| Rated speed (100 K) | 3,000 rpm |
|---|---|
| Number of poles | 6 |
| Rated torque (100 K) | 1.0 Nm |
| Rated current | 1.6 A |
| Static torque (60 K) | 0.95 Nm |
| Static torque (100 K) | 1.15 Nm |
| Stall current (60 K) | 1.40 A |
| Stall current (100 K) | 1.70 A |
| Moment of inertia | 0.750 kgcm² |
| Efficiency | 85.0 % |
Physical constants 9
| Torque constant | 0.67 Nm/A |
|---|---|
| Voltage constant at 20º C | 45.0 V/1000*min¯¹ |
| Winding resistance at 20º C | 5.05 Ω |
| Rotating field inductance | 17.3 mH |
| Electrical time constant | 3.45 ms |
| Mechanical time constant | 2.20 ms |
| Thermal time constant | 25 min |
| Shaft torsional stiffness | 4,100 Nm/rad |
| Net weight of the motor | 3.1 kg Permanent-magnet synchronous |
Mechanical data 16
| Motor type | motor Compact |
|---|---|
| Shaft height | 36 |
| Cooling | Natural cooling |
| Radial runout tolerance | 0.035 mm |
| Concentricity tolerance | 0.08 mm |
| Axial runout tolerance | 0.08 mm |
| Vibration severity grade | Grade A |
| Connector size | M23 |
| Degree of protection | IP64 |
| Design acc. to Code I | IM B5 (IM V1, IM V3) |
| Temperature monitoring | Pt1000 temperature sensor |
| Electrical connectors | Connectors for signals and power rotatable |
| Color of the housing | Standard (Anthracite RAL 7016) |
| Holding brake | with holding brake |
| Shaft end | Feather key |
| Encoder system | Encoder AS20DQI: absolute encoder single-turn 20 bits |
Show all 61 specifications ↓ Show less ↑26 more values in Identification, Optimum operating point, Limiting data, Holding brake, Recommended Motor Module, Logistics.
Identification 5
| Part number | 1FK7032-2AF21-1QB0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
Optimum operating point 2
| Optimum speed | 3,000 rpm |
|---|---|
| Optimum power | 0.3 kW |
Limiting data 4
| Max. permissible speed (mech.) | 10,000 rpm |
|---|---|
| Max. permissible speed (inverter) | 6,400 rpm |
| Maximum torque | 4.5 Nm |
| Maximum current | 7.0 A |
Holding brake 7
| Holding brake version | Permanent-magnet brake |
|---|---|
| Holding torque | 1.9 Nm |
| Power supply voltage | DC 24 V ± 10 % |
| Coil current | 0.3 A |
| Opening time | 50 ms |
| Closing time | 30 ms |
| Highest braking work | 40 J |
Recommended Motor Module 4
| Rated inverter current | 2A |
|---|---|
| Maximum inverter current | 5A |
| Maximum torque | 3.00 Nm |
| Page 1 of 1 | Generated Sun Nov 1 02:13:23 CET 2026 |
Logistics 4
| Shipping weight | 3.5 kg |
|---|---|
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
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Quick answers
Questions about the 1FK7032-2AF21-1QB0
What is the rated current of 1FK7032-2AF21-1QB0?
The rated current of 1FK7032-2AF21-1QB0 is 1.6 A.
What motor power is 1FK7032-2AF21-1QB0 rated for?
The rated motor power of 1FK7032-2AF21-1QB0 is 0.31 kW.
What is the HS code of 1FK7032-2AF21-1QB0 for customs?
The tariff (HS) code on file for 1FK7032-2AF21-1QB0 is 85015100.
Where does 1FK7032-2AF21-1QB0 ship from, and how fast?
1FK7032-2AF21-1QB0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
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Series
Siemens SIMOTICS S
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- Siemens
- Series
- SIMOTICS S
