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
- 1FK7105-2AF71-1QA0
SIMOTICS SSiemens 1FK7105-2AF71-1QA0 SIMOTICS S 1FK7-CT 48 Nm 3000 rpm Servo Motor
Siemens 1FK7-CT synchronous servo motor, 48 Nm, 8.2 kW, 3000 rpm, IP64, Drive-CLiQ absolute encoder, no holding brake.
Description
About the 1FK7105-2AF71-1QA0
About the 1FK7105-2AF71-1QA0
The Siemens 1FK7105-2AF71-1QA0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated at 8.2 kW with a 48 Nm standstill torque at 3000 rpm nominal speed. It runs from a 600 V DC bus, mounts in IM B5 (IM V1, IM V3) configuration with Flange 1 and a rotatable power connector, and carries a Drive-CLiQ absolute single-turn 20-bit encoder (AS20DQI) with IP64 protection and no holding brake.
Selection Notes
This AF71 winding is rated for a 3000 rpm nominal speed at 48 Nm standstill torque, a higher-speed option than a lower-speed winding offered in the same 1FK7105 frame, so it fits axes that need faster point-to-point moves at this torque level. Without a holding brake, the servo drive or an external brake must hold the axis at standstill; the same frame is also available with an integrated brake for vertical or overhung-load axes. At 39.001 kg, this is among the larger motors in this product line, so mounting and coupling hardware should be sized accordingly.
Specification
Full specification
Engineering data 10
| Rated speed (100 K) | 3,000 rpm |
|---|---|
| Number of poles | 8 |
| Rated torque (100 K) | 26.0 Nm |
| Rated current | 18.0 A |
| Static torque (60 K) | 40.00 Nm |
| Static torque (100 K) | 48.00 Nm |
| Stall current (60 K) | 25.00 A |
| Stall current (100 K) | 31.00 A |
| Moment of inertia | 154.000 kgcm² |
| Efficiency | 94.0 % |
Physical constants 9
| Torque constant | 1.55 Nm/A |
|---|---|
| Voltage constant at 20º C | 102.0 V/1000*min¯¹ |
| Winding resistance at 20º C | 0.07 Ω |
| Rotating field inductance | 1.9 mH |
| Electrical time constant | 26.00 ms |
| Mechanical time constant | 1.40 ms |
| Thermal time constant | 70 min |
| Shaft torsional stiffness | 125,000 Nm/rad |
| Net weight of the motor | 39.0 kg Permanent-magnet synchronous |
Mechanical data 16
| Motor type | motor Compact |
|---|---|
| Shaft height | 100 |
| Cooling | Natural cooling |
| Radial runout tolerance | 0.050 mm |
| Concentricity tolerance | 0.10 mm |
| Axial runout tolerance | 0.10 mm |
| Vibration severity grade | Grade A |
| Connector size | M40 |
| 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 | without holding brake |
| Shaft end | Feather key |
| Encoder system | Encoder AS20DQI: absolute encoder single-turn 20 bits |
Show all 54 specifications ↓ Show less ↑19 more values in Identification, Optimum operating point, Limiting data, Recommended Motor Module, Logistics.
Identification 5
| Part number | 1FK7105-2AF71-1QA0 |
|---|---|
| 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 | 8.2 kW |
Limiting data 4
| Max. permissible speed (mech.) | 5,000 rpm |
|---|---|
| Max. permissible speed (inverter) | 5,000 rpm |
| Maximum torque | 150.0 Nm |
| Maximum current | 109.0 A |
Recommended Motor Module 4
| Rated inverter current | 30 A |
|---|---|
| Maximum inverter current | 90 A |
| Maximum torque | 129.70 Nm |
| Page 1 of 1 | Generated Sun Nov 1 02:26:25 CET 2026 |
Logistics 4
| Shipping weight | 44.001 kg |
|---|---|
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 1FK7105-2AF71-1QA0
No documents are on file for this part yet.
Ask us for the datasheet
Quick answers
Questions about the 1FK7105-2AF71-1QA0
What motor power is 1FK7105-2AF71-1QA0 rated for?
The rated motor power of 1FK7105-2AF71-1QA0 is 8.2 kW.
What is the HS code of 1FK7105-2AF71-1QA0 for customs?
The tariff (HS) code on file for 1FK7105-2AF71-1QA0 is 85015230.
Where does 1FK7105-2AF71-1QA0 ship from, and how fast?
1FK7105-2AF71-1QA0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
Guides for servo drives
What Benefits Do Schneider Soft Starters Offer?
Discover how Schneider soft starters reduce mechanical stress, cut energy peaks, and extend motor life across demanding industrial uses. Shop at Stoklink.
How Do Schneider Soft Starters Reduce Energy Costs?
Schneider soft starters reduce energy costs by limiting inrush current, lowering demand charges, and minimizing mechanical wear on motors. Shop at Stoklink.
Reviews
Customer reviews
Series
Siemens SIMOTICS S
- Brand
- Siemens
- Series
- SIMOTICS S
