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
- 1FK7083-2AH71-1QB0
SIMOTICS SSiemens 1FK7083-2AH71-1QB0 SIMOTICS S 1FK7-CT 1.4 kW 16 Nm Holding Brake Servo Motor
Siemens 1FK7-CT servo motor, 1.4 kW, 16 Nm, 4,500 rpm, IP64, holding brake.
Description
About the 1FK7083-2AH71-1QB0
About the 1FK7083-2AH71-1QB0
The Siemens 1FK7083-2AH71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 1.4 kW with 16 Nm standstill torque at 100K and a 4,500 rpm rated speed, built with an integrated holding brake. It runs on a 600 V DC link, mounts as IMB5, and carries an IP64 enclosure with an absolute 20-bit single-turn DRIVE-CLiQ encoder.
Selection Notes
Choose this holding-brake winding over the non-brake 4,500 rpm variant when the axis is vertical or gravity-loaded and must keep the 16 Nm standstill torque applied through an E-stop or power loss. Net weight rises to 15.9 kg from the added brake hardware; rated power, torque, and speed are unchanged.
Specification
Full specification
Engineering data 10
| Rated speed (100 K) | 4,500 rpm |
|---|---|
| Number of poles | 8 |
| Rated torque (100 K) | 3.0 Nm |
| Rated current | 3.6 A |
| Static torque (60 K) | 13.30 Nm |
| Static torque (100 K) | 16.00 Nm |
| Stall current (60 K) | 12.20 A |
| Stall current (100 K) | 15.00 A |
| Moment of inertia | 29.500 kgcm² |
| Efficiency | 93.0 % |
Physical constants 9
| Torque constant | 1.06 Nm/A |
|---|---|
| Voltage constant at 20º C | 69.0 V/1000*min¯¹ |
| Winding resistance at 20º C | 0.17 Ω |
| Rotating field inductance | 3.2 mH |
| Electrical time constant | 19.30 ms |
| Mechanical time constant | 1.14 ms |
| Thermal time constant | 50 min |
| Shaft torsional stiffness | 72,000 Nm/rad |
| Net weight of the motor | 18.6 kg Permanent-magnet synchronous |
Mechanical data 16
| Motor type | motor Compact |
|---|---|
| Shaft height | 80 |
| 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 | 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 | 1FK7083-2AH71-1QB0 |
|---|---|
| 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 | 3.3 kW |
Limiting data 4
| Max. permissible speed (mech.) | 6,000 rpm |
|---|---|
| Max. permissible speed (inverter) | 6,000 rpm |
| Maximum torque | 50.0 Nm |
| Maximum current | 55.0 A |
Holding brake 7
| Holding brake version | Permanent-magnet brake |
|---|---|
| Holding torque | 22.0 Nm |
| Power supply voltage | DC 24 V ± 10 % |
| Coil current | 0.9 A |
| Opening time | 200 ms |
| Closing time | 60 ms |
| Highest braking work | 1,400 J |
Recommended Motor Module 4
| Rated inverter current | 18 A |
|---|---|
| Maximum inverter current | 54 A |
| Maximum torque | 49.30 Nm |
| Page 1 of 1 | Generated Sun Nov 1 02:22:58 CET 2026 |
Logistics 4
| Shipping weight | 17.9 kg |
|---|---|
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 1FK7083-2AH71-1QB0
No documents are on file for this part yet.
Ask us for the datasheet
Quick answers
Questions about the 1FK7083-2AH71-1QB0
What motor power is 1FK7083-2AH71-1QB0 rated for?
The rated motor power of 1FK7083-2AH71-1QB0 is 1.4 kW.
What is the HS code of 1FK7083-2AH71-1QB0 for customs?
The tariff (HS) code on file for 1FK7083-2AH71-1QB0 is 85015220.
Where does 1FK7083-2AH71-1QB0 ship from, and how fast?
1FK7083-2AH71-1QB0 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
