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
- 1FK7083-2AC71-1QB0
SIMOTICS SSiemens 1FK7083-2AC71-1QB0 SIMOTICS S 1FK7-CT 2.6 kW 16 Nm Holding Brake Servo Motor
Siemens 1FK7-CT servo motor, 2.6 kW, 16 Nm, 2,000 rpm, IP64, holding brake.
Description
About the 1FK7083-2AC71-1QB0
About the 1FK7083-2AC71-1QB0
The Siemens 1FK7083-2AC71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 2.6 kW with 16 Nm standstill torque at 100K and a 2,000 rpm rated speed, built with an integrated holding brake. It runs on a 600 V DC link, uses natural cooling, and carries an IP64 enclosure with an absolute 20-bit single-turn DRIVE-CLiQ encoder (AS20DQI).
Selection Notes
The holding brake raises rotor inertia from the brakeless winding's 26.000 kgcm² to 29.500 kgcm² and lowers shaft torsional stiffness from 101,000 to 72,000 Nm/rad, so allow for reduced servo-loop bandwidth versus the non-brake motor. Use it on vertical or gravity-loaded 16 Nm axes where the 2,000 rpm winding must hold position without drive power. Rated current, power, and speed match the non-brake variant, so drive sizing is unchanged.
Applications
Typical use: vertical or overhung axes on machine tools and material-handling stations where load must not drop when power is removed.
Specification
Full specification
Engineering data 10
| Rated speed (100 K) | 2,000 rpm |
|---|---|
| Number of poles | 8 |
| Rated torque (100 K) | 12.5 Nm |
| Rated current | 6.3 A |
| Static torque (60 K) | 13.30 Nm |
| Static torque (100 K) | 16.00 Nm |
| Stall current (60 K) | 6.10 A |
| Stall current (100 K) | 7.50 A |
| Moment of inertia | 29.500 kgcm² |
| Efficiency | 93.0 % |
Physical constants 9
| Torque constant | 2.13 Nm/A |
|---|---|
| Voltage constant at 20º C | 138.5 V/1000*min¯¹ |
| Winding resistance at 20º C | 0.66 Ω |
| Rotating field inductance | 12.8 mH |
| Electrical time constant | 19.40 ms |
| Mechanical time constant | 1.13 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 | 1FK7083-2AC71-1QB0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
Optimum operating point 2
| Optimum speed | 2,000 rpm |
|---|---|
| Optimum power | 2.6 kW |
Limiting data 4
| Max. permissible speed (mech.) | 6,000 rpm |
|---|---|
| Max. permissible speed (inverter) | 4,150 rpm |
| Maximum torque | 50.0 Nm |
| Maximum current | 27.5 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 | 9A |
|---|---|
| Maximum inverter current | 27 A |
| Maximum torque | 49.30 Nm |
| Page 1 of 1 | Generated Sun Nov 1 02:22:13 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
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Quick answers
Questions about the 1FK7083-2AC71-1QB0
What is the rated current of 1FK7083-2AC71-1QB0?
The rated current of 1FK7083-2AC71-1QB0 is 6.3 A.
What motor power is 1FK7083-2AC71-1QB0 rated for?
The rated motor power of 1FK7083-2AC71-1QB0 is 2.6 kW.
What is the HS code of 1FK7083-2AC71-1QB0 for customs?
The tariff (HS) code on file for 1FK7083-2AC71-1QB0 is 85015220.
Where does 1FK7083-2AC71-1QB0 ship from, and how fast?
1FK7083-2AC71-1QB0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
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Customer reviews
Series
Siemens SIMOTICS S
- Brand
- Siemens
- Series
- SIMOTICS S
