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1FK7103-2AF74-1TH0
Siemens 1FK7103-2AF74-1TH0 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 1FK7103-2AF74-1TH0 is a compact permanent-magnet synchronous servomotor from the SIMOTICS S-1FK7 range. It provides a rated torque of 14 Nm at 3,000 rpm, with a maximum torque of 108 Nm and a maximum permissible speed of 5,000 rpm. Natural cooling allows heat dissipation without an additional cooling fan.
This model features a two-pole resolver for feedback and a Pt1000 sensor for temperature monitoring. Its integrated permanent-magnet holding brake supplies 43 Nm of holding torque and operates from a 24 V DC supply. A plain shaft and IM B5 flange-mounted construction provide the mechanical interface, while rotatable power and signal connectors offer flexibility when arranging cables.
With an IP64 protection rating and an anthracite RAL 7016 housing, the 1FK7103-2AF74-1TH0 combines a compact design with clearly defined electrical and mechanical specifications. The motor has a rated current of 11.5 A and a net weight of 33 kg.
This model features a two-pole resolver for feedback and a Pt1000 sensor for temperature monitoring. Its integrated permanent-magnet holding brake supplies 43 Nm of holding torque and operates from a 24 V DC supply. A plain shaft and IM B5 flange-mounted construction provide the mechanical interface, while rotatable power and signal connectors offer flexibility when arranging cables.
With an IP64 protection rating and an anthracite RAL 7016 housing, the 1FK7103-2AF74-1TH0 combines a compact design with clearly defined electrical and mechanical specifications. The motor has a rated current of 11.5 A and a net weight of 33 kg.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 1FK7103-2AF74-1TH0 |
| Product Range | SIMOTICS S-1FK7 |
| Product Description | Compact permanent-magnet synchronous servomotor combining resolver feedback, an integrated holding brake and natural cooling for controlled rotary motion. |
| Motor Design | Compact |
| Rated Speed | 3,000 rpm at 100 K temperature rise |
| Rated Torque | 14.0 Nm at 100 K temperature rise |
| Rated Current | 11.5 A |
| Standstill Torque | 30.0 Nm at 60 K; 36.0 Nm at 100 K |
| Standstill Current | 21.0 A at 60 K; 26.0 A at 100 K |
| Maximum Permissible Speed | 5,000 rpm, both mechanical and inverter limits |
| Maximum Torque | 108.0 Nm |
| Maximum Current | 84.0 A |
| Number of Poles | 8 |
| Optimum Operating Point | 5.4 kW at 2,500 rpm |
| Efficiency | 93.0% |
| Rotor Moment of Inertia | 112.000 kg·cm² |
| Torque Constant | 1.39 Nm/A |
| Voltage Constant | 89.5 V per 1,000 rpm at 20°C |
| Winding Resistance | 0.09 Ω at 20°C |
| Rotating Field Inductance | 2.4 mH |
| Electrical Time Constant | 27.00 ms |
| Mechanical Time Constant | 1.46 ms |
| Thermal Time Constant | 65 minutes |
| Shaft Torsional Stiffness | 108,000 Nm/rad |
| Cooling Method | Natural cooling |
| Degree of Protection | IP64 |
| Mounting Arrangement | IM B5; also specified for IM V1 and IM V3 |
| Shaft End | Plain shaft |
| Feedback System | Two-pole resolver |
| Temperature Monitoring | Pt1000 temperature sensor |
| Electrical Connections | Rotatable power and signal connectors |
| Connector Size | 1.5 |
| Holding Brake Type | Permanent-magnet holding brake |
| Brake Holding Torque | 43.0 Nm |
| Brake Supply Voltage | 24 V DC ±10% |
| Brake Coil Current | 1.0 A |
| Brake Opening Time | 300 ms |
| Brake Closing Time | 70 ms |
| Maximum Braking Work | 3,380 J |
| Recommended Motor Module Current | 30 A rated; 90 A maximum |
| Radial Runout Tolerance | 0.050 mm |
| Concentricity Tolerance | 0.10 mm |
| Axial Runout Tolerance | 0.10 mm |
| Vibration Severity | Grade A |
| Housing Colour | Anthracite, RAL 7016 |
| Net Motor Weight | 33.0 kg |
What type of motor is this?
The 1FK7103-2AF74-1TH0 is a compact permanent-magnet synchronous motor from the SIMOTICS S-1FK7 range. It features natural cooling, a two-pole resolver and an integrated holding brake.
What are the rated speed and torque?
The rated speed is 3,000 rpm and the rated torque is 14 Nm, both specified at a 100 K temperature rise. The rated current is 11.5 A.
What is the maximum permissible speed?
The maximum permissible speed is 5,000 rpm for both the mechanical and inverter-related limits. This is distinct from the rated speed of 3,000 rpm.
How much torque can the motor produce at standstill?
The motor has a standstill torque of 30 Nm at a 60 K temperature rise and 36 Nm at a 100 K temperature rise. The corresponding standstill currents are 21 A and 26 A.
What are the maximum torque and current limits?
The maximum motor torque is 108 Nm and the maximum current is 84 A. These are limiting values rather than continuous operating ratings.
What feedback device is fitted?
A two-pole resolver provides rotor position feedback. The feedback arrangement should be checked against the intended drive configuration when selecting a replacement motor.
What are the holding brake specifications?
The permanent-magnet holding brake provides 43 Nm of holding torque. Its coil requires a 24 V DC supply with a tolerance of ±10% and draws 1 A. The specified opening time is 300 ms and the closing time is 70 ms.
What shaft and mounting arrangement does the motor have?
The motor has a plain shaft and an IM B5 mounting arrangement, with IM V1 and IM V3 configurations also listed. Its shaft height is 100 mm.
How is the motor cooled and its temperature monitored?
The 1FK7103-2AF74-1TH0 uses natural cooling and has a Pt1000 temperature sensor for temperature monitoring.
What electrical connections are provided?
The motor has rotatable connectors for power and signals. The specified connector size is 1.5.
What is the enclosure protection rating?
The specified degree of protection is IP64.
What is the motor’s net weight?
The motor has a specified net weight of 33 kg.
What power is listed at the optimum operating point?
The listed optimum operating point is 5.4 kW at 2,500 rpm. This is separate from the rated operating point of 14 Nm at 3,000 rpm.
What inverter current ratings are recommended?
The recommended Motor Module ratings are 30 A rated inverter current and 90 A maximum inverter current. These values should not be confused with the motor’s own rated current of 11.5 A and maximum current of 84 A.
- Precision positioning of machine-tool feed axes during machining operations.
- Controlled movement of packaging machinery for indexing, sealing and cutting tasks.
- Servo-driven operation of automated assembly stations requiring repeatable positioning.
- Driving material-handling equipment, including transfer units and positioning tables.
- Coordinated axis movement in printing and converting machinery.
- Accurate motion control in winding and unwinding equipment.
- Positioning of industrial automation axes requiring an integrated holding brake.
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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