Frequency inverter | 7.5kW | 380-480V | 3F | IP20 | with filter | PROFINET | EtherNet/IP | 6SL3210-1KE21-7AF1 Siemens
Code: 6SL3210-1KE21-7AF1SINAMICS G120C – a reliable, compact, and versatile frequency converter designed for controlling the speed and torque of 3-phase motors. It is ideally suited for industrial processes, engineering systems, or equipment automation where energy savings, precise control, and reliability are essential. The device combines easy integration with modern communication interfaces (PROFINET, EtherNet/IP), making it an efficient solution for electricians, system engineers, and maintenance specialists.
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Technical Specifications
Input: 3-phase AC, 380–480 V ±10 %/−20 %, 47–63 Hz
Output: 3-phase AC, 400 V IEC / 480 V NEC
Rated power:
• LO (Low Overload): 7.5 kW / 10 HP, 21.5 A
• HO (High Overload): 5.5 kW / 7.5 HP, 18.2 AMaximum current: 25 A
Output frequency:
• For vector control: 0–240 Hz
• For V/f control: 0–550 HzOverload capacity:
• LO: 150 % IL 3 s / 110 % IL 57 s
• HO: 200 % IH 3 s / 150 % IH 57 sEfficiency: up to 97 %
Noise level: 63 dB
Communication: PROFINET, EtherNet/IP
Inputs / outputs:
• 6 digital inputs + 1 safe DI
• 2 digital outputs (1 relay, 1 transistor)
• 1 analog input (10-bit)
• 1 analog output
• Temperature sensor interface (PTC/KTY)Protection class: IP20
Dimensions: 100 × 196 × 203 mm
Weight: 2.3 kg
Standards compliance: CE, UL, cUL, KC, EAC, C-TickFunctions
Motor speed control – precise frequency and torque regulation.
Various control modes: V/f, ECO, FCC, sensorless vector control.
Integrated Class A filter – reduces electromagnetic interference.
Protection functions: overvoltage, undervoltage, overheating, short circuit.
Communication via PROFINET / EtherNet/IP – easy integration into automation systems.
Compact design – saves space in cabinets.
Efficiency up to 97 % – lower energy consumption.
Applications
For households or small users: suitable for small workshops or farms to control pumps, fans, compressors.
For engineers: easy integration into manufacturing or building management systems due to PROFINET/EtherNet/IP and versatile control modes.
For electricians: compact design, standard terminals, and easy installation on DIN rail or cabinet wall.
In industry: used for conveyors, fans, pumps, mixers, drives, CNC machines.
Pros
Compact size – saves space in the cabinet.
Wide selection of control modes (V/f, ECO, sensorless vector).
High efficiency (up to 97 %) – lower energy consumption.
Quiet operation (63 dB).
Integrated communication interfaces (PROFINET, EtherNet/IP).
High overload capacity – suitable for heavy loads.
Versatile use in industry and smaller systems.
Cons
Protection class only IP20 – requires cabinet installation.
More complex configuration requires technical knowledge.
Maximum cable length limited (50 m shielded, 100 m unshielded).
Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.ManufacturerThe IP protection class indicates the device's resistance to environmental factors.

The first digit indicates protection against dust and solid objects.
The second digit indicates protection against moisture.First digit values:
X — Untested;
0 — No protection;
1 — Protected against solid objects larger than 50 mm;
2 — Protected against solid objects larger than 12.5 mm;
3 — Protected against solid objects larger than 1 mm;
4 — Protected against solid objects larger than 1 mm;
5 — Dust protected;
6 — Totally dustproof.
Second digit values:X — Untested;
0 — No protection;
1 — Protected against vertically falling water drops;
2 — Protected against water drops falling at a 15º angle;
3 — Protected against rain falling at a 60º angle;
4 — Protected against water splashes;
5 — Protected against water jets;
6 — Protected against large amounts of water;
7 — Protected against short-term immersion in water up to 1 meter deep;
8 — Protected against long-term immersion in water up to 3 meters deep.This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.
CE certification means that the product has been evaluated according to the main criteria:
Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purposeCE marking allows this product to:
be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environmentsThe CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.
What does this mean for you as a buyer?
Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions
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