Frequency inverter | 7.5kW | 380-480V | 3F | IP20 | PROFIBUS DP | 6SL3210-1KE21-7AP1 Siemens
Code: 6SL3210-1KE21-7AP1Siemens SINAMICS G120C – a compact and reliable frequency converter designed for controlling various types of electric motors in industrial, commercial, and technical installations. It ensures high energy efficiency (up to 97%), convenient operation, extensive communication options (PROFIBUS DP), and integrated protection.
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Technical Specifications
Input: 3 AC, 380–480 V (+10% / -20%), 47–63 Hz
Output: 3 AC, 400 V
Rated power: 7.5 kW (LO), 5.5 kW (HO)
Rated current: 17 A (IN), 16.5 A (LO), 12.5 A (HO)
Maximum output current: 25 A
Output frequency: 0–240 Hz (vector control), 0–550 Hz (V/f control)
Control types: V/f (linear, quadratic, ECO), FCC, sensorless vector control
Efficiency: up to 97%
Protection class: IP20 (UL open type)
Dimensions: 100 × 196 × 203 mm
Weight: 2.3 kg
Noise level: 63 dB
Max. motor cable length: 50 m (shielded), 100 m (unshielded)
Environmental conditions: -10…+40 °C operation, up to 95% humidity (non-condensing)
Interfaces: PROFIBUS DP, 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output
Standards: UL, cUL, CE, C-Tick (RCM)Functions
Frequency control with V/f curve, ECO mode, or sensorless vector control.
Integrated fan with air cooling ensures reliable operation.
PROFIBUS DP communication enables integration into various automation systems.
PTC/KTY sensor interface for motor temperature monitoring and protection.
Compact size – easy to install even in limited space.
Automatic voltage protection and integrated braking resistor connection.
Applications
For home users: suitable for pumps, fans, compressors, or other equipment to save energy and extend service life.
For engineers: provides flexible control options, precise speed regulation, communication with other systems, and reliable process automation.
For electricians: easy installation, simple wiring with plug-in terminals, clear documentation, and compatibility with various devices.
In industry: used in conveyor lines, pump stations, manufacturing equipment.
In commerce: applied in air supply systems, ventilation, elevators, refrigeration units.
Pros
High efficiency – up to 97% energy utilization.
Compact design – requires little space.
Reliable cooling – ensures long-term operation.
Wide functionality – multiple control modes.
Easy integration – PROFIBUS DP communication.
Certified by international standards (UL, CE, cUL, RCM).
Cons
IP20 protection class – not suitable for harsh environments without an additional enclosure.
No integrated touch panel – requires a separate control module.
No encoder support.
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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