Siemens 6SL3210-1KE21-3AF1 SINAMICS G120C Inverter 5.5kW 3AC 400V

The Siemens 6SL3210-1KE21-3AF1 is a SINAMICS G120C compact frequency inverter for three-phase AC motors, rated 5.5 kW at Low Overload with a 380 to 480 V AC supply. It integrates PROFINET and EtherNet/IP communication directly and achieves an efficiency of 0.97, making it suitable for industrial variable-speed applications.

Technical specifications:

• MLFB: 6SL3210-1KE21-3AF1
• Manufacturer: Siemens
• Product line: SINAMICS G120C
• Input: 3 AC, 380-480 V (+10% / -20%), 47-63 Hz
• Input rated current: 16.5 A (LO) / 12.8 A (HO)
• Rated output power: 5.5 kW / 7.5 hp (LO); 4.0 kW / 5.0 hp (HO)
• Rated output current: 12.5 A (LO) / 8.8 A (HO); rated current IN: 13.0 A
• Max. output current: 17.6 A
• Output frequency: 0-240 Hz (vector control); 0-550 Hz (V/f control)
• Communication: PROFINET, EtherNet/IP
• Digital inputs: 6 standard + 1 fail-safe
• Digital outputs: 1 relay changeover contact + 1 transistor (DC 30 V, 0.5 A each)
• Analog inputs: 1 differential, 10-bit; analog outputs: 1 non-isolated
• Integrated EMC filter: Class A
• Efficiency class: IE2; efficiency 0.97; power loss 173 W
• Degree of protection: IP20 / UL open type
• Frame size: FSB
• Operating temperature: -10 to 40°C
• Dimensions (W x H x D): 100 x 196 x 203 mm
• Net weight: 2.30 kg
• Max. shielded motor cable: 50 m; unshielded: 100 m
• Standards: CE, cUL, UL, KC, EAC, C-Tick (RCM)

Features and benefits:

• Sensorless vector control and multiple V/f modes (linear, square-law, FCC, ECO) without an external encoder
• High Overload capability: 200% base load current for 3 s, followed by 150% for 57 s in a 300 s cycle
• Integrated Class A EMC filter eliminates the need for a separate line filter in most installations
• Motor temperature monitoring via PTC, KTY, or Thermo-Click sensor input with accuracy to ±5°C
• Fail-safe digital input supports safety-rated stop functions without external safety relay

Applications:

• Variable-speed control of three-phase induction motors in pumps, fans, and compressors
• Conveyor and material handling systems requiring direct PROFINET or EtherNet/IP network integration
• HVAC drives where V/f ECO mode reduces energy consumption at partial loads
• Machinery requiring a compact drive (100 x 196 x 203 mm, 2.30 kg) in space-constrained control cabinets

Compliant with EMC Directive 2004/108/EC and Low-Voltage Directive 2006/95/EC. Part of the Siemens SINAMICS range.

Also known as: Siemens 6SL3210-1KE21-3AF1, SINAMICS G120C 5.5 kW variable frequency drive.