Name: Siemens SINAMICS G120C 5.5kW Compact Variable Frequency Drive - INOSAKI
SKU: Siemens-6SL3210-1KE21-3AF1
Price: 497.64 USD
Availability: InStock

Technical Overview

Compact 5.5kW frequency inverter with 380-480V 3AC input, IP20, PROFINET/EtherNet/IP, and integrated Class A EMC filter for precise motor control and safety.

Key Features

Offers sensorless vector control and multiple V/f modes (linear, square-law, FCC, ECO) without requiring an external encoder.
Includes an integrated Class A EMC filter, eliminating the need for a separate line filter in most installations.
Supports motor temperature monitoring via PTC, KTY, or Thermo-Click sensor input with an accuracy of ±5°C.
Equipped with a fail-safe digital input that enables safety-rated stop functions without an external safety relay.
Integrated PROFINET and EtherNet/IP communication for seamless network integration.
Suitable for a wide range of three-phase AC motor applications.
Operates reliably across a broad temperature range of -10 to 40°C.
Incorporates a Safe Torque Off (STO) feature for enhanced operational safety.

Technical Specification Matrix

Parameter	Value
Manufacturer	Siemens
Part Number	6SL3210-1KE21-3AF1
Product Line	SINAMICS G120C
Input Phases	3 AC
Input Line Voltage	380-480 V (+10% / -20%)
Input Line Frequency	47-63 Hz
Input Rated Current (Low Overload, LO)	16.5 A
Input Rated Current (High Overload, HO)	12.8 A
Output Phases	3 AC
Rated Output Power (LO)	5.5 kW / 7.5 hp
Rated Output Power (HO)	4.0 kW / 5.0 hp
Rated Output Current (LO)	12.5 A
Rated Output Current (HO)	8.8 A
Rated Current IN	13.0 A
Max. Output Current	17.6 A
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Pulse Frequency	4 kHz
Communication	PROFINET, EtherNet/IP
Standard Digital Inputs	6
Fail-Safe Digital Inputs	1
Digital Outputs (Relay Changeover Contact)	1 (DC 30 V, 0.5 A)
Digital Outputs (Transistor)	1 (DC 30 V, 0.5 A)
Analog Inputs	1 (Differential, 10-bit resolution)
Analog Outputs	1 (Non-isolated)
PTC/KTY Interface	1 motor temperature sensor input
Integrated EMC Filter	Class A
Efficiency	0.97
Power Loss	173 W
Degree of Protection	IP20 / UL open type
Frame Size	FSB
Operating Temperature	-10 to 40°C
Power Factor λ	0.70 - 0.85
Offset Factor cos φ	0.95
Sound Pressure Level (1m)	63 dB
Standards	CE, cUL, UL, KC, EAC, C-Tick (RCM)
Physical Weight (kg)	3
Dimensions L x W x H (cm)	26 x 25.5 x 12.5

Industrial Applications

1. Variable Speed Control for Industrial Pumps in Water Treatment

The Siemens SINAMICS G120C inverter precisely controls the speed of three-phase AC motors driving pumps in water treatment facilities, allowing for optimized flow rates and significant energy savings based on real-time demand.

Problem Solved

This solution prevents energy waste associated with oversized pumps running at full speed, reduces mechanical stress on piping systems, and enables precise process control critical for water filtration and distribution. Its 380-480V input and 5.5kW output capacity are ideal for common industrial pump sizes, while variable frequency control ensures energy-efficient operation.

Variable Frequency DrivePump ControlWater TreatmentEnergy Efficiency3-Phase AC Motor380-480V5.5kW

2. HVAC Fan Speed Regulation in Commercial Buildings

The inverter enables energy-efficient and precise control of ventilation and air conditioning fans within commercial HVAC systems, dynamically adjusting airflow to maintain optimal building climate conditions and improve indoor air quality.

Problem Solved

By matching fan speed to ventilation requirements, this solution minimizes energy consumption, significantly reduces noise levels, and extends the lifespan of fan motors by operating them at their most efficient points. The 380-480V input, V/f control modes, and integrated Class A EMC filter ensure compatibility and reliable performance in demanding building environments.

HVACFan ControlEnergy SavingsVariable Air Volume (VAV)Building AutomationV/f ControlEMC Filter

3. Conveyor System Motor Control with Integrated Safety

Provides robust and precise speed control for motors in industrial conveyor systems, ensuring smooth material handling and integrating crucial safety shutdown functions for operational security in manufacturing and logistics.

Problem Solved

This application eliminates mechanical shocks and wear on conveyor components caused by abrupt starts and stops, enables precise positioning or speed synchronization for different conveyor segments, and allows for rapid, safe motor shutdown in emergencies via the fail-safe digital input, while handling high overload conditions typical of material handling operations.

Conveyor SystemsMaterial HandlingMotor ControlSafe Torque Off (STO)Overload CapabilityIndustrial AutomationDigital Inputs