Siemens SINAMICS G120C Series – Compact Frequency Converter
Product Overview
The SINAMICS G120C is a cost-effective and space-saving frequency converter designed for simple speed control applications in industrial environments. It combines reliability, ease of use, and energy efficiency, making it ideal for pumps, fans, conveyors, and other basic motor-driven systems.
The SINAMICS G120C combines an extremely compact design with integrated safety function and a wide range of functions for diverse applications. With seven frame sizes, it covers a power range from 0.55 to 132 kW.
A wealth of compelling advantages
The SINAMICS G120C drive is especially compact, delivering high power density—with seven
frame sizes, it covers a range of power ratings from 0.55 kW to 132 kW (0.75 hp to 150 hp).
This versatile, compact drive, addresses a wide range of applications—e.g. conveyor belts,
mixers, agitators, extruders, pumps, fans, compressors and basic machine handling.
Strong member of the SINAMICS family
The SINAMICS G120C belongs to the SINAMICS family. It offers the ideal drive for every
application, which can be intuitively commissioned using standard tools.
Typical Applications
HVAC: Fan & pump speed control for energy savings.
Material Handling: Conveyors, lifts, and cranes.
Water & Wastewater: Pumps and mixers.
Food & Beverage: Processing and packaging machines.
Communication & Integration
Seamless integration with SIMATIC PLCs (S7-1200/S7-1500) via PROFIBUS/PROFINET.
Supports TIA Portal (Totally Integrated Automation) for simplified engineering.
Reliability & Protection
Comprehensive protection: Overcurrent, overvoltage, motor stall prevention, and thermal monitoring.
Robust design: Operates in -10°C to +50°C (derating may apply at higher temps).
Ordering & Accessories
Model example: 6SL3210-1KEXX-XXXX (varies by power rating).
Optional add-ons:
EMC filters (for compliance with electromagnetic standards).
Line reactors (for long cable applications).
Encoder modules (for closed-loop control).
Key Features
Compact & Modular Design
Power range: 0.55 kW to 132 kW (single-phase & three-phase).
Integrated Control Unit (CU), Power Module (PM), and optional Operator Panel (IOP).
Booksize and Compact mounting options for flexible cabinet installation.
High Performance & Flexibility
Supports V/f control, sensorless vector control (SLVC), and closed-loop vector control (with encoder).
High starting torque (200% in vector mode) for demanding applications.
Energy Efficiency
Automatic energy optimization for pumps and fans (ECO mode).
Compliant with IE2/IE3 motor efficiency standards, reducing power consumption.
Built-in Functions & Connectivity
Integrated brake chopper (for dynamic braking in certain models).
PLC functionality via BICO parameterization for flexible logic control.
Communication options:
Standard: PROFIBUS DP, USS, Modbus RTU.
Optional: PROFINET (via plug-in module).
Easy Commissioning & Diagnostics
Integrated Operator Panel (IOP) for quick setup and troubleshooting.
PC tools support: SINAMICS Startdrive and SIMOCOM U for parameterization.
Siemens SINAMICS G120C Series – Technical Specifications
1. General Data
| Parameter | Specification |
| Product Type | Compact Frequency Converter |
| Power Range | 0.55 kW – 132 kW |
| Input Voltage (3AC) | 380V – 480V (±10%), 50/60 Hz |
| Input Voltage (1AC) | 200V – 240V (±10%), 50/60 Hz (for ≤4 kW models) |
| Output Voltage | 0 – Input Voltage (3-phase) |
| Output Frequency | 0 – 650 Hz |
| Ambient Temperature | -10°C to +50°C (derating above +40°C) |
| Protection Class | IP20 (for cabinet mounting) |
| Cooling Method | Self-cooling (fanless for ≤7.5 kW) / Forced-air cooling (≥11 kW) |
2. Motor Control & Performance
| Parameter | Specification |
| Control Methods | – V/f control (linear, quadratic, programmable) – Sensorless Vector Control (SLVC) – Closed-loop vector control (with encoder option) |
| Starting Torque | – 150% (V/f mode) – 200% (vector mode) |
| Speed Control Range | – 1:50 (sensorless) – 1:1000 (with encoder) |
| Dynamic Response | <10 ms (torque step response in vector mode) |
| Overload Capacity | – 150% for 60s (standard) – 200% for 3s (short-term) |
3. Built-in Features
| Feature | Description |
| Integrated Brake Chopper | Included for models ≤15 kW (external resistor required) |
| PLC Functionality | Programmable via BICO technology (free function blocks) |
| PID Controller | Integrated for process control (e.g., pressure, flow regulation) |
| Protection Functions | Overcurrent, overvoltage, undervoltage, motor thermistor monitoring, ground fault detection |
4. Communication Interfaces
| Interface | Protocols |
| Standard Ports | – RS485 (USS/Modbus RTU) – PROFIBUS DP (optional via CU250S-2 control unit) |
| Optional Modules | – PROFINET (plug-in module) – CANopen (for specific models) |
| PC Tools | SINAMICS Startdrive, SIMOCOM U, TIA Portal integration |
5. Energy Efficiency & Compliance
| Parameter | Details |
| Efficiency | >97% (at full load) |
| ECO Mode | Automatic energy optimization for variable torque loads (pumps/fans) |
| Standards Compliance | – CE, UL, cUL – EMC: EN 61800-3 – RoHS, REACH |
6. Mechanical Specifications
| Frame Size (FS) | Power Range | Dimensions (W × H × D, mm) | Weight |
| FSAA | 0.55 – 2.2 kW | 73 × 173 × 155 | 1.2 kg |
| FSA | 3 – 4 kW | 73 × 196 × 203 | 2.5 kg |
| FSB | 5.5 – 7.5 kW | 100 × 196 × 203 | 5.8 kg |
| FSC | 11 – 18.5 kW | 140 × 295 × 203 | 14 kg |
| FSD | 22 – 45 kW | 200 × 472 × 237 | 35 – 120 kg |
| FSE | 55 KW | 275 × 551 × 237 | |
| FSF | 75-132 KW | 305 × 708 × 357 |
SINAMICS G120C
P LO1
(kW)
P ＨO2
(kW)
P LO1
(hp)
I LO1_out
(A)
I HO2_out5
(A)
Appearance Size
Without an internal A-class incoming line filter
G120C Order Number
Equipped with an A-class incoming line filter G120C
Order Number
0.55
0.37
0.75
1.7
1.3
FSAA
6SL3210-1KE11-8U 2
6SL3210-1KE11-8A 2
0.75
0.55
1
2.2
1.7
FSAA
6SL3210-1KE12-3U 2
6SL3210-1KE12-3A 2
1.1
0.75
1.5
3.1
2.2
FSAA
6SL3210-1KE13-2U 2
6SL3210-1KE13-2A 2
1.5
1.1
2
4.1
3.1
FSAA
6SL3210-1KE14-3U 2
6SL3210-1KE14-3A 2
2.2
1.5
3
5.6
4.1
FSAA
6SL3210-1KE15-8U 2
6SL3210-1KE15-8A 2
3
2.2
4
7.3
5.6
FSA
6SL3210-1KE17-5U 1
6SL3210-1KE17-5A 1
4
3
5
8.8
7.3
FSA
6SL3210-1KE18-8U 1
6SL3210-1KE18-8A 1
5.5
4
7.5
12.5
8.8
FSB
6SL3210-1KE21-3U 1
6SL3210-1KE21-3A 1
7.5
5.5
10
16.5
12.5
FSB
6SL3210-1KE21-7U 1
6SL3210-1KE21-7A 1
11
7.5
15
25
16.5
FSC
6SL3210-1KE22-6U 1
6SL3210-1KE22-6A 1
15
11
20
31
25
FSC
6SL3210-1KE23-2U 1
6SL3210-1KE23-2A 1
18.5
15
25
37
31
FSC
6SL3210-1KE23-8U 1
6SL3210-1KE23-8A 1
22
18.5
25
43
37
FSD
6SL3210-1KE24-4U 1
6SL3210-1KE24-4A 1
30
22
30
58
43
FSD
6SL3210-1KE26-0U 1
6SL3210-1KE26-0A 1
37
30
40
68
58
FSD
6SL3210-1KE27-0U 1
6SL3210-1KE27-0A 1
45
37
50
82.5
68
FSD
6SL3210-1KE28-4U 1
6SL3210-1KE28-4A 1
55
45
60
103
83
FSF
6SL3210-1KE31-1U 1
6SL3210-1KE31-1A 1
75
55
75
136
103
FSF
6SL3210-1KE31-4U 1
6SL3210-1KE31-4A 1
90
75
100
164
136
FSF
6SL3210-1KE31-7U 1
6SL3210-1KE31-7A 1
110
90
110
201
164
FSF
6SL3210-1KE32-1U 1
6SL3210-1KE32-1A 1
132
110
150
237
201
FSF
6SL3210-1KE32-4U 1
6SL3210-1KE32-4A 1
| P LO1 (kW) | P ＨO2 (kW) | P LO1 (hp) | I LO1_out (A) | I HO2_out5 (A) | Appearance Size | Without an internal A-class incoming line filter G120C Order Number | Equipped with an A-class incoming line filter G120C Order Number |
| 0.55 | 0.37 | 0.75 | 1.7 | 1.3 | FSAA | 6SL3210-1KE11-8U 2 | 6SL3210-1KE11-8A 2 |
| 0.75 | 0.55 | 1 | 2.2 | 1.7 | FSAA | 6SL3210-1KE12-3U 2 | 6SL3210-1KE12-3A 2 |
| 1.1 | 0.75 | 1.5 | 3.1 | 2.2 | FSAA | 6SL3210-1KE13-2U 2 | 6SL3210-1KE13-2A 2 |
| 1.5 | 1.1 | 2 | 4.1 | 3.1 | FSAA | 6SL3210-1KE14-3U 2 | 6SL3210-1KE14-3A 2 |
| 2.2 | 1.5 | 3 | 5.6 | 4.1 | FSAA | 6SL3210-1KE15-8U 2 | 6SL3210-1KE15-8A 2 |
| 3 | 2.2 | 4 | 7.3 | 5.6 | FSA | 6SL3210-1KE17-5U 1 | 6SL3210-1KE17-5A 1 |
| 4 | 3 | 5 | 8.8 | 7.3 | FSA | 6SL3210-1KE18-8U 1 | 6SL3210-1KE18-8A 1 |
| 5.5 | 4 | 7.5 | 12.5 | 8.8 | FSB | 6SL3210-1KE21-3U 1 | 6SL3210-1KE21-3A 1 |
| 7.5 | 5.5 | 10 | 16.5 | 12.5 | FSB | 6SL3210-1KE21-7U 1 | 6SL3210-1KE21-7A 1 |
| 11 | 7.5 | 15 | 25 | 16.5 | FSC | 6SL3210-1KE22-6U 1 | 6SL3210-1KE22-6A 1 |
| 15 | 11 | 20 | 31 | 25 | FSC | 6SL3210-1KE23-2U 1 | 6SL3210-1KE23-2A 1 |
| 18.5 | 15 | 25 | 37 | 31 | FSC | 6SL3210-1KE23-8U 1 | 6SL3210-1KE23-8A 1 |
| 22 | 18.5 | 25 | 43 | 37 | FSD | 6SL3210-1KE24-4U 1 | 6SL3210-1KE24-4A 1 |
| 30 | 22 | 30 | 58 | 43 | FSD | 6SL3210-1KE26-0U 1 | 6SL3210-1KE26-0A 1 |
| 37 | 30 | 40 | 68 | 58 | FSD | 6SL3210-1KE27-0U 1 | 6SL3210-1KE27-0A 1 |
| 45 | 37 | 50 | 82.5 | 68 | FSD | 6SL3210-1KE28-4U 1 | 6SL3210-1KE28-4A 1 |
| 55 | 45 | 60 | 103 | 83 | FSF | 6SL3210-1KE31-1U 1 | 6SL3210-1KE31-1A 1 |
| 75 | 55 | 75 | 136 | 103 | FSF | 6SL3210-1KE31-4U 1 | 6SL3210-1KE31-4A 1 |
| 90 | 75 | 100 | 164 | 136 | FSF | 6SL3210-1KE31-7U 1 | 6SL3210-1KE31-7A 1 |
| 110 | 90 | 110 | 201 | 164 | FSF | 6SL3210-1KE32-1U 1 | 6SL3210-1KE32-1A 1 |
| 132 | 110 | 150 | 237 | 201 | FSF | 6SL3210-1KE32-4U 1 | 6SL3210-1KE32-4A 1 |
