Technical Overview

Compact 3AC 380-480V frequency converter, delivering 75kW/75hp with 206A max output. Features 4kHz pulse frequency, 0-550Hz V/f control, and IP20 protection.

Key Features

3-phase AC input 380-480V (+10%-20%)
Rated output power up to 75kW (75hp) for LO
Max. output current 206.00 A
Supports V/f control (0-550 Hz) and Vector control (0-240 Hz)
Integrated Class A filter
USS/MODBUS RTU communication protocol
6 standard digital inputs (11V switching level 0->1)
1 fail-safe digital input
1 relay changeover contact digital output (DC 30V, 0.5A)
1 transistor digital output (DC 30V, 0.5A)
1 differential analog/digital input (10-bit resolution)
1 non-isolated analog output
1 motor temperature sensor input (PTC, KTY, Thermo-Click)
IP20 / UL open type degree of protection
Air cooling via integrated fan

Technical Specification Matrix

Parameter	Value
Input Number of Phases	3 AC
Input Line Voltage	380 ... 480 V +10%-20%
Input Line Frequency	47 ... 63 Hz
Output Number of Phases	3 AC
Output Rated Voltage	400V IEC / 480V NEC
Output Rated Power (LO)	75.00 kW / 75.00 hp
Output Rated Power (HO)	55.00 kW / 60.00 hp
Max. Output Current	206.00 A
Pulse Frequency	4 kHz
Output Frequency for Vector Control	0 ... 240 Hz
Output Frequency for V/f Control	0 ... 550 Hz
Low Overload (LO) Capability	150% base load current IL for 3 s, followed by 110% base load current IL for 57 s in a 300 s cycle time
High Overload (HO) Capability	200% base load current IH for 3 s, followed by 150% base load current IH for 57 s in a 300 s cycle time
Power Factor λ	0.90 ... 0.95
Efficiency η	0.99
Sound Pressure Level (1m)	68 dB
Power Loss	1,540.0 W
Integrated Filter Class	Class A
Communication Protocol	USS/MODBUS RTU
Number of Standard Digital Inputs	6
Standard Digital Input Switching Level (0→1)	11 V
Number of Fail-Safe Digital Inputs	1
Number of Digital Outputs (Relay changeover contact)	1
Digital Output (Relay Resistive Load)	DC 30 V, 0.5 A
Number of Digital Outputs (Transistor)	1
Digital Output (Transistor Resistive Load)	DC 30 V, 0.5 A
Number of Analog/Digital Inputs	1 (Differential input)
Analog/Digital Input Resolution	10 bit
Number of Analog Outputs	1 (Non-isolated output)
PTC/KTY Interface	1 motor temperature sensor input (PTC, KTY, Thermo-Click), accuracy ±5 °C
Cooling Method	Air cooling using an integrated fan
Cooling Air Requirement	0.153 m³/s
Installation Altitude	1,000 m
Operating Temperature	-20 ... 40 °C
Max. Relative Humidity (Operation)	95% RH, condensation not permitted
Signal Cable Conductor Cross-section	0.15 ... 1.50 mm² (AWG 24 ... AWG 16)
Line Side Connection Type	Screw-type terminal
Line Side Conductor Cross-section	35.00 ... 120.00 mm² (AWG 2 ... AWG -3)
Motor End Connection Type	Screw-type terminals
Motor End Conductor Cross-section	35.00 ... 120.00 mm² (AWG 2 ... AWG -3)
Max. DC Link Line Length	10 m
Max. Motor Cable Length (Shielded)	300 m
Max. Motor Cable Length (Unshielded)	450 m
Degree of Protection	IP20 / UL open type
Frame Size	FSF
Compliance with Standards	CE, CUL, UL, KC, EAC, C-Tick (RCM)
Physical Weight (kg)	64
Dimensions L x W x H (cm)	76 x 40 x 58.5

Industrial Applications

1. High-Capacity Conveyor Belt Systems

The SINAMICS G120C, with its 75kW output and 200% overload capability, provides robust and reliable speed control for heavy-duty conveyor belts in mining, logistics, or manufacturing. Its vector control capabilities ensure precise acceleration and deceleration, preventing material spillage and reducing mechanical stress.

Problem Solved

Provides stable, precise, and high-torque motor control for large conveyor systems, handling sudden load changes without faults or wear.

Vector ControlOverload Capacity75kWHeavy-Duty ConveyorsMotor Speed Control

2. Industrial Pump and Fan Systems in HVAC

Utilizing V/f control up to 550 Hz, this converter efficiently manages large industrial pumps and fans in HVAC systems, water treatment plants, or industrial ventilation. The integrated Class A filter minimizes harmonic distortion, ensuring compliance and preventing interference with other sensitive equipment.

Problem Solved

Optimizes energy consumption and provides smooth operation for large pump and fan applications, while adhering to EMC standards.

V/f ControlEnergy EfficiencyClass A FilterHVAC SystemsPump Control

3. Automated Material Handling (AS/RS)

The G120C's precise control capabilities and digital I/O integration are ideal for automated storage and retrieval systems (AS/RS) or gantry robots. Its compact frame size (FSF) and IP20 protection allow for installation in controlled industrial environments, facilitating complex motion sequences with high reliability.

Problem Solved

Enables accurate and repeatable positioning and speed control for automated material handling equipment, improving throughput and operational safety.

Automated StorageMaterial HandlingDigital I/OIP20 ProtectionPrecise Motor Control

Siemens SINAMICS G120C 75kW/75hp Frequency Converter

Siemens SINAMICS G120C 75kW/75hp Frequency Converter

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. High-Capacity Conveyor Belt Systems

2. Industrial Pump and Fan Systems in HVAC

3. Automated Material Handling (AS/RS)