Siemens SINAMICS G120C 45kW Variable Frequency Drive

Technical Overview

45kW compact inverter for 380-480V 3AC systems, featuring IP20, Safe Torque Off, PROFINET, and 150% overload capacity, ideal for industrial motor control.

Key Features

Integrated Safe Torque Off (STO)
PROFINET-PN and EtherNet/IP communication capability
3-phase 380-480V AC input, 47-63 Hz
Rated output power of 45 kW (Low Overload)
IP20 / UL open type degree of protection
I/O interface: 6 Digital Inputs, 2 Digital Outputs, 1 Analog Input, 1 Analog Output
High overload capacity: 150% for 3s, followed by 110% for 57s (Low Overload)
Compact and robust design
Forced cooling AF (1 fan)

Technical Specification Matrix

Parameter	Value
Power Rating (LO)	45 kW
Input Voltage	380-480 V 3AC
Line Frequency	47-63 Hz
Rated Input Current (LO)	76.00 A
Rated Output Current (LO)	82.50 A
Rated Input Current (HO)	69.00 A
Rated Output Current (HO)	68.00 A
Overload Capability (LO)	150% for 3s, then 110% for 57s in 300s cycle
Overload Capability (HO)	200% for 3s, then 150% for 57s in 300s cycle
Degree of Protection	IP20 / UL open type
Digital Inputs	6
Digital Outputs	2
Analog Inputs	1
Analog Outputs	1
Integrated Fieldbus	PROFINET-PN, EtherNet/IP
Safety Function	Safe Torque Off (STO)
Cooling Method	Forced cooling AF (1 fan)
Output Frequency (V/f control)	0-550 Hz
Power Factor λ	0.90 - 0.95
Efficiency η	0.98
Sound Pressure Level (1m)	72 dB
Power Loss	1400 W
Physical Weight (kg)	18.8
Dimensions L x W x H (cm)	49.5 x 35.6 x 30

Industrial Applications

1. Automated Conveyor Belt Systems

This 45 kW, 380-480V 3AC drive with PROFINET communication and Safe Torque Off is perfectly suited for controlling medium to large industrial conveyor belts. Its robust design and precise motor control enable efficient material handling and ensure operational safety.

Problem Solved

Provides accurate speed and torque control for heavy loads on conveyor belts, improving material flow and enabling safe stops through integrated STO.

Variable speed drive45kW380-480VPROFINETSafe Torque OffMaterial HandlingConveyor Control

2. Pump and Fan Control in HVAC and Water Treatment

The 45 kW power rating and 380-480V 3AC input of this inverter make it ideal for regulating large pumps and fans in HVAC systems or water/wastewater treatment facilities. Its high efficiency (η 0.98) contributes to energy savings, while PROFINET enables integration into building management systems for optimized fluid and air flow.

Problem Solved

Enables energy-efficient operation and precise modulation of flow/pressure in large fluid and air movement applications, reducing energy consumption and operational costs.

Variable frequency drive45kW380-480VHVACPump ControlFan ControlEnergy EfficiencyWater Treatment

3. Industrial Machine Tool Control

This drive's 45 kW power, 380-480V 3AC compatibility, and 150% overload capacity for 3 seconds are crucial for controlling demanding industrial machine tools such as grinders or mixers. The integrated Safe Torque Off and PROFINET connectivity support modern machine automation, ensuring both performance and safety.

Problem Solved

Offers reliable motor control for machinery experiencing varying or momentary high loads, providing precise speed adjustments, quick torque response, and critical safety functions for operators.

Machine Control45kW380-480VOverload CapacityPROFINETSafe Torque OffManufacturing Automation