Siemens SINAMICS G120C 37kW 3AC 380-480V Frequency Converter

Technical Overview

37kW (40HP) 3AC 380-480V compact frequency converter with IP20, integrated STO, PROFINET/EtherNet/IP. Ideal for precise motor control and energy efficiency.

Key Features

Compact design for space-saving installation in control cabinets.
Rated output power of 37.0 kW (40.0 hp) for low overload applications.
Supports PROFINET and EtherNet/IP communication protocols for flexible integration.
Easy commissioning and operation with optional operator panels or SD card.
High efficiency (η = 0.98) for energy-saving operation.
Supports V/f and sensorless vector control for precise motor regulation.
Overload capability of 150% base load current for 3s (LO).
IP20 degree of protection, suitable for control cabinet mounting.
Unfiltered integrated filter class.

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
Input Rated Current (LO)	64.00 A
Input Rated Current (HO)	61.00 A
Output Number of Phases	3 AC
Output Rated Voltage	400V IEC, 480V NEC
Output Rated Power (LO)	37.00 kW (40.00 hp)
Output Rated Power (HO)	30.00 kW (30.00 hp)
Output Rated Current (LO)	68.00 A
Output Rated Current (HO)	58.00 A
Max. Output Current	116.00 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0 ... 240 Hz
Output Frequency (V/f Control)	0 ... 550 Hz
Overload Capability (LO)	150 % base load current IL for 3 s, followed by 110 % base load current IL for 57 s in a 300 s cycle time.
Overload Capability (HO)	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
Offset Factor cos φ	0.99
Efficiency η	0.98
Sound Pressure Level (1m)	72 dB
Power Loss	1,080.0 W
Filter Class (Integrated)	Unfiltered
Communication Interfaces	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 / Digital Inputs	1 (Differential input, 10 bit resolution)
Analog Outputs	1 (Non-isolated output)
IP Rating	IP20
Frame Size	FSD
Safety Function	Safe Torque Off (STO) integrated
Physical Weight (kg)	18
Dimensions L x W x H (cm)	49.5 x 35.6 x 30

Industrial Applications

1. Conveyor Belt Systems with Emergency Stop

This converter is suitable for controlling 37 kW motors in industrial conveyor systems, offering precise speed and torque control for material handling. The integrated Safe Torque Off (STO) function provides a crucial safety mechanism, immediately cutting motor power in emergencies to prevent injuries or equipment damage, meeting safety standards without complex external components.

Problem Solved

Ensures safe and controlled stopping of heavy conveyor belts during faults or emergency situations, protecting personnel and machinery by quickly removing torque from the motor.

37 kW motor control380-480 V 3ACSafe Torque Off (STO)IP20PROFINET

2. Industrial Pump Control with Network Integration

The 37 kW output power and 380-480V input make this drive ideal for regulating the speed of large industrial pumps, optimizing flow rates and energy consumption. Its PROFINET/EtherNet/IP communication capability allows for seamless integration into plant-wide control systems, enabling remote monitoring and precise adjustment of pump operation, enhancing efficiency and process control.

Problem Solved

Provides efficient and digitally controllable speed regulation for pumps, reducing energy waste and allowing for easy integration into modern industrial automation networks for remote management and data acquisition.

37 kW pump controlVariable Speed DrivePROFINETEtherNet/IPEnergy Efficiency

3. Mixers and Agitators in Controlled Environments

With its 37 kW power rating and sensorless vector control capability, this converter can precisely manage the speed and torque of industrial mixers and agitators, crucial for consistent product quality in manufacturing. The IP20 rating is suitable for installation within protected control cabinets, while the high efficiency (0.98) minimizes energy losses during continuous operation.

Problem Solved

Achieves precise and energy-efficient speed control for mixing processes, preventing material damage or inconsistent blends. The robust design and high efficiency ensure reliable performance in industrial settings when cabinet mounted.

37 kW motorVector ControlIP20 enclosureHigh EfficiencyTorque Control