Sinamics G120: A Flexible and Scalable Drive Solution for Modern Industry

The Sinamics G120 is a highly versatile, modular frequency inverter from Siemens, designed to meet the speed and torque control demands of a wide range of industrial applications. Whether you’re running a conveyor, pump, fan, or compressor, the Sinamics G120 drive provides the precision, energy efficiency, and safety features needed in today's automated environments.

If you're planning an upgrade, integrating into an OEM system, or simply comparing specifications and costs using the Sinamics G120 price list, this guide will help you understand the core features, benefits, and available options in the G120 family.

What Is the Sinamics G120?

The Sinamics G120 is part of Siemens' Sinamics drive family, engineered for variable-speed control of three-phase motors. What makes it stand out is its modular design, which separates the Control Unit (CU) from the Power Module (PM) — allowing easy adaptation, upgrades, and maintenance.

Key features:

Power range from 0.55 kW to 250 kW (0.75 HP to 400 HP)

Voltage classes: 230V (single-phase) and 400V (three-phase)

Modular structure: separate CU and PM

Integrated safety functions (e.g., Safe Torque Off, Safe Stop 1)

Support for communication protocols: PROFINET, PROFIBUS, EtherNet/IP, USS

Energy-efficient motor control with regenerative braking and ECO mode

Key Benefits of the Sinamics G120 Drive

✅ Modular system architecture – Swap control units or power modules independently
✅ Energy efficiency – Up to 60% energy savings via V/f and vector control
✅ Comprehensive safety – Integrated STO (SIL 2/3), optional Safe Limited Speed and more
✅ Built-in diagnostics – Faster commissioning and easier fault tracking
✅ Seamless integration – Fully compatible with Siemens TIA Portal and automation systems
✅ Flexible cooling options – Internal, push-through, and cold plate mounting

Applications of the G120 Drive

The Sinamics G120 drive is used in a wide range of industries:

Thanks to its modularity, the G120 can be tailored for anything from standard speed control to safety-critical, high-performance systems.

Sinamics G120 System Components

The G120 system consists of:

1. Power Module (PM)

Handles motor voltage and current

Sizes PM240, PM240-2, and PM250 available

Optional braking units and regenerative modules

2. Control Unit (CU)

Handles logic, communication, and motor control

Options include CU240E-2, CU250S-2 (standard) and CU250S-2 PN (with PROFINET)

3. Operator Panel (IOP or BOP-2)

Human-machine interface for parameterization and diagnostics

Optional, useful for commissioning and service

Each unit can be replaced independently, which lowers maintenance costs and increases flexibility.

Sinamics G120 Price List (Estimated USD Range)

Pricing for the G120 varies depending on the power rating, type of Power Module, Control Unit, and optional accessories. Here's a general Sinamics G120 price list range by component:

Full drive package (PM + CU + IOP/BOP):

Small systems (up to 7.5 kW): $800 – $1,500

Medium systems (7.5 – 22 kW): $1,800 – $3,000

High-power systems (30 – 90 kW+): $3,500 – $6,500+

Prices vary by region, supplier, and availability. Bulk purchases or OEM deals can offer 10–30% discounts.

How to Buy Sinamics G120

When purchasing, always verify:

Power rating and voltage compatibility

Required safety functions (STO, SS1, etc.)

Protocol support (PROFINET, PROFIBUS, etc.)

Mounting and cooling type

Firmware version (for TIA Portal integration)

Sinamics G120 FAQs

Q1: Is the G120 suitable for regenerative energy applications?

A: Yes — the PM250 module offers regenerative feedback capabilities, ideal for applications with frequent braking (e.g., elevators).

Q2: Can I replace just the Control Unit or Power Module?

A: Yes. One of the G120's advantages is its modular design — you can replace parts individually without needing a full drive replacement.

Q3: Is the G120 compatible with Siemens PLCs?

A: Absolutely. It integrates seamlessly with Siemens SIMATIC S7-1200, S7-1500, and TIA Portal.

Q4: How does the G120 compare to the G120C?

A: The G120C is a compact, non-modular version of the G120. It’s cheaper and simpler but lacks the flexibility and expandability of the full G120 system.

Q5: What’s the warranty on a Sinamics G120 drive?

A: Siemens typically offers a 12- to 24-month warranty, depending on the supplier and region.

The Sinamics G120 drive delivers a powerful combination of flexibility, safety, and energy efficiency — making it a reliable choice for automation systems of all sizes. From modular design to wide protocol support and advanced diagnostics, the G120 gives engineers and operators full control with minimal complexity.

Whether you’re searching for G120 for sale, building out a drive cabinet, or comparing against other options, make sure to check the latest Sinamics G120 price list based on your power and control requirements.