The main difference between the Sinamics VFD G120 and Sinamics G120C lies in their design and application flexibility. The G120 is a modular variable frequency drive (VFD) system consisting of a separate power module and control unit, allowing users to choose and combine components based on specific application needs. This modular design provides higher flexibility, scalability, and customization, making the G120 suitable for complex automation tasks or large systems that require advanced control functions, broader power ranges, and multiple communication options.
On the other hand, the Sinamics G120C is a compact all-in-one drive where the power module and control unit are integrated into a single housing. It’s designed for simple, space-saving installations and quick commissioning — a true “plug-and-play” solution. The G120C covers a power range from 0.55 kW to 132 kW, offering key features like Safe Torque Off (STO) and support for PROFINET, PROFIBUS, and Modbus RTU communication. In short, the G120 is best for flexible and advanced applications, while the G120C focuses on compactness, simplicity, and cost efficiency for standard motor control tasks.