Danfoss 137U3255 iC7-Automation frequency converter, an air-cooled three phase AC drive with 380-500 V AC input, 658 A output, 355 kW power rating, PROFINET RT connectivity and integrated STO safety.
£28,224.00
The Danfoss 137U3255 is a high-capacity iC7-Automation frequency converter designed for precise and reliable control of three-phase AC motors in demanding industrial automation and process applications. As part of the advanced Danfoss iC7-Automation drive series, it delivers powerful motor control, flexible connectivity and dependable performance for large-scale machinery and industrial systems.
This air-cooled frequency converter is engineered for installations where robust drive performance, functional safety and automation network integration are essential. Its IP20/Open Type construction is suitable for cabinet installation, while the integrated control panel, standard I/O and communication options support straightforward integration into modern control systems.
With a three-phase 380–500 V AC supply, 658 A rated output current, 355 kW / 500 hp power rating, PROFINET RT fieldbus support and integrated Safe Torque Off (STO), the Danfoss 137U3255 provides efficient, network-ready motor control for demanding industrial environments.
Frequency converters such as the Danfoss 137U3255 regulate motor speed and torque by adjusting the frequency and voltage supplied to the motor. This enables improved process control, reduced mechanical stress and better energy performance across demanding industrial systems.
The iC7-Automation platform is designed for applications where reliable drive performance, industrial communication and functional safety are essential. With PROFINET RT connectivity and integrated I/O, the Danfoss 137U3255 can be incorporated into PLC-based automation systems and advanced control networks.
| Power | 355 kW |
|---|---|
| Current | 658 A |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | iC7-Automation |
| Catalogue number | 7FC-AUFA3N05-658AE20F2-000143419 |
| Model code | IC7-60FA3N05-658AE20F2+AGCX+AJFX+BAPR+BDBA+BEF1+BF20+DAAU |
| Product type | Frequency converter / AC drive |
| Cooling method | Air-cooled |
| Input voltage | 380–500 V AC |
| Input phases | 3-phase |
| Rated output current | 658 A |
| Power rating | 355 kW / 500 hp |
| Protection rating | IP20 / Open Type |
| Frame size | FA11 |
| EMC category | C2 |
| Control panel | Control Panel 2.8 OPX20 |
| Standard I/O | 4 x DI, 2 x DI/O, 2 x AI, 1 x AO, 2 x RO |
| Fieldbus protocol | PROFINET RT OS7PR |
| Other protocol | Ethernet port, no protocol |
| Functional safety | Safe Torque Off (STO), not upgradable |
| Interface board | MicroSD card reader and RTC |
| Gross weight | approx. 252.41 kg |
| Net weight | approx. 196.3 kg |
| Mounting type | Cabinet / panel mounting |
| EMC Filter | Commercial |
The Danfoss 137U3255 is used to control the speed and torque of three-phase AC motors in industrial automation, machinery and process control applications.
The drive operates from a three-phase 380–500 V AC supply.
The Danfoss 137U3255 has a rated output current of 658 A.
The Danfoss 137U3255 has a power rating of approximately 355 kW / 500 hp.
Yes, the drive includes PROFINET RT fieldbus protocol support for industrial automation network integration.
Yes, it includes integrated Safe Torque Off (STO) functionality.
Danfoss iC7-Automation frequency converters are trusted by engineers, machine builders and industrial operators for reliable motor control, efficient performance and seamless integration into demanding automation environments.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...