Danfoss 137U3861 iC7-Automation frequency converter, an air-cooled three-phase AC drive with 1120 A rated current, 380-500 V AC input, IP54 / UL Type 12 enclosure and Modbus TCP connectivity.
£73,792.80
The Danfoss 137U3861 is a high-performance iC7-Automation frequency converter designed for demanding industrial motor control applications. As part of the advanced Danfoss iC7-Automation drive series, it provides reliable speed and torque control for large three-phase AC motors in automation, process and heavy-duty machinery environments.
This air-cooled frequency converter combines robust power handling with flexible automation connectivity. It is configured with an IP54 / UL Type 12 enclosure, making it suitable for industrial installations where enhanced protection against dust and splashing water is required. The drive also includes integrated safety and communication options to support modern control architectures.
With a three-phase 380–500 V AC supply and a rated current of 1120 A, the Danfoss 137U3861 is suitable for high-power motor applications requiring dependable performance, efficient energy use and precise process control.
Frequency converters such as the Danfoss 137U3861 regulate motor speed by controlling output voltage and frequency. This allows industrial motors to run more efficiently, reducing energy consumption while improving process control and mechanical performance.
The iC7-Automation range is designed for demanding industrial environments where precise motor control, flexible connectivity and high system reliability are essential. Its communication interfaces, standard I/O and integrated safety functionality make it suitable for integration into complex automation systems.
| Power | 630 kW |
|---|---|
| Current | 1120 A |
| Phase | Three Phase |
| IP Rating | IP54 |
| Series | iC7-Automation |
| SKU | 137U3861 |
| Product type | AC frequency converter |
| Cooling method | Air-cooled |
| Rated current | 1120 A |
| Input voltage | 380–500 V AC |
| Input phases | 3-phase |
| Protection rating | IP54 / UL Type 12 |
| Frame size | FB12 |
| EMC category | C2 |
| Control panel | Control Panel 2.8 OPX20 |
| Standard I/O | 4 × DI, 2 × DI/O, 2 × AI, 1 × AO, 2 × RO |
| Fieldbus protocol | Modbus TCP OS7MT |
| Other protocol option | Ethernet port, no protocol |
| Functional safety | STO, not upgradable |
| EMC Filter | Commercial |
The Danfoss 137U3861 is used to control the speed and torque of large three-phase AC motors in industrial automation, process control and heavy-duty machinery applications.
This product belongs to the Danfoss iC7-Automation frequency converter series.
The drive is designed for a three-phase 380–500 V AC supply.
The Danfoss 137U3861 has a rated current of 1120 A.
Yes, the drive includes Safe Torque Off (STO) functional safety, specified as not upgradable.
Danfoss iC7-Automation frequency converters are trusted by engineers and system integrators for reliable high-power motor control, flexible connectivity and efficient operation in demanding industrial environments.
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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...