Danfoss 137U5721 iC7-Automation frequency converter, an air-cooled industrial variable frequency drive with 2.4 A output current, 380-500 V AC three-phase supply, IP20 protection, PROFINET RT and integrated functional safety.
£817.60
The Danfoss 137U5721 is a compact iC7-Automation frequency converter designed for precise control of small three-phase AC motors in industrial automation systems. As part of the advanced Danfoss iC7-Automation drive series, it delivers reliable motor regulation, flexible communication and integrated functional safety for modern machinery and control cabinet installations.
This air-cooled variable frequency drive is built for applications requiring efficient motor control, fast automation communication and dependable panel-mounted performance. With PROFINET RT connectivity, standard I/O and functional safety features including STO and SS1-t, the Danfoss 137U5721 is well suited for machine builders, system integrators and industrial automation engineers.
With a rated output current of 2.4 A and operation from a three-phase 380-500 V AC supply, the Danfoss 137U5721 is ideal for compact motor control applications such as small pumps, fans, conveyors, positioning systems and OEM machinery.
Frequency converters such as the Danfoss 137U5721 regulate motor speed by adjusting the voltage and frequency supplied to the motor. This helps improve process control, reduce energy consumption and minimise mechanical stress on motors and driven equipment.
The iC7-Automation platform is developed for engineers and machine builders who need compact drive technology with reliable communication, integrated safety and flexible configuration options for demanding production environments.
| Power | 0.75 kW |
|---|---|
| Current | 2.4 A |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | iC7-Automation |
| Part number | 137U5721 |
| Catalogue number | 7FC-AUFA3N05-02A4E20F2-000146355 |
| Model code | IC7-60FA3N05-02A4E20F2+ACBC+ALDC+BAPR+BDBA+BEF2+BF20+CBX0+DAAU |
| Product type | Frequency converter / variable frequency drive |
| Cooling method | Air-cooled |
| Rated output current | 2.4 A |
| Input voltage | 380-500 V AC |
| Input phases | 3-phase |
| Protection rating | IP20 / Open Type |
| Frame size | FA02b |
| EMC category | C2 |
| Control panel | 2.8 OPX20 |
| Standard I/O | 4x DI, 2x DI/O, 2x AI, 1x AO, 2x RO |
| Fieldbus protocol | PROFINET RT OS7PRO |
| Connectivity | Ethernet port, no additional protocol |
| Functional safety | STO, SS1-t, fieldbus |
| EMC Filter | Commercial |
The Danfoss 137U5721 is used to control the speed and torque of small three-phase AC motors in industrial automation, machinery and process control applications.
The drive has a rated output current of 2.4 A, making it suitable for compact motor control applications.
The Danfoss 137U5721 operates from a three-phase 380-500 V AC supply.
Yes, the drive has PROFINET RT OS7PRO fieldbus protocol enabled, along with Ethernet port connectivity.
The drive includes Safe Torque Off (STO), SS1-t and fieldbus safety functionality for safer machine operation.
Danfoss iC7-Automation frequency converters are used in demanding industrial environments where reliable motor control, energy efficiency and seamless automation integration are essential.
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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...