Danfoss 137L4178 iC7-Automation frequency converter, an air-cooled 43 A variable frequency drive for 380-500 V AC industrial motor control with PROFINET RT communication.
£4,640.80
The Danfoss 137L4178 is a compact and advanced iC7-Automation frequency converter designed for precise AC motor control in industrial automation systems. Part of the Danfoss iC7-Automation drive series, this air-cooled variable frequency drive offers reliable speed regulation, flexible configuration and strong connectivity for modern machine and process control applications.
Engineered for demanding industrial environments, the Danfoss 137L4178 combines efficient motor control with integrated safety and automation features. Its cabinet-mounted design, standard I/O and enabled PROFINET RT communication make it well suited to OEM machinery, control panels and connected production systems.
With a 380–500 V AC supply, 43 A rating and IP20 / Open Type protection, the 137L4178 is suitable for medium-power industrial motor applications. The unit features a frame FA05b construction, EMC category C1 and C2 performance, Safe Torque Off functionality and a Control Panel 2.8 OPX20 interface.
Frequency converters such as the Danfoss iC7-Automation series regulate motor speed by adjusting output frequency and voltage. This allows machinery to operate more efficiently, improves process control and helps reduce mechanical stress on motors and driven equipment.
The Danfoss 137L4178 is designed for industrial automation systems that require dependable motor performance, network connectivity and integrated safety. Its PROFINET RT capability, standard I/O and compact IP20 format make it suitable for modern control cabinets and machine automation platforms.
| Power | 22 kW |
|---|---|
| Current | 43 A |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | iC7-Automation |
| Part number | 137L4178 |
| Catalogue number | 7FC-AUFA3N05-43A0E20F1-000122477 |
| Product type | Frequency converter / variable frequency drive |
| Cooling method | Air cooled |
| Input voltage | 380–500 V AC |
| Rated current | 43 A |
| Protection rating | IP20 / Open Type |
| Frame size | FA05b |
| EMC category | C1 and C2 |
| Control panel | 2.8 OPX20 |
| Standard I/O | 4 × DI, 2 × DI/O, 2 × AI, 1 × AO, 2 × RO |
| Fieldbus protocol | PROFINET RT OS7PRO |
| Functional safety | Safe Torque Off (STO), not upgradable |
| EMC Filter | Commercial |
The Danfoss 137L4178 is used for controlling the speed and performance of AC motors in industrial automation and machinery applications.
The 137L4178 belongs to the Danfoss iC7-Automation frequency converter series.
The Danfoss 137L4178 is designed for a 380–500 V AC supply.
This model has a rated current of 43 A, making it suitable for medium-power industrial motor control applications.
Yes, the Danfoss 137L4178 has PROFINET RT fieldbus communication enabled for industrial automation network integration.
Danfoss iC7-Automation frequency converters are trusted by engineers, OEMs and industrial users for reliable motor control, flexible connectivity and dependable performance in modern automation systems.
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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...