Danfoss 135U8251 VLT HVAC Drive FC-102, a 7.5 kW three-phase AC variable frequency drive designed for HVAC motor control, building automation and energy-efficient pump, fan and compressor operation.
£1,657.60
The Danfoss 135U8251 is a high-performance AC variable frequency drive (VFD) from the Danfoss VLT® HVAC Drive FC-102 series, designed for efficient motor control in heating, ventilation and air conditioning applications. Built for demanding commercial and industrial environments, it provides reliable speed regulation for pumps, fans, compressors and air handling equipment.
This drive offers dedicated HVAC functionality, helping reduce energy consumption, improve system performance and minimise mechanical wear. The FC-102 range is widely used in building automation and plant room applications thanks to its intelligent control features, robust design and flexible communication options.
With a rated output power of 7.5 kW and a three-phase 380-480 V AC supply, the Danfoss 135U8251 is suitable for medium to larger HVAC motor applications. Its IP55 / Type 12 enclosure provides enhanced protection for demanding installation environments.
Variable frequency drives such as the Danfoss FC-102 regulate motor speed by adjusting output voltage and frequency. This allows HVAC systems to match motor output to actual demand, improving energy efficiency while reducing mechanical stress on motors, pumps, fans and connected equipment.
The Danfoss VLT® HVAC Drive FC-102 series is engineered for building services applications. Its HVAC-focused control functions, graphical interface and BACnet/IP connectivity make it suitable for building management systems, plant rooms and energy-saving retrofit projects.
| Power | 7.5 kW |
|---|---|
| Voltage | 480 V |
| Phase | Three Phase |
| IP Rating | IP55 |
| Series | VLT® HVAC Drive FC-102 |
| Part number | 135U8251 |
| Product type | AC variable frequency drive |
| Rated output power | 7.5 kW |
| Horsepower rating | 10 HP |
| Input voltage | 380-480 V AC |
| Input phases | 3-phase |
| Frequency | 50 / 60 Hz |
| Protection rating | IP55 / Type 12 |
| Frame size | A5 |
| RFI filter | Integrated |
| Brake chopper | Not included |
| Control panel | Graphical Local Control Panel |
| PCB coating | Not coated |
| Cable entry | Metric thread |
| Mains disconnect | Included |
| Dimensions (H × W × D) | approx. 420 × 242 × 200 mm |
| Weight | approx. 12.26 kg |
| EAN | 5710108345211 |
This drive is used to control three-phase AC motors in HVAC applications such as fans, pumps, compressors, air handling units and building services systems.
The Danfoss 135U8251 supports motors with a rated output power of approximately 7.5 kW.
The drive operates from a three-phase 380-480 V AC supply.
Yes. The Danfoss 135U8251 includes the MCA 125 BACnet/IP communication option for integration with building automation and BMS platforms.
Yes. The drive has an IP55 / Type 12 enclosure, providing enhanced protection for HVAC plant rooms and industrial building services installations.
Danfoss VLT® HVAC drives are widely used by facilities engineers, HVAC contractors and building automation specialists to deliver reliable motor control, improved energy efficiency and dependable operation in modern building services.
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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...