Danfoss 135X4975 VLT HVAC Drive FC-102, a 4.0 kW three phase AC variable frequency drive with IP55 / Type 12 protection, RFI filtering and MCB-109 I/O with RTC back-up for HVAC fan, pump and compressor control.
£1,135.20
The Danfoss 135X4975 is a compact and energy-efficient AC variable frequency drive (VFD) from the Danfoss VLT® HVAC Drive FC-102 series, designed for dependable motor speed control in heating, ventilation, air conditioning and refrigeration systems. Built for commercial and industrial HVAC applications, it helps optimise fan, pump and compressor performance while supporting lower energy consumption.
As part of the Danfoss FC-102 HVAC drive range, this unit combines dedicated HVAC functionality with robust power electronics and flexible configuration options. It is designed to improve system efficiency by matching motor output to actual demand, reducing unnecessary energy use, mechanical wear and operational costs.
With a rated output power of 4.0 kW / 5.0 HP and a three-phase 380–480 V AC supply, the Danfoss 135X4975 is ideal for small to medium HVAC motor applications. Its IP55 / Type 12 backplate enclosure offers protected installation, while the MCB-109 I/O with RTC back-up option provides enhanced control and monitoring functionality.
Variable frequency drives such as the Danfoss VLT® HVAC Drive FC-102 regulate motor speed by adjusting output frequency and voltage. This allows HVAC equipment to operate in line with real system demand, improving efficiency while reducing unnecessary energy use and mechanical stress.
The Danfoss 135X4975 is suited to building services and industrial HVAC applications where accurate fan, pump and compressor control is required. Its HVAC-specific functions, protected enclosure and integrated I/O option make it a dependable choice for modern automation and climate control systems.
| Power | 4 kW |
|---|---|
| Voltage | 480 V |
| Phase | Three Phase |
| IP Rating | IP55 |
| Series | VLT® HVAC Drive FC-102 |
| Full model code | FC-102P4K0T4P55H2XGXXOXSXXXXAXB0CXXXXDX |
| Product type | AC variable frequency drive |
| Rated output power | 4.0 kW / 5.0 HP |
| Output current | 8.2 A |
| Input voltage | 380–480 V AC |
| Input phases | 3-phase |
| Application range | HVAC, ventilation, heating and refrigeration |
| Protection rating | IP55 / Type 12 |
| Frame size | A5 |
| RFI filter | Included |
| Brake chopper | No |
| Control panel | Graphical Local Control Panel |
| PCB coating | Not coated |
| Mains option | No mains option |
| A option | No A option |
| B option | MCB-109 I/O, RTC back-up |
| C1 option | No C1 option |
| D option | No D option |
| Software | Latest release standard software |
The Danfoss 135X4975 is used to control the speed and torque of AC motors in HVAC systems, including fans, pumps, compressors and ventilation equipment.
This drive is rated for motors with an output power of approximately 4.0 kW / 5.0 HP.
The 135X4975 operates from a three-phase 380–480 V AC supply.
The drive has an IP55 / Type 12 enclosure, helping protect it in suitable industrial and building services installation environments.
Yes, this configuration includes MCB-109 I/O with RTC back-up for enhanced control and monitoring functionality.
Danfoss VLT® HVAC Drives are widely used by building services engineers, facilities teams and automation professionals to deliver efficient motor control, reduced energy consumption and dependable HVAC performance.
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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...