135X4975 Danfoss VLT HVAC Drive 4.0KW/5.5HP 380-480VAC IP55

Why Choose the Danfoss 135X4975 VLT® HVAC Drive?

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.

Key Advantages

• Dedicated HVAC variable frequency drive for fans, pumps and compressors.
• 4.0 kW / 5.0 HP motor power rating for efficient HVAC applications.
• Three-phase 380–480 V AC input suitable for industrial power systems.
• IP55 / Type 12 enclosure for protected installation environments.
• RFI filter for improved electromagnetic compatibility.
• Graphical local control panel for easy commissioning and operation.
• MCB-109 I/O with RTC back-up for enhanced control functionality.
• Energy-saving motor control helps reduce HVAC running costs.

Key Features

• Danfoss VLT® HVAC Drive FC-102 series.
• 4.0 kW / 5.0 HP rated output power.
• 8.2 A output current.
• Three-phase 380–480 V AC input supply.
• IP55 / Type 12 protection rating.
• A5 frame size.
• RFI filter.
• Graphical local control panel included.
• No brake chopper configuration.
• Not coated PCB.
• No mains option.
• MCB-109 I/O, RTC back-up.
• Latest release standard software.

Technical Specifications

• Manufacturer: Danfoss
• Series: VLT® HVAC Drive FC-102
• Model: 135X4975
• 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

Efficient Motor Control for HVAC Systems

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.

Typical Applications

• HVAC fan speed control.
• Air handling units and ventilation systems.
• Heating and cooling plant equipment.
• Commercial pump control.
• Refrigeration and compressor applications.
• Building management and automation systems.
• Industrial climate control systems.

Trusted by HVAC Engineers Worldwide

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.