135N4531 Danfoss VLT HVAC Drive 250KW/350HP 380-480VAC IP54

Why Choose the Danfoss 135N4531 VLT HVAC Drive?

The Danfoss 135N4531 is a powerful and efficient AC variable frequency drive (VFD) from the Danfoss VLT® HVAC Drive FC 102 series, engineered for demanding heating, ventilation, air conditioning and refrigeration applications. Designed for high-power HVAC motor control, it helps optimise energy usage, improve process stability and reduce mechanical stress across large building services and industrial systems.

This drive combines Danfoss HVAC-specific intelligence with robust power handling and advanced filtering, making it suitable for large fans, pumps, compressors and air handling equipment. The FC 102 platform is simple to operate while offering powerful control functions that support efficient airflow, pressure and temperature regulation.

With a rated output power of 250 kW / 350 HP and a three-phase 380–480 V AC supply, the Danfoss 135N4531 is ideal for large-scale HVAC installations. Its IP54 / Type 12 enclosure with main shield, LHD-AAF006 filter, A2 RFI filter and coated PCB provide a robust configuration for demanding commercial and industrial environments.

Key Advantages

• High-power variable frequency drive for HVAC applications.
• 250 kW / 350 HP output rating for large fans, pumps and compressors.
• Three-phase 380–480 V AC input for industrial power systems.
• IP54 / Type 12 enclosure with main shield for protected installation.
• LHD-AAF006 filter with A2 RFI filtering for improved electrical performance.
• Coated PCB for enhanced durability in demanding environments.
• Graphical Local Control Panel for straightforward commissioning and operation.

Key Features

• Danfoss VLT® HVAC Drive FC 102 series.
• 250 kW / 350 HP rated motor power.
• Three-phase 380–480 V AC supply.
• IP54 / Type 12 protection rating with main shield.
• Frame size D2n.
• LHD-AAF006 filter.
• A2 RFI filter.
• Graphical Local Control Panel.
• No brake chopper.
• No A option or B option.
• Coated PCB.
• No mains option.

Technical Specifications

• Manufacturer: Danfoss
• Series: VLT® HVAC Drive FC 102
• Model: 135N4531
• Alternative model code: FC-102N250T4E5MN2XGCXXXSXXXXAXBXCXXXXDX
• Product type: AC variable frequency drive
• Rated output power: 250 kW
• Motor rating: 350 HP
• Input voltage: 380–480 V AC
• Input phases: Three phase
• Output phases: Three phase
• Frequency: 50 / 60 Hz
• Protection rating: IP54 / Type 12 with main shield
• Frame size: D2n
• Filter: LHD-AAF006 filter + A2 RFI
• Brake chopper: No
• Control panel: Graphical Local Control Panel
• A option: No A option
• B option: No B option
• C1 option: No C1 option
• D option: No D option
• PCB coating: Coated PCB
• Mains option: No mains option
• Software: Latest release standard software

High-Power HVAC Motor Control

Variable frequency drives such as the Danfoss 135N4531 regulate motor speed by adjusting output voltage and frequency. This enables large HVAC equipment to match motor output to real demand, helping reduce energy consumption, lower mechanical wear and improve overall system efficiency.

The FC 102 series is designed specifically for HVAC applications, supporting efficient control of airflow, pressure and temperature across modern building services and industrial plants. Its high-power rating and integrated filtering make this configuration suitable for demanding installations requiring dependable performance.

Typical Applications

• Large air handling units and ventilation systems.
• High-power supply and extract fans.
• Heating and cooling pumps.
• Chilled water and condenser water systems.
• Large compressors and refrigeration equipment.
• Building management and HVAC control systems.
• Commercial and industrial plant rooms.

Trusted by HVAC Professionals Worldwide

Danfoss VLT® HVAC Drives are widely used by building services engineers, facilities teams and automation specialists for reliable high-power motor control, energy-efficient operation and long-term HVAC performance.