Danfoss 135X3983 VLT HVAC Drive FC-102, a 37 kW three phase AC variable frequency drive with IP66 / NEMA 4X protection designed for HVAC fan, pump and compressor control.
£4,658.40
The Danfoss 135X3983 is a powerful and dependable AC variable frequency drive (VFD) from the Danfoss VLT® HVAC Drive FC-102 series, designed for efficient motor control in heating, ventilation, air conditioning and refrigeration systems. Built for demanding commercial and industrial environments, it provides precise speed control for large fans, pumps and HVAC process equipment.
As part of the advanced FC-102 HVAC drive range, this unit combines Danfoss' dedicated HVAC intelligence with robust power electronics and flexible control options. It helps optimise system performance, reduce energy consumption and improve reliability by matching motor speed to real-time demand.
With a rated output power of 37 kW / 50 HP and a three-phase 380–480 V AC supply, the Danfoss 135X3983 is ideal for high-power HVAC motor applications. Its IP66 / NEMA 4X enclosure provides strong protection against dust and water ingress, making it suitable for demanding installation environments.
Variable frequency drives such as the Danfoss VLT® HVAC Drive FC-102 regulate motor speed by adjusting output frequency and voltage. This enables HVAC equipment to operate only as fast as required, reducing energy waste, lowering mechanical stress and improving system stability.
The Danfoss 135X3983 is particularly suited to larger building services and industrial HVAC installations where dependable high-power motor control is essential. Its rugged enclosure, built-in filtering and HVAC-specific software make it a strong choice for applications requiring long-term reliability and efficient operation.
| Power | 37 kW |
|---|---|
| Voltage | 480 V |
| Phase | Three Phase |
| IP Rating | IP66 |
| Series | VLT® HVAC Drive FC-102 |
| Full model code | FC-102P37KT4E66H3XGX1XXSXXXXAXB0CXXXXDX |
| Product type | AC variable frequency drive |
| Rated output power | 37 kW / 50 HP |
| Input voltage | 380–480 V AC |
| Input phases | 3-phase |
| Application range | HVAC, ventilation, heating and refrigeration |
| Protection rating | IP66 / NEMA 4X |
| Frame size | C1 |
| RFI filter | Class A1/B (C1) |
| Brake chopper | No |
| Control panel | Graphical Local Control Panel |
| PCB coating | Not coated |
| Mains disconnect | Included |
| B option | MCB-109 I/O, RTC back-up |
| Dimensions (H × W × D) | approx. 685 × 308 × 311 mm |
| Weight | approx. 41.09 kg |
| EAN | 5710108402815 |
| EMC Filter | Commercial |
The Danfoss 135X3983 is used to control AC motor speed and torque in HVAC systems, including large fans, pumps, compressors and ventilation equipment.
This drive is rated for motors with an output power of approximately 37 kW / 50 HP.
The 135X3983 operates from a three-phase 380–480 V AC supply.
The drive has an IP66 / NEMA 4X enclosure, offering strong protection against dust and water ingress in suitable installation environments.
Yes, this configuration includes a mains disconnect for convenient local isolation and maintenance support.
Danfoss VLT® HVAC Drives are widely used by building services engineers, facilities teams and automation professionals to deliver efficient high-power motor control, reduced energy consumption and dependable HVAC performance.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...