The HELI ESU 1 UP speed controller from Helios is an electronic accessory specifically designed for the stepless speed control of alternating current fans. Utilizing the phase-cut principle, this speed controller allows for precise adjustment of fan speed, leading to improved energy efficiency and a more comfortable indoor climate. The speed controller features an adjustable potentiometer that regulates the minimum output voltage and includes a built-in on/off switch for user-friendly operation. The unregulated switching output and overload protection via a fine fuse ensure additional safety and reliability during operation. With an IP33 protection rating, the speed controller is suitable for installation in a 55mm flush-mounted box and offers an appealing front and knob design made of white plastic.

• Stepless speed control for alternating current fans
• Adjustable minimum output voltage via potentiometer
• Integrated on/off switch for easy operation
• Overload protection via fine fuse.