The Danfoss 037N0066 is a three-phase by-pass motor starter designed to control and protect three-phase 0.25 kW motors up to 5.5 kW at 400 VAC. It is suitable for controlling asynchronous motors, pumps and compressors, and is designed for use with Single phase 50 Hz or 60 Hz power supplies. It features a powerful overload and thermal protection system, visual LED display of the current overload and temperature levels, manual or automatic reset, and two contactors. It also includes class IP55 protection, adjustable mounting height and interval time, and a quick reconnect system.