The Shihlin SL3-021-0.4K is a compact and high-performance AC motor drive from the SL3 series, designed for controlling the speed of 0.4kW (0.5HP) three-phase induction motors. This versatile inverter operates on a single-phase 220V input, making it an ideal solution for a wide range of applications where three-phase power is not available. It features advanced control modes, including V/F and general magnetic flux vector control, to ensure precise and efficient motor performance. With a built-in RS-485 communication interface (MODBUS), the SL3-021-0.4K can be easily integrated into larger automation systems. Its compact, DIN rail-mountable design saves panel space and simplifies installation, making it a cost-effective choice for fans, pumps, conveyors, and other small-scale machinery.