The VFD004EL43A is a model of Delta frequency converter, also known as an inverter. It is part of Delta's VFD-E series of compact vector control drives designed for small and medium-sized machinery. 

Here are some key specifications of the VFD004EL43A:

- Power Rating: 0.4 kW (0.5 HP)

- Input Voltage: Single-phase 200-240V AC

- Output Voltage: Three-phase 0-240V AC

- Output Frequency: 0-400 Hz

- Control Method: V/F control, sensorless vector control

- Overload Endurance: 150% of rated current for 1 minute

- Communications: Built-in RS-485, supports Modbus protocol

- Protection Features: Overvoltage, undervoltage, overcurrent, phase loss, overload, stall prevention, and electronic thermal relay protection