Based on this product's specifications, here are some alternatives and similar models
Power Supply Unit DELL 450-ALEE 1400 W 2U Active Cooling
Summary description:
The DELL 450-ALEE is a 1400 W power supply unit designed for servers. It features an AC input voltage range of 100 - 240 V and an input frequency of 50 - 60 Hz. The 2U form factor and active cooling ensure efficient performance and reliability in demanding environments.