Cisco power supplies are a dependable and effective electronic component that transforms electrical energy from a source into the precise voltage, current, and frequency needed to power electronic components. PS-2421-1-LF Cisco 400 Watts 100-240V Power Supply for Nexus 2000 Series Fabric Extender provides excellent regulation, low output noise, and a variety of features and advantages to meet the needs of various applications. These power supplies provide dependable performance over time because of their robust and lasting construction, making them a crucial part of any electronic system.