The HP J9581A, also known as the HPE X311, is a compact and efficient power supply unit designed to convert AC power from 100-240 volts to 12 volts DC, with a power capacity of 400 watts. It is specifically developed for various HPE networking devices and accessories, ensuring stable and reliable power delivery to support complex network configurations and operations. The X311 power supply features a wide input voltage range to accommodate global power standards, making it suitable for a variety of geographical locations and ensuring constant connectivity. Its efficiency promotes reduced energy consumption and lowers operational costs, while its small form factor allows for seamless integration into existing network setups without occupying excessive space. Designed with enterprise-level quality, the HPE X311 power supply is an essential component for maintaining an optimal operational environment in data centers and networking closets. Suitable for select HPE switches and networking hardware, it provides a dependable power solution for critical network infrastructure, facilitating uninterrupted network performance and supporting business continuity.