Maintain power continuity for supported switch deployments with a PSU sized for the demands of the 4120 platform. This 1,200 W AC power supply is specified for use with 4120 24-port and 48-port switch models, including 412024MW4Y and 412048MW4Y. For network teams standardizing on the 4120 family, the value is straightforward: match the correct power module to the chassis and preserve operational headroom for port density and attached devices. In access-layer environments, PSU selection affects more than uptime. It influences thermal behavior, serviceability, and how comfortably the switch can support real-world load conditions. This unit is positioned for infrastructure buyers who need the right-fit replacement or deployment component rather than a generic alternative. By aligning with the intended switch models, it helps reduce compatibility risk and keeps procurement tied to the exact platform requirement. For organizations maintaining production network closets, branch access stacks, or campus edge switches, that specificity matters.