APC NetShelter ATS 1U AP4452A 120V 20A L5-20 In | Rack ATS, Enterprise

Keep rack-mounted equipment online when one power source fails. The APC NetShelter ATS 1U is a rack automatic transfer switch designed to feed connected devices from two input sources and switch automatically when the preferred source is unavailable. That makes it a practical fit for storage, network, and server racks where uptime matters but every device cannot justify dual power supplies. With a 120 V, 20 A input and an L5-20 inlet, this unit is sized for enterprise rack deployments that need dependable source selection without consuming valuable rack space. The 1U form factor helps preserve density, while 10 NEMA 5-20R outlets provide enough distribution for a compact set of single-corded devices. For teams standardizing power at the rack level, an ATS adds a layer of resilience that cheaper power strips cannot match. It helps reduce the risk of a single upstream failure taking down attached equipment, making it a strong choice for environments where continuity, orderly cabling, and predictable power handoff are part of the design brief.