APC AP4452A NetShelter Automatic Transfer Switch 120V 20A

APC NetShelter ATS 120V 20A

The APC NetShelter Automatic Transfer Switch AP4452A provides redundant power protection for single-corded network equipment in 120V environments. It accepts one L5-20 input and distributes power through ten 5-20R outlets. This unit suits server rooms and wiring closets where continuous uptime is required for switches, routers or security appliances.

Sustained load behaviour

Under continuous operation the switch monitors the primary source and transfers to the secondary source automatically if voltage deviates outside acceptable limits. The transfer occurs without interruption to connected loads, maintaining power to all ten outlets during extended outages or source instability. Internal relay design supports the full 20A rating across the outlet bank for the duration of the event.

Pre-installation checks

Verify that your rack has space for the included mounting brackets and that the upstream circuit can deliver 120V at 20A with an L5-20 connector. Confirm that each device plug matches the 5-20R outlet style and that total connected draw stays within the 20A limit. Ensure the serial configuration cable can reach your management station for initial setup.