APC AP4431A – Rack ATS 30A 208V

Overview

The APC AP4431A is a 2U rack‑mount Automatic Transfer Switch (ATS) used to provide redundant AC power feeds to single‑powered IT equipment. It is typically deployed by data center and network engineers to maintain continuous operation during upstream power source transitions.

This ATS is rated for 30 A at 208 V AC single phase, with a 4,992 VA load capacity and dual NEMA L6‑30P inlet connections. Output is provided via a single NEMA L6‑30R outlet, allowing connection of critical devices that require seamless input switching.

Mechanically, the AP4431A occupies 2U of standard 19″ rack space and includes mounting hardware and rack brackets. Remote monitoring and control are supported via integrated management interfaces for status tracking and event logging.

Practical deployment examples include feeding a single-supply network core switch or router from two UPS sources in a rack, or supporting critical edge compute devices where dual mains feeds are available.

This device is not suitable for multi-load distribution without additional PDUs or for three-phase systems requiring phase-to-phase switching.

Key Features

• 2U rack‑mount automatic transfer switch, 30 A, 208 V

• Dual NEMA L6‑30P inlets for redundant AC sources

• Single NEMA L6‑30R output for connected load

• Transfer time < 10 ms between active sources

• Integrated network management interface for remote control