APC AR8122BLK Fixed Shelf 1U, 250 lbs Capacity

APC AR8122BLK 3 Phase 30A Rackmount Automatic Transfer Switch

Overview

The APC AR8122BLK is a 3-phase, 30A rack-mounted automatic transfer switch (ATS) engineered for enterprise IT and data center environments requiring uninterrupted power delivery. Facilities and IT infrastructure teams deploy this ATS to ensure critical servers, storage systems, and network devices remain powered during utility failures or maintenance events. The AR8122BLK automatically switches between two power sources, providing rapid redundancy and minimizing downtime risk for sensitive electronics.

This switch supports a nominal 208/220/240V AC three-phase input with a rated 30A per phase. Typical switchover occurs in under 8 milliseconds, ensuring continuous operation for connected loads. Input and output connections use standard hardwired terminal blocks, and the unit provides dry contact outputs for integration with monitoring systems. Front-panel LEDs indicate operational status, source selection, and fault conditions, supporting proactive maintenance and real-time monitoring.

The AR8122BLK fits standard 19-inch racks and occupies 3U of space, making it suitable for IDF closets, edge computing cabinets, and data center racks where dual-feed redundancy is required. Its compact rackmount design allows installation alongside PDUs and UPS systems without compromising cabinet density.

Integration with building management and IT monitoring systems is facilitated through dry contact signaling, enabling alerting and coordinated source switching. The ATS is compatible with APC and third-party rack-mounted PDUs, supporting dual utility feeds or utility and generator combinations in North American and international three-phase environments.

A typical deployment scenario includes a branch or remote office rack with dual incoming feeds, ensuring servers, switches, and storage equipment remain powered during utility outages. The unit automatically transfers the load to the secondary source when the primary feed is interrupted, maintaining operational continuity.

The AR8122BLK is not intended for single-phase only applications or installations exceeding 30A per phase. Facilities requiring higher amperage, modular ATS expansion, or full building-level integration should consider larger enterprise-class ATS platforms.

Key Features

• 3-phase 30A rack-mounted automatic transfer switch
• Rapid source switching (<8 ms typical) for critical equipment
• LED indicators and dry contacts for real-time monitoring
• Compatible with dual-feed UPS and PDU systems
• Standard 19-inch 3U rackmount form factor

Technical Specifications