Vertiv SR2N03020PAA1 3-Rack 20kW Power-Redundant IT Enclosure Row

The Vertiv SR2N03020PAA1 is a factory-configured, three-rack IT enclosure row system rated for 20 kW total capacity with integrated power redundancy — purpose-built for edge deployments, distributed data centers, and high-density compute environments where a single PDU failure cannot be an option. At 2,700 mm in assembled length, this row packs six 30 A PDUs across three 42U x 600 x 1400 mm enclosures under a 20 kW Power Management and Control (PMC) distribution architecture, giving each rack a 6.6 kW power budget from a dual-fed infrastructure. If you are sizing a row system that needs redundant power paths without adding a fire suppression module, the SR2N03020PAA1 hits that exact configuration point.

Overview

Vertiv's Vertiv rack systems and row enclosure solutions are engineered for structured, high-density deployments. The SR2N03020PAA1 belongs to the SR2 series — a family of pre-engineered IT rack enclosure rows that ship as complete, integrated systems rather than individually assembled components. The intent is fast commissioning: racks, PDUs, and power management arrive pre-configured to a validated architecture, reducing field engineering time compared to a build-from-scratch rack row.

This specific variant selects three enclosures, the 20 kW power tier, and the power-redundant (PAA) PDU layout. The absence of a fire suppression module (AA1 suffix) keeps the footprint to 2,700 mm — approximately 8 feet 10 inches — making it deployable in standard raised-floor suites and edge machine rooms without structural modification for suppression infrastructure.

Key Features

• 20 kW Total Row Capacity via 20kW PMC Distribution: The Power Management and Control distribution tier handles the full 20 kW row load, providing centralized power monitoring and control across all three enclosures. For teams running dense 1U/2U compute with GPU acceleration or high-port-count switching, 20 kW row capacity prevents the under-provisioning that forces expensive retrofits at 18 months post-install.
• Power Redundancy with 6 x 30 A PDUs: Six 30 A PDUs — two per enclosure — deliver dual-path power feeds to rack equipment. If one feed drops, the other carries the load without interrupting connected systems. This doubles the PDU count versus the non-redundant SR2N03020NAA1 variant (3 PDUs), and is the defining reason to specify the PAA SKU over the NAA in any availability-sensitive deployment.
• 6.6 kW Capacity Per Rack: Each of the three 42U enclosures is allocated 6.6 kW of the total 20 kW budget. That headroom comfortably supports mid-density server loads — two to four 2U servers with 400–500W TDP each — or high-port-count PoE switching gear drawing 3–5 kW per chassis. It is not sized for blade chassis running at full thermal envelope; plan around that ceiling early.
• 42U x 600mm x 1400mm Enclosure Footprint: The 42U height maximizes rack unit density without requiring non-standard ceiling clearances. The 600 mm width fits standard 24-inch floor tile grids. The 1400 mm depth accommodates full-depth servers and doubles as cable management space for rear-run structured cabling — a practical fit for most enterprise network infrastructure deployments.
• Single Cooling Unit: The SR2N03020PAA1 ships with one cooling unit. This is appropriate for moderate ambient environments with supplemental room cooling. If your environment requires N+1 cooling redundancy at the row level, the SR2N03020FAA1 variant adds a second cooling unit (and extends the row to 3,000 mm with fire suppression). Cooling architecture is a design-stage decision — do not specify PAA if the site has no backup cooling capacity.
• No Fire Suppression (AA1 Suffix): The AA1 configuration ships without integrated fire suppression. This is the standard choice for deployments where building-level suppression systems (FM-200, NOVEC, sprinkler) already cover the IT space. If local code or insurance requires rack-level suppression, step to the AA2 variants — note that AA2 extends the assembled row length by 600 mm to 3,300 mm.
• 2,700 mm Assembled Row Length: At 2,700 mm, this row fits within a standard 3-meter aisle width without encroaching on hot-aisle or cold-aisle airflow lanes. It is the same footprint as the 10 kW three-rack variants (SR2N03010PAA1), so it can slot into an existing rack-row floor plan when upgrading power tier without re-engineering the physical layout.

Integration and Compatibility

The 20kW PMC distribution architecture is designed to integrate with Vertiv's broader power management ecosystem. PDU-level monitoring data can feed into facility DCIM platforms for per-rack power tracking and capacity planning. The rack PDU configuration uses 30 A circuits throughout, requiring 30 A branch breakers at the upstream panel — confirm your electrical infrastructure supports this before specifying. The row is compatible with standard raised-floor and concrete-slab deployments; no proprietary floor anchoring system is required per the SR2 series design. Adjacent rows can be planned using the same 2,700 mm length increment for consistent aisle geometry.

When This Is the Correct Choice

Specify the SR2N03020PAA1 when you need 20 kW of capacity across three racks, dual-path power redundancy is required, fire suppression at the rack level is not required (building suppression covers it), and your site ceiling and floor load can accommodate a standard-depth 2,700 mm row. It is the right model for edge data centers, campus IT rooms, and distributed enterprise compute nodes where uptime is critical but the budget and footprint do not support a full-suppression build-out.

When to Choose a Different Model

If you need N+1 cooling redundancy at the row level, or if local code requires integrated fire suppression, step up to the SR2N03020FAA2 — it adds a second cooling unit and suppression, though the row extends to 3,600 mm. If three racks at 6.6 kW each will not cover projected load growth, the SR2N04020PAA1 (four racks, 20 kW, 5 kW per rack) or SR2N05020PAA1 (five racks) distribute the same 20 kW budget across more enclosures at lower per-rack density, which suits broader, lower-density deployments. If 20 kW total is more than your current load warrants and cost efficiency matters, the SR2N03010PAA1 delivers 10 kW across the same three-rack, 2,700 mm footprint at lower infrastructure cost.

Frequently Asked Questions

Q: What is the difference between the SR2N03020PAA1 and the SR2N03020NAA1?

A: The PAA1 variant includes 6 x 30 A PDUs providing dual-path (redundant) power feeds — two PDUs per enclosure. The NAA1 variant has only 3 PDUs (one per enclosure, no redundancy). Both share the same 20 kW total capacity, three-rack layout, and 2,700 mm assembled length. Choose PAA1 when a single PDU failure cannot result in a system outage.

Q: Does the SR2N03020PAA1 include integrated fire suppression?

A: No. The AA1 suffix designates configurations without integrated fire suppression. If rack-level suppression is required by code or policy, specify the AA2 variants (e.g., SR2N03020PAA2), which include suppression but extend the row to 3,300 mm.

Q: How many rack units are available per enclosure?

A: Each of the three enclosures is a 42U frame with 600 mm width and 1400 mm depth. The 42U height is standard for full-depth server and switching equipment.

Q: What is the per-rack power budget on the SR2N03020PAA1?

A: Each of the three enclosures is allocated 6.6 kW from the 20 kW PMC distribution total. This supports moderate-to-high density compute loads per rack; it is not designed for fully loaded high-density blade chassis running at maximum thermal output.

Q: How many cooling units does the SR2N03020PAA1 ship with?

A: One cooling unit. For deployments requiring redundant cooling at the row level, the FAA variants include a second cooling unit, though they extend the row length and add fire suppression.

Q: What upstream electrical infrastructure does the SR2N03020PAA1 require?

A: All six PDUs are 30 A units, requiring 30 A branch circuits at the upstream distribution panel. Confirm your electrical infrastructure supports this amperage before specifying this row system.

Ted Perry

The SR2N03020PAA1 is the model I reach for when a customer needs 20 kW of row capacity with redundant power feeds and does not want to pay for suppression infrastructure they already have at the building level. The six 30 A PDUs — two per enclosure — are the core differentiator: each rack has an A-feed and a B-feed, so you can wire dual-corded servers and switches without any additional PDU procurement or field wiring beyond the upstream panels.

Technical Highlights:

• 6 x 30 A PDUs across 3 enclosures: Dual-feed architecture per rack is pre-engineered — no field modifications required to achieve A/B power paths. The alternative NAA1 single-feed variant saves money but eliminates fault tolerance at the PDU level entirely.
• 6.6 kW per-rack allocation: Sufficient for two to four mid-density 2U servers or high-port-count switching per bay at typical real-world draw (not nameplate). If you are running 10 kW+ per rack, this row is not the right tier — step to a higher-density single-rack system with dedicated in-row cooling.
• 2,700 mm row length (no suppression): Identical footprint to the 10 kW PAA1 three-rack variant. If you are upgrading a site from 10 kW to 20 kW row capacity, the SR2N03020PAA1 drops into the same floor plan without aisle re-engineering — a real time saver on phased buildouts.

Deployment Considerations:

• Upstream electrical must support six independent 30 A branch circuits. On older facilities with 20 A breaker panels, this requires a panel upgrade before commissioning — budget for it in the project scope.
• This row ships with one cooling unit. In environments above 25°C ambient or with intermittent CRAC failure risk, the single cooling unit is a single point of failure for thermal management. Either specify the FAA variant for dual cooling, or ensure room-level N+1 cooling is verified and tested before go-live.

Best fit: an edge data center or campus IT room running 20–30 servers and supporting PoE switching infrastructure, where the building has existing FM-200 or NOVEC suppression, dual utility feeds or UPS A/B are already in place, and the floor plan cannot absorb a row longer than 2,700 mm. That is a common profile for regional office data rooms and healthcare branch sites, and it is exactly what this system is configured to serve.