APC by Schneider Electric AR3300W NetShelter SX 42U 600mm x 1200mm Deep Rack Enclosure
The AR3300W is the white-finish variant of APC's NetShelter SX series — a 42U, 600mm-wide by 1200mm-deep free-standing steel enclosure built for network equipment rooms, server closets, and infrastructure deployments where standardized rack mounting, cable management depth, and UL-listed construction are non-negotiable. If you're deploying network switches, patch panels, and 1U servers in a shared space and need a rack that meets EIA-310E mounting standards out of the box, this is the enclosure to spec. Browse the full APC by Schneider Electric catalog for complementary power and cooling infrastructure.
Overview
The NetShelter SX line is APC's mid-to-high tier enclosure family, targeting commercial IT infrastructure, security operations centers, and data closets. The AR3300W fills 42U of usable rack space — enough to house a full network stack, an NVR or DVR array, a network video recorder, patch management, and UPS hardware in a single cabinet. The 600mm width fits the standard EIA-310E 19-inch rail pattern while the 1200mm depth accommodates deep 2-post and 4-post equipment without cramped cable runs behind the gear. The white powder coat is specified for environments where aesthetics or facility standards call for lighter-colored cabinetry, common in healthcare, education, and clean-room adjacent deployments.
Key Features
- 42U Rack Capacity: 42U gives you roughly 73.5 inches of usable vertical mounting space — enough headroom to build out a dense network and security stack without stacking cabinets or splitting infrastructure across rooms. Fewer cabinets means fewer inter-rack cable runs and simpler power distribution.
- 600mm Width: Standard 19-inch EIA-310E rail spacing is maintained within the 600mm external footprint. This is the narrower of the two common NetShelter SX widths (the other being 750mm), making it the right pick when floor space is constrained or when you're aligning with an existing row of same-width enclosures.
- 1200mm Depth: The 1200mm interior depth handles today's deep 1U and 2U switches, firewalls, and storage arrays without forcing compromises on cable bend radius. Shallower enclosures often require equipment to hang beyond the rear rail — not an issue here. This depth also provides room for structured rack accessories like horizontal cable managers and rear vertical lacing bars.
- Steel Construction: The welded steel frame and steel side panels provide the structural rigidity required for fully loaded racks. This isn't decorative sheet metal — the frame is engineered to hold the cumulative weight of dense switching, server, and UPS hardware without flex that would bind sliding rails or drawer mechanisms.
- Free-Standing Design: No wall anchoring or overhead structure required. Drop it on the raised floor or concrete slab, level it, and begin populating. For deployments that evolve over time, the free-standing format allows the enclosure to be repositioned without construction work.
- UL 2416 and UL 60950-1 Listed: UL 2416 covers rack and cabinet enclosures specifically, and UL 60950-1 applies to IT equipment safety — both listings matter for facility compliance sign-off and insurance underwriting in commercial and enterprise environments. If your IT or facilities team requires UL-listed enclosures, the AR3300W satisfies that requirement without additional paperwork.
- EIA-310E Compliance: EIA-310E defines the mechanical standards for 19-inch rack-mounted equipment — hole spacing, rail dimensions, and load ratings. Compliance means any standard 19-inch rackmount device installs without adapter brackets or shimming. This is the baseline expectation for commercial IT, but worth confirming on lower-cost alternatives where it isn't always present.
- White Finish: The white powder coat is the specific differentiator of the AR3300W versus the standard black NetShelter SX equivalents. Specify white when facility management, building standards, or client-facing environments require it. It is functionally identical to the black variant — the color difference is cosmetic only.
Integration and Compatibility
The AR3300W accepts any standard EIA-310E 19-inch rackmount equipment — switches, routers, firewalls, patch panels, UPS units, KVM switches, NVRs, and server hardware. APC's NetShelter SX accessories including side panels, roof panels, blanking panels, cable management arms, and power distribution units (PDUs) are designed around this enclosure series. If you are integrating APC Smart-UPS or Symmetra UPS hardware, verify that the UPS form factor and depth fall within the 1200mm internal clearance. The 600mm external width is the governing constraint for row-based deployments where side-by-side enclosures must maintain a consistent footprint.
Frequently Asked Questions
Q: What is the usable rack space in the AR3300W?
A: The AR3300W provides 42U of usable rack space, which is approximately 73.5 inches of vertical mounting height for standard 1U, 2U, and larger rackmount equipment.
Q: What rail standard does the AR3300W use?
A: The AR3300W is EIA-310E compliant, meaning it supports standard 19-inch rack-mounted equipment with no adapter brackets required for compliant hardware.
Q: Is the AR3300W the same as the standard black NetShelter SX 42U 600x1200mm?
A: Functionally, yes. The AR3300W is the white-finish variant of the NetShelter SX 42U 600mm x 1200mm enclosure. The 'W' suffix in the MPN designates the white powder coat. Internal dimensions, rail spacing, and load capacity are equivalent to the black version.
Q: What certifications does the AR3300W carry?
A: The AR3300W is listed to UL 2416 (rack and cabinet enclosures) and UL 60950-1 (IT equipment safety), and meets EIA-310E mechanical standards.
Q: Can the AR3300W be used for security and surveillance equipment?
A: Yes. The 42U depth and 1200mm internal clearance accommodate NVRs, network switches, patch panels, and UPS hardware typical of a security operations infrastructure build-out.
Q: Does the 600mm width fit in a standard data center row?
A: 600mm is one of the two standard external widths in the NetShelter SX line. It fits flush in rows designed for 600mm enclosures. If your row spec is 750mm, you need the wider NetShelter SX variant instead.
The AR3300W is a purpose-built answer to a specific deployment constraint: you need 42U of rack capacity in the narrower 600mm footprint, and your facility or client standard calls for white cabinetry. The 1200mm depth is the spec I pay attention to first on a job — it means deep switching gear, rear-mounted PDUs, and structured cable management can all coexist without forcing equipment to overhang the rear rail, which is a real-world problem in 800mm or 1000mm-deep cabinets.
Technical Highlights:
- UL 2416 + UL 60950-1 Listings: Both listings together satisfy most commercial facility compliance requirements without needing to chase additional documentation — relevant when the enclosure is part of a permitted IT buildout or an insured installation.
- EIA-310E Rail Compliance: Standard hole spacing and rail dimensions mean zero compatibility surprises with any vendor's 19-inch equipment. On multi-vendor stacks — switches, NVRs, patch panels, UPS — this matters more than it sounds when you're on-site and your mounting hardware needs to work the first time.
- Steel Frame, Free-Standing: The steel construction handles the cumulative weight of a fully populated 42U stack. Free-standing installation removes the dependency on wall or overhead structure, which is the right call for raised-floor data rooms and security operations closets that weren't designed for wall-anchored racks.
Deployment Considerations:
- The 600mm external width is the governing constraint for row alignment — verify your floor plan calls for 600mm enclosures before ordering. Mixing 600mm and 750mm enclosures in the same row creates alignment and cable tray mismatches that are annoying to resolve after delivery.
- The white finish is the only functional difference from the black NetShelter SX equivalent. If your facility doesn't have a white-cabinet requirement, the black variant may have broader accessory availability in your distributor's stock at any given time.
The AR3300W is the right spec for healthcare IT closets, education data rooms, and any client-facing or aesthetics-driven environment where white enclosure standards are enforced — combined with the 1200mm depth that keeps deep switching and security infrastructure properly housed without compromise.
