APC by Schneider Electric Netshelter SX 48U 750MM Wide X 1200MM Deep Enclosure - AR3357SP

APC by Schneider Electric AR3357SP NetShelter SX 48U Freestanding Rack Enclosure

The AR3357SP is APC's NetShelter SX 48U freestanding enclosure built for high-density data center, server room, and network equipment deployments where depth and load capacity matter. At 750 mm wide and 1200 mm deep with a 2,000 lb dynamic load rating, this is a rack designed to handle fully populated switch stacks, dense 2U servers, or heavy UPS units without forcing compromises on cabling or airflow management. If you're outfitting a new rack row or replacing aging open-frame racks with enclosed, locking infrastructure, the AR3357SP earns serious consideration.

Key Features

• 48U Usable Space: 48U of equipment space gives you room to consolidate an entire server, networking, and power distribution stack into a single enclosure — reducing floor footprint while keeping everything within a single cable management envelope. For most mid-enterprise deployments, 48U is the sweet spot between a too-short 42U and a floor-to-ceiling 52U that's awkward to service.
• 750 mm Width: The 750 mm wide profile (vs. the standard 600 mm) accommodates deeper cable management accessories, wider blanking panels, and side-mounted PDU brackets without fighting for space. If you're running structured cabling with high patch-panel density, the extra 150 mm of interior horizontal room is immediately useful.
• 1200 mm Depth: A 1200 mm interior depth comfortably handles 1000 mm-depth servers, rear-mounted PDUs, and horizontal cable managers simultaneously — without stacking them awkwardly. Shallow racks force you to choose between rear PDU placement and proper cable routing; this enclosure doesn't.
• 2,000 lb Dynamic Load Rating: The rated 2,000 lb capacity means you can fully populate this rack with heavy enterprise hardware — dual-corded UPS units, blade chassis, dense storage arrays — and still roll it into position without worrying about structural limits. Static load capacity is higher; the dynamic figure is the relevant one for any rack that will be moved post-install.
• Sides Included: Unlike open-bay NetShelter configurations, the AR3357SP ships with side panels installed. Enclosed sides matter for three reasons: they support containment aisle configurations (hot/cold), they reduce cross-aisle noise bleed in open data center floors, and they prevent unauthorized lateral access to rear cable runs without requiring a secondary cage.
• Key-Locking Front and Rear Doors: Keyed locks on the enclosure provide physical access control without requiring a separate cage or room-level lock. In co-location environments or shared machine rooms, this is a baseline requirement — not an option.
• All-Metal Construction: The steel frame and panels provide the structural rigidity needed to support the 2,000 lb load rating over years of thermal cycling and equipment swaps. Composite or aluminum-heavy enclosures at this weight class typically require additional bracing; the NetShelter SX steel construction handles it natively.
• UL 60950, RoHS, EOLI, PEP Certified: UL 60950 certification means the enclosure has been independently tested to information technology equipment safety standards — a hard requirement for many enterprise procurement and insurance policies. RoHS compliance keeps you clear of restricted hazardous substances, relevant for EU deployments or any organization with global environmental standards.
• 19-inch EIA Standard Rails: The 19-inch (48.3 cm) rail standard means every standard rack-mount device drops straight in without adapter rails or modification — switches, servers, patch panels, UPS units, KVM drawers. Compatibility is universal across the enterprise hardware ecosystem.

Integration and Compatibility

The AR3357SP integrates directly into APC's broader NetShelter ecosystem. The 750 mm wide footprint is compatible with APC's Hot Aisle/Cold Aisle containment panels, roof blanking panels, and side-by-side joining hardware — important if you're building out a structured rack row rather than deploying standalone. The 1200 mm depth aligns with APC's extended-depth PDU and cable management offerings. Third-party 19-inch accessories — blanking panels, cage nuts, cable managers from any vendor — install without modification.

For power distribution, the enclosure depth accommodates rear-mounted vertical PDUs (typically 0U mounted on the rear uprights) alongside fully cabled rear server ports. Plan cable management carefully at 1200 mm depth: horizontal cable managers and patch panel routing need to account for the additional rear clearance, which is an advantage, not a liability.

The package ships at 301.6 kg (approximately 665 lbs) — factor freight handling and a mechanical lift into your delivery planning. The assembled enclosure requires a standard commercial loading dock or liftgate service for most building deliveries.

Frequently Asked Questions

Q: What is the usable rack unit capacity of the AR3357SP?

A: The AR3357SP provides 48U of usable rack space on standard 19-inch EIA rails, accommodating servers, switches, patch panels, PDUs, and other standard rack-mount equipment.

Q: Does the AR3357SP include side panels?

A: Yes. The AR3357SP ships with side panels included, supporting hot/cold aisle containment configurations and providing enclosed lateral access control out of the box.

Q: What is the weight capacity of the AR3357SP?

A: The AR3357SP carries a 2,000 lb dynamic load rating, suitable for fully populated high-density deployments including blade chassis, storage arrays, and dual-corded UPS units.

Q: What certifications does the AR3357SP carry?

A: The AR3357SP is certified to UL 60950 (IT equipment safety), RoHS (restricted hazardous substances), and carries PEP and EOLI environmental compliance designations.

Q: Is the AR3357SP compatible with APC containment systems?

A: The 750 mm wide NetShelter SX footprint is designed to integrate with APC's hot aisle/cold aisle containment panels and roof blanking kits, making it a direct fit for structured rack-row containment builds.

Q: What are the shipping dimensions and weight for the AR3357SP?

A: The packaged unit ships at 1105 mm wide × 1320.8 mm deep × 2450 mm tall and weighs 301.6 kg (approximately 665 lbs). Plan for a freight delivery with liftgate or loading dock capability.

Marty Allison

The AR3357SP is the enclosure I recommend when an integrator is building out a dense rack row and can't afford to retrofit for depth later. The 1200 mm depth is the spec that matters most in practice — I've seen too many 42U, 1000 mm-depth racks turn into a cable management nightmare the moment rear PDUs and patch panel runs compete for the same 200 mm of rear clearance. With the AR3357SP, that problem doesn't exist.

Technical Highlights:

• 2,000 lb Dynamic Load Rating: At 2,000 lbs rated dynamic capacity, this enclosure handles fully populated high-density builds — dual UPS, blade chassis, and storage — without structural compromise during repositioning.
• 750 mm Width + 1200 mm Depth: The wider-than-standard profile and extended depth work together: 750 mm width allows proper side-mounted PDU brackets and cable management accessories without pinching interior equipment clearance; 1200 mm depth lets rear cabling coexist with rear-mounted 0U PDUs.
• UL 60950 Certified: Independent UL safety certification satisfies the hard procurement requirements common in enterprise, healthcare, and government IT deployments — not a nice-to-have when the customer's facilities team is signing off on rack installations.

Deployment Considerations:

• The packaged unit ships at 301.6 kg (665 lbs) — coordinate freight delivery with liftgate or dock access before the order ships, not after. Residential or standard commercial deliveries without loading docks will require a specialized freight service.
• The 2258 mm assembled height (plus casters or leveling feet) may clear standard 7-foot dropped ceilings by very little — confirm ceiling clearance and any overhead cable tray routing before finalizing rack placement in low-ceiling server rooms.

The AR3357SP is the right enclosure for structured rack-row builds in enterprise data centers, co-location deployments requiring keyed access control per-cabinet, and high-density compute environments where 1000 mm-depth servers are the baseline — not the exception.