APC by Schneider Electric Netshelter SX 12U 600MM X 900MM - AR3003

APC by Schneider Electric AR3003 NetShelter SX 12U Freestanding Rack Enclosure

Overview

The AR3003 is APC's NetShelter SX 12U freestanding rack enclosure designed for IT closets, edge deployments, and distributed network infrastructure where a compact, secure cabinet is needed without the footprint of a full 42U floor unit. At 600mm wide and 900mm deep, it fits a standard 19-inch equipment rail pattern while accommodating deeper networking gear — switches, patch panels, and appliances up to 75.6 cm mounting depth without modification.

This is a purpose-built commercial-grade enclosure, not a wall bracket or open-frame shelf. It ships with side panels, a keyed front door, and a rear door, giving you a physically secured, dust-resistant cabinet that meets power and infrastructure requirements for server room and wiring closet deployments. The IP20 rating means it handles typical indoor environments — not rated for wet or harsh locations, so plan accordingly if the install site has humidity or particulate concerns.

Key Features

• 12U Capacity (19-inch EIA standard): Fits 12 rack units of equipment in a 48.3 cm (19-inch) mounting rail configuration — enough for a fully-loaded edge stack: a managed PoE switch, patch panel, small NVR or server appliance, and a UPS, without requiring a full-height cabinet. For camera system deployments with a network video recorder, this footprint handles the core recording stack cleanly.
• 272 kg Maximum Load Capacity: At 272 kg rated load, the AR3003 handles dense UPS hardware, heavy switching gear, or stacked appliances without structural concern. Relevant when loading a rack UPS alongside multiple 1U/2U appliances — budget gear often rates 100–150 kg, and shortfalls show up late in the project when everything is already mounted.
• 900mm Depth: The 900mm internal depth is the spec that separates this from shallower 600mm-deep competitors. Most enterprise-grade PoE switches, rackmount UPS units, and 1U servers have chassis depths between 400mm and 700mm — the AR3003 clears them with margin, eliminating cable management headaches caused by door clearance conflicts.
• 19.1–75.6 cm Adjustable Mounting Depth: Rail mounting positions adjust from 191mm to 756mm, so you can position shallow patch panels and deep switch chassis in the same enclosure without buying separate rail kits. That adjustability is what makes a mixed-equipment rack practical versus stacking two different enclosures.
• Keyed Front and Rear Door Locks: Physical key locks on both the front door and rear — relevant in shared wiring closets, retail back offices, or any environment where unauthorized personnel have incidental access. IP20 enclosure rating means internal components stay protected from direct finger contact and large particulates, appropriate for typical conditioned indoor spaces.
• Side Panels Included: Side panels ship in-box, not as a separate purchase. In a standalone deployment that matters — side panels complete the physical security perimeter and contribute to airflow management by preventing cross-rack bypass. For back-to-back or side-by-side installations, they can be removed as needed.
• UL 2416, UL 60950-1, REACH Certified: UL 2416 is the specific UL standard for IT equipment racks and enclosures — confirms the structure meets North American safety requirements for commercial IT installations. UL 60950-1 covers information technology equipment safety. REACH compliance addresses chemical substance restrictions relevant to EU deployments. These certifications matter when a facilities or IT compliance team needs documentation for building permits or equipment sign-off.
• Black Finish, 48.3 cm (19-inch) Form Factor: Standard 19-inch EIA rails mean any rack-mountable equipment fits without adapter kits. The black finish is consistent with APC's NetShelter SX line — relevant if visual uniformity across a multi-rack installation matters to the facilities team.

Integration and Compatibility

The AR3003 accepts any standard 19-inch rack-mountable equipment — network switches, patch panels, rackmount UPS units, NVRs, servers, and KVM systems. The adjustable rail depth range (19.1–75.6 cm) covers the overwhelming majority of commercial IT equipment without requiring aftermarket rail adapters. For security system builds pairing an NVR with a rackmount UPS and a managed PoE switch, the 12U count is typically sufficient for a 16–32 camera recording stack. If the deployment calls for more channels, more storage expansion bays, or blade-style equipment, step up to the larger NetShelter SX variants in the same APC enclosure line.

The enclosure's IP20 rating is appropriate for conditioned server rooms, IT closets, and indoor wiring rooms. It is not rated for outdoor use, dusty industrial environments, or locations subject to water spray — those deployments require an enclosure with a minimum IP54 rating or better. Review your install location's environmental classification before specifying this unit for edge or plant-floor deployments. For broader infrastructure planning, consult a rack and enclosure selection guide to match enclosure specs to environment.

Frequently Asked Questions

Q: What is the maximum equipment load the AR3003 can support?

A: The AR3003 is rated for a maximum load of 272 kg (approximately 600 lbs). This covers dense configurations including rackmount UPS units, heavy switching gear, and stacked server appliances.

Q: Will standard 19-inch rack equipment fit the AR3003?

A: Yes. The AR3003 uses a standard 48.3 cm (19-inch) EIA rail configuration compatible with any rack-mount equipment following the 19-inch standard. The adjustable mounting depth range of 19.1 cm to 75.6 cm accommodates both shallow patch panels and deep switch or server chassis without additional rail kits.

Q: Does the AR3003 ship with side panels?

A: Yes. Side panels are included in the box with the AR3003 — they are not a separate accessory purchase.

Q: Is the AR3003 suitable for outdoor or industrial environments?

A: No. The AR3003 carries an IP20 rating, which is appropriate for conditioned indoor environments (server rooms, IT closets, wiring rooms). It is not rated for outdoor use, wet locations, or dusty industrial spaces. Deployments in those environments require a minimum IP54-rated enclosure.

Q: What certifications does the AR3003 hold?

A: The AR3003 is certified to UL 2416 (the UL standard specifically for IT racks and enclosures), UL 60950-1 (IT equipment safety), and meets REACH chemical substance compliance requirements relevant for EU installations.

Q: How many rack units does the AR3003 provide?

A: The AR3003 provides 12U of usable rack space. For a typical camera system edge stack — managed PoE switch, rackmount NVR, patch panel, and 1U UPS — 12U is generally sufficient for a 16–32 camera deployment.

Marty Allison

The AR3003 is a straightforward specification decision once you know your equipment list. I reach for this enclosure when a deployment calls for 12U or fewer rack units in a secured, freestanding cabinet — the 900mm depth is the differentiator over shallower 600mm alternatives, and it makes a real difference when you're mounting enterprise-class PoE switches alongside a rackmount UPS in the same enclosure without fighting door clearance.

Technical Highlights:

• 272 kg Load Rating: Higher than most compact-format competitors — relevant when combining a heavy 2U UPS (some rack UPS units run 30–50 kg alone) with a fully loaded NVR and switching hardware. Don't spec a 150 kg-rated enclosure for this configuration.
• 19.1–75.6 cm Adjustable Rail Depth: Covers virtually every commercial IT chassis size without aftermarket adapters. Practical for mixed-vendor builds where you're mounting a shallow patch panel alongside a 650mm-deep switch in the same 12U footprint.
• UL 2416 Certification: This is the enclosure-specific UL standard — not a generic equipment safety cert. Matters when a building inspector or corporate IT compliance review requires documentation that the rack itself meets North American structural and safety requirements.

Deployment Considerations:

• At 658mm height with a 600mm × 900mm footprint, plan your floor space and door clearance before delivery — this is a freestanding unit, not a wall-mount, and the rear door swing adds to the effective depth footprint in tight closets.
• IP20 is an indoor-only rating. If the wiring closet has HVAC condensation issues, poor particulate control, or is adjacent to a loading dock environment, this enclosure is not the right call — you need a higher IP-rated cabinet for those conditions.

For a distributed security system edge node — NVR, managed PoE switch, patch panel, and local UPS — the AR3003 covers that stack cleanly in a lockable, standards-certified enclosure that satisfies most commercial facilities requirements without oversizing to a 24U or 42U floor cabinet.