APC Netshelter SX Networking Enclosure GEN2 42U 1991HX750WX1200DMM with Vertic - AR3340B2

APC by Schneider Electric AR3340B2 42U NetShelter SX Gen2 Network Rack Enclosure

Overview

The APC NetShelter SX AR3340B2 is a 42U, 750mm-wide by 1200mm-deep floor-standing rack enclosure built for network equipment rooms, data centers, and structured wiring closets where physical infrastructure density and cable management are non-negotiable. At 1991mm tall (78.4 in) and with a maximum usable mounting depth of 959mm (37.8 in), this enclosure accommodates deep switching, routing, and server hardware without compromise. Baying hardware is included out of the box, making it straightforward to bolt adjacent enclosures together into a unified row — a practical consideration when you're planning a multi-rack deployment and need a predictable parts list before the project starts.

The NetShelter SX line is APC's workhorse data center enclosure family, and the AR3340B2 represents the Gen2 revision of that platform. If you're standardizing a rack environment — whether in a telecom room, a branch IDF, or a primary data center — this is the enclosure that integrates cleanly with APC's own power distribution, cooling, and monitoring accessories as well as third-party equipment that follows standard EIA-310 rack spacing.

Key Features

• 42U Rack Height (1991mm / 78.4 in): Forty-two rack units is the industry standard for full-height floor-standing enclosures. That's enough vertical space to house a full complement of patch panels, switches, UPS units, and servers without stacking compromises. If your equipment list grows post-deployment, you're not immediately up against the ceiling of your enclosure.
• 750mm Width: The 750mm-wide footprint is wider than the entry-level 600mm variant, and that extra 150mm matters in practice — more room for side-mounted cable managers, wider blanking panels, and easier access when working alongside high-density patching. Plan your floor tile or raised floor cutout accordingly before installation day.
• 1200mm Depth with 959mm Usable Mounting Depth: Modern hyperscale switches, high-density patch shelves, and dual-corded UPS units run deep. The AR3340B2's 1200mm overall depth translates to 959mm (37.8 in) of usable equipment mounting depth — enough to house virtually any current enterprise network or compute hardware without resorting to extension brackets.
• Baying Hardware Included: Multi-rack rows require baying kits to mechanically couple adjacent enclosures and align them precisely. APC includes baying hardware with the AR3340B2, which removes a common line-item surprise from your procurement list and ensures you're using manufacturer-matched hardware for the structural connection.
• Not Rack-Mountable Form Factor: This is a floor-standing enclosure — it's designed to be installed on a raised floor, computer room floor, or equipment room floor, not mounted inside another rack. Factor this into your room layout and cooling airflow planning from the start.
• Black Finish: The standard black powder coat finish is consistent with most data center and IDF environments. No special finish variants to navigate — what you see in the spec is what ships.
• NetShelter SX Gen2 Platform: The SX enclosure family has broad accessory compatibility within APC's ecosystem — PDUs, blanking panels, cable managers, roof fan trays, and side panels are all designed to the same rail and mounting standards. Standardizing on this platform means accessories ordered separately will fit without modification.

Integration & Compatibility

The AR3340B2 follows EIA-310 rack unit spacing, which means standard 19-inch rack equipment from any vendor installs without adapter hardware. The network infrastructure accessories ecosystem around the NetShelter SX platform is extensive — APC's own rack power distribution units, blanking panels, and airflow management accessories are all designed to the same rail geometry.

For structured cabling environments, the 1200mm depth accommodates rear cable management arms (CMA) on rack-mount servers without requiring door removal. If you're deploying alongside APC's APC rack enclosure and power line, the baying hardware included with this unit is matched to the same SX Gen2 rail profile.

When planning a multi-enclosure row, confirm floor load ratings before finalizing the layout. At 355.74 lb (161.36 kg) empty, the AR3340B2 is a substantial physical structure before a single piece of equipment is installed. Raised floor tiles and floor reinforcement planning should account for that baseline weight plus the full populated equipment load.

For buyers evaluating rack enclosures for mixed IT and physical security infrastructure — such as NVR appliances, access control servers, and network switching — the 42U height and 959mm usable depth make this a practical single-enclosure solution for converged IT/security equipment rooms.

Frequently Asked Questions

Q: What is the usable mounting depth inside the AR3340B2?

A: The AR3340B2 provides 959mm (37.8 in) of maximum usable mounting depth. The overall enclosure depth is 1200mm, with the difference accounted for by the door, rear panel, and structural frame.

Q: Does the AR3340B2 include baying hardware for joining multiple enclosures?

A: Yes. Baying hardware is included with the AR3340B2, allowing adjacent NetShelter SX enclosures to be mechanically coupled into a single row without a separate accessory order.

Q: How many rack units does the AR3340B2 provide?

A: The AR3340B2 is a 42U enclosure, standing 1991mm (78.4 in) tall. This is the full-height standard for floor-standing data center rack enclosures.

Q: What is the empty weight of the AR3340B2?

A: The AR3340B2 weighs 355.74 lb (161.36 kg) empty. Factor this into floor load planning before installation, particularly on raised floors or in older facilities with weight restrictions.

Q: Is the AR3340B2 designed for floor installation or rack mounting inside another enclosure?

A: The AR3340B2 is a floor-standing enclosure and is not rack-mountable. It is designed to be installed directly on a data center or equipment room floor, or on a raised floor system.

Q: What width is the AR3340B2, and why does it matter?

A: The AR3340B2 is 750mm wide. This is wider than the 600mm variant in the NetShelter SX family, providing additional clearance for side-mounted cable managers and easier hands-on access in high-density patching environments.

Marty Allison

The AR3340B2 is a serious floor-standing enclosure — at 355.74 lb empty and 1991mm tall, this isn't a unit you position casually. When I spec this for a customer, the first conversation is always about floor load, not rack unit count. The 42U height is standard, but the 750mm width paired with 959mm usable mounting depth puts this in a different class than the narrower SX variants and is the right call for any environment running deep chassis switching or dual-corded UPS configurations.

Technical Highlights:

• 959mm Usable Mounting Depth: Current-generation enterprise switches and storage arrays commonly run 800–900mm in chassis depth. The AR3340B2's 959mm usable space means those units mount flush without extension rails or door-removal workarounds.
• 750mm Width: The 150mm advantage over 600mm-wide enclosures is tangible when you're terminating high-density fiber or managing dual cable runs — side cable manager arms need that room, and field technicians will thank you on every maintenance visit.
• Baying Hardware Included: Multi-rack row deployments where baying kits are missing from the original PO create annoying project delays. APC ships this hardware with the AR3340B2, which eliminates one of the most common rack deployment afterthoughts.

Deployment Considerations:

• At 161.36 kg empty, calculate your populated weight before finalizing raised floor tile selection — a fully loaded enclosure with high-density switching and UPS hardware can easily push past the rated capacity of standard floor tiles.
• The AR3340B2 is not rack-mountable and requires floor installation. Confirm your facility's equipment room floor plan accommodates a 750mm x 1200mm footprint including aisle clearance before the unit ships.

This enclosure is the right specification for primary IDF rooms and small data center deployments where you're housing converged network and physical security infrastructure — NVR appliances, access control servers, PoE switching — and need the depth and width to do it without equipment overhang or cable management compromises.