APC Netshelter SX GEN 2 45U Server Rack Enclosure 750MM X 1070MM W/ Sides Black - AR3155B2

APC by Schneider Electric AR3155B2 NetShelter SX Gen 2 45U Server Rack Enclosure

Overview

The APC by Schneider Electric AR3155B2 is a 45U, 750 mm wide by 1,070 mm deep freestanding server rack enclosure built for data center rows, server rooms, and high-density IDF closets where structural integrity and cable access matter as much as raw capacity. At 2,124 mm tall with a 19-inch mounting standard and adjustable mounting depth ranging from 286 mm to 915 mm, the AR3155B2 accommodates everything from shallow patch panels to deep blade-server chassis without requiring a second enclosure. Side panels ship installed, the key lock is standard on both sides and the front door, and 270-degree door swing means you can fully stage equipment on a cart beside the rack without the door cutting off your working angle — a small detail that saves real time during dense deployments.

Key Features

• 45U Rack Capacity with 19-Inch Mounting Standard: 45 rack units gives you room for a full compute stack — a mix of 1U servers, patch panels, PDUs, and cable management arms — without hitting the ceiling of a 42U frame mid-project. The standard 48.3 cm (19-inch) EIA mounting rail means every certified rackmount component drops straight in without adapter plates.
• 750 mm Width, 1,070 mm Depth: The 750 mm width is the right choice when your row density requires side-by-side deployment with room for structured cable management on the sides. The 1,070 mm depth handles deep dual-post equipment (full-depth blade enclosures, large UPS units, dense storage arrays) that would physically overhang a 900 mm or 1,000 mm cabinet.
• 1,814 kg Static Load Capacity: The static load rating of 1,814 kg means you can fully populate this enclosure with high-density compute and storage equipment without structural concern. For comparison, a fully loaded 42U server rack typically weighs under 700 kg — this rating gives you substantial headroom even for the densest configurations.
• 1,020 kg Rolling Load Capacity: The rolling capacity of 1,020 kg means you can move a substantially loaded rack on its casters for repositioning without unloading it first — practical during staged rollouts or floor layout changes where downtime matters.
• Adjustable Mounting Depth 286 mm to 915 mm: The 286–915 mm adjustment range covers the full spectrum of rackmount equipment from shallow 1U switches to deep UPS units and storage enclosures. You set the depth once per project; no need to source a separate deep or shallow variant.
• 270° Door Opening Angle: Doors that open to 270 degrees fold flat against the side of the cabinet. This matters in tight rows where a door opening to 90° or 120° would block aisle access or the adjacent rack entirely — particularly relevant in high-density rows with 600–700 mm aisle spacing.
• Key Lock on Door and Side Panels: Both the front/rear doors and the removable side panels include key locks. In mixed-access environments — shared data centers, multi-tenant co-lo spaces, or server rooms that double as storage — this keeps unauthorized hands off internal cabling and equipment without requiring a full cage enclosure.
• Adjustable Feet Included: The leveling feet handle uneven raised-floor tiles and poured concrete with slight grade variations — eliminating rack wobble that can stress cable connections and complicate door alignment on adjacent enclosures.
• Side Panels Included: Side panels ship with the enclosure and are lockable, so you receive a complete, enclosed cabinet out of the box. No separate panel kit purchase required before deployment.

Integration & Compatibility

The AR3155B2 is built to the 19-inch EIA-310 standard, making it compatible with all standard rackmount equipment from servers, switches, and patch panels to PDUs, KVM switches, and UPS units. The adjustable mounting depth range (286–915 mm) ensures compatibility with both shallow networking equipment and deep compute/storage platforms. APC's NetShelter SX Gen 2 ecosystem includes compatible blanking panels, cable management arms, power distribution units, and airflow management accessories that install directly into this enclosure without modification. If you are integrating with a structured cabling system, the 750 mm cabinet width provides sufficient side-channel space for vertical cable managers on both sides of the enclosure.

Frequently Asked Questions

Q: What is the maximum static load capacity of the AR3155B2?

A: The AR3155B2 supports a maximum static load of 1,814 kg, making it suitable for fully populated high-density server and storage deployments.

Q: What is the adjustable mounting depth range on the AR3155B2?

A: The mounting rails adjust from 286 mm (minimum) to 915 mm (maximum), covering the full range of standard rackmount equipment depths.

Q: Are side panels included with the AR3155B2?

A: Yes. Side panels are included and ship installed. Both side panels include a key lock for access control.

Q: What door opening angle does the AR3155B2 support?

A: The doors open to 270 degrees, allowing them to fold flat against the side of the cabinet — useful in tight aisle configurations where a narrower swing angle would obstruct adjacent equipment or aisle access.

Q: What are the external dimensions of the AR3155B2?

A: The enclosure is 750 mm wide, 1,070 mm deep, and 2,124 mm tall. The shipping package measures 853 mm wide and 1,158 mm deep.

Q: Is the AR3155B2 compatible with standard 19-inch rackmount equipment?

A: Yes. The AR3155B2 uses the standard 48.3 cm (19-inch) EIA-310 mounting rail, compatible with all standard rackmount servers, switches, patch panels, PDUs, and UPS units.

Marty Allison

I recommend the AR3155B2 specifically for deployments where equipment depth variability is a real planning constraint — the 286 mm to 915 mm adjustable mounting depth range in this enclosure means you can rack a shallow 1U TOR switch and a full-depth blade chassis in the same cabinet without shimming or custom hardware. That kind of flexibility is genuinely useful when your final BOM isn't locked before the rack ships.

Technical Highlights:

• 1,814 kg Static Load Rating: This is a structural ceiling most integrators will never approach — a fully populated 45U rack with high-density 2U servers rarely exceeds 600–700 kg. The headroom means you're not re-engineering the floor loading plan every time a customer adds a storage shelf.
• 270° Door Swing: In a 600 mm hot-aisle configuration, a door that only opens 90° is a collision hazard with a loaded cart. The 270° swing on the AR3155B2 folds the door completely out of the aisle — practical on day-one install and every maintenance visit after.
• 750 mm Cabinet Width: The 750 mm form factor (vs. the common 600 mm) gives you the side-channel space to run vertical cable managers on both sides without crimping bend radius on fiber or copper patch runs. Relevant when you're terminating 24+ port patch panels per RU.

Deployment Considerations:

• At 2,124 mm tall, verify ceiling clearance before delivery — raised-floor data centers with 2,400 mm floor-to-ceiling often have cable trays or CRAC unit ducts at 2,200–2,300 mm that this cabinet will approach closely during positioning.
• The 1,020 kg rolling load rating is the moving limit, not the static limit. If you load the cabinet above 1,020 kg and need to reposition it, you will need to partially unload before moving — plan your build sequence accordingly if floor layout changes are anticipated post-commission.

The AR3155B2 is the right call for enterprise server room builds and co-location deployments where you need a high-capacity, full-depth enclosure with physical access controls and aisle-friendly door geometry from day one.