APC by Schneider Electric AR3350B2 NetShelter SX Gen 2 42U Server Rack Enclosure
Overview
The AR3350B2 is APC's NetShelter SX Gen 2 42U freestanding server rack enclosure in 750mm wide by 1200mm deep form factor — a configuration built for dense compute, storage, and networking deployments where you need maximum mounting depth without sacrificing floor footprint. At 1200mm deep and 104.8cm maximum mounting depth, it accommodates the longest 1U and 2U servers, high-density patch arrays, and full-depth switching equipment without compromise. This is the version with side panels and keyed locks included, so it ships ready for environments where physical access control matters from day one.
The black finish (RAL 9005) fits modern data center aesthetics and blends cleanly into mixed-vendor rows. If you're standardizing a server room or expanding an existing NetShelter SX row, the APC NetShelter SX rack line maintains consistent footprint and accessory compatibility across the family.
Key Features
- 42U Mounting Space: Forty-two rack units in a 1991mm-tall enclosure gives you enough vertical real estate to fully populate a mixed compute and switching stack — servers, patch panels, KVM, and power distribution — without splitting the load across two racks. That matters when you're trying to minimize the number of enclosures on the floor.
- 750mm Wide × 1200mm Deep Cabinet: The 750mm width (vs. the narrower 600mm variant) adds usable side clearance for cable routing and airflow management. The 1200mm depth handles full-depth enterprise server equipment — Dell PowerEdge, HPE ProLiant, Cisco UCS — without forcing cable-bend workarounds at the rear.
- 28.6cm to 104.8cm Adjustable Mounting Depth: The mounting rails adjust across a 76cm range, so you can front-mount shallow patch panels at 28.6cm and rear-mount deep compute at 104.8cm in the same enclosure. Mixed-depth deployments don't require a second rack.
- 270° Door Opening Angle: Doors swing a full 270°, folding flat against the rack side rather than projecting into the aisle. In tight rows with limited aisle clearance, this eliminates the hazard of a door obstructing cross-aisle traffic during maintenance windows.
- Keyed Side Panels with Independent Locks: Both side panels lock independently, separate from the front and rear door locks. That means you can grant cable contractors access to the rear without exposing the sides — useful in co-location environments or shared server rooms where role-based physical access matters.
- Adjustable Leveling Feet: Factory-included leveling feet handle uneven raised-floor tiles or concrete slabs without shims. This also lets you fine-tune the enclosure height for cable tray alignment during installation.
- Freestanding Design with Side Panels Included: Ships as a self-contained enclosure — no need to source side panels separately. The included panels enclose airflow pathways for hot/cold aisle containment compatibility and provide the structural rigidity that open-frame racks lack.
Integration and Compatibility
The AR3350B2 follows standard EIA-310 19-inch rail spacing, so it accepts any rack-mount equipment built to that standard — servers, switches, firewalls, UPS units, KVM drawers, and patch panels. The 750mm width is compatible with APC's NetShelter SX accessory ecosystem: blanking panels, cable management arms, horizontal and vertical cable managers, and rack-mount UPS units. Side-by-side installation with other 750mm NetShelter SX enclosures supports bolt-together row configurations for physical stability without additional floor anchoring hardware.
For thermal management, the 1200mm depth and 750mm width create sufficient internal volume for hot/cold aisle containment accessories. The enclosure is compatible with APC's airflow management blanking panels and rear-door heat exchangers if your rack power density requires active exhaust. Plan cable entry through the top or bottom knockouts — the Gen 2 frame includes multiple entry points for overhead and under-floor cable routing common in structured cabling installations.
Frequently Asked Questions
Q: What is the maximum equipment mounting depth supported by the AR3350B2?
A: The AR3350B2 supports a maximum mounting depth of 104.8cm (approximately 41.3 inches), with a minimum of 28.6cm. The adjustable rails accommodate shallow patch panels through full-depth enterprise servers in the same enclosure.
Q: Does the AR3350B2 ship with side panels?
A: Yes. Side panels are included and ship with the enclosure. Both panels are independently keyed and lockable.
Q: What is the external footprint of the AR3350B2?
A: The enclosure is 750mm wide × 1200mm deep × 1991mm tall. Plan for packaged shipping dimensions of 853mm wide × 1323mm deep × 2128mm tall when coordinating freight and door clearances.
Q: Is the AR3350B2 compatible with other NetShelter SX accessories?
A: The AR3350B2 uses standard EIA-310 19-inch mounting rails and fits within the NetShelter SX 750mm accessory family — including APC blanking panels, cable managers, and airflow containment accessories designed for that footprint.
Q: Can the AR3350B2 doors be removed for installation access?
A: The 270° door swing allows doors to fold flat alongside the enclosure during equipment installation, and NetShelter SX doors are designed to be removable — useful when rolling fully loaded racks through narrow doorways.
The AR3350B2 is the enclosure I reach for when a deployment has full-depth compute — the 104.8cm maximum mounting depth means you're not fighting cable bend radius on the rear of a deep PowerEdge or UCS chassis. The 1200mm depth isn't just about fitting long servers; it also gives your cable management arms room to operate without compressing against a rear door.
Technical Highlights:
- 42U Capacity: Forty-two rack units in a 1991mm-tall frame is the standard density sweet spot for a mixed server/networking stack — you get enough vertical space to avoid splitting a logical pod across two enclosures, which keeps cabling cleaner and power distribution simpler.
- 750mm Width: The wider 750mm footprint (vs. 600mm) gives side clearance that matters when you're running horizontal cable managers on every 1U — cables have somewhere to go without stacking up at the rear corners and blocking airflow.
- 270° Door Swing: In rows with 900mm cold aisles, a door that folds flat against the rack side rather than projecting outward is the difference between a safe maintenance window and a trip hazard. The 270° spec on the AR3350B2 is the right call for any aisle-constrained environment.
Deployment Considerations:
- The packaged dimensions are 853mm W × 1323mm D × 2128mm H — verify freight elevator and doorway clearances before scheduling delivery. A fully assembled 42U enclosure will not fit through a standard 36-inch doorway on its side.
- Side panel key locks are independent of the front/rear door locks. If your security policy requires a single master key for the enclosure, plan your key management accordingly — these are separate cylinders.
The AR3350B2 is the right enclosure for enterprise edge deployments and small-to-midsize data center rows where you need full-depth server compatibility, physical access control out of the box, and a proven accessory ecosystem without sourcing side panels separately.
