APC by Schneider Electric AR3357 48U 750mm Wide x 1200mm Deep Server Rack Enclosure
Overview
The AR3357 is APC by Schneider Electric's NetShelter SX 48U enclosure in the 750mm wide by 1200mm deep footprint — the workhorse configuration for high-density compute, networking, and surveillance infrastructure in enterprise data centers, server rooms, and security operations centers. At 88.90 inches tall and 47.24 inches deep, this cabinet gives you 48 usable rack units with a maximum mounting depth of 41.26 inches, meaning full-depth servers, NVR appliances, and dense patch panels all fit without compromise. If you're speccing a network video recorder stack or a converged security infrastructure alongside your IT gear, the AR3357 is purpose-built for that kind of mixed-density load in a single enclosure.
Built on APC's established NetShelter SX line, this enclosure carries TAA and BAA compliance out of the box — relevant for federal, state, and government-funded projects where procurement regulations apply. It also meets UL 2416, UL 60950-1, and EIA-310E standards, which matter for insurance, facilities sign-off, and co-location acceptance.
Key Features
- 48U Capacity: Forty-eight rack units in a single enclosure means you can consolidate an entire surveillance head-end — NVRs, PoE switches, patch panels, and UPS — without splitting across multiple cabinets and the cabling complexity that follows.
- 2,250 lb Static / 3,750 lb Dynamic Load Rating: The permanent load capacity of 2,250 lbs handles the heaviest enterprise server and storage configurations; the 3,750 lb dynamic rating means the cabinet can be safely rolled into position fully loaded. For dense UPS and power distribution builds, this load rating removes the guesswork on structural limits.
- 41.26-Inch Maximum Mounting Depth: Full-depth equipment fits without door interference. The adjustable mounting rails slide from 10.31 inches minimum to 41.26 inches maximum, accommodating everything from shallow patch panels to 1200mm-depth blade chassis in the same cabinet without adapters.
- 14-Gauge Mounting Rails: Heavier gauge on the rails — where structural load actually transfers — means the AR3357 holds its rated capacity without flex or deformation under long-term static load. Thinner-gauge rails are where budget cabinets fail first.
- 19-Inch EIA-310E Rack Width: Industry-standard 19-inch mounting compatibility means any rackmount equipment — servers, switches, KVM drawers, blanking panels — drops straight in without adapter kits.
- 750mm Wide Footprint: The 750mm width (versus the narrower 600mm variant) provides side clearance for cable management arms, vertical PDUs, and airflow baffles without crowding. If you're running structured cabling alongside compute, the extra width is meaningful.
- 1200mm Depth: Designed for full-depth equipment on both front and rear mounting positions simultaneously. Run active network gear at the front and passive patch infrastructure at the rear without compromising access to either.
- TAA and BAA Compliance: The AR3357 satisfies Trade Agreements Act and Buy American Act requirements, making it procurable on GSA schedules and eligible for federal and public-sector bids where domestic sourcing rules apply.
- UL 2416 / UL 60950-1 / EIA-310E Certified: Third-party safety certifications mean facilities managers, electricians, and co-location operators can accept this cabinet without variance requests or additional inspection.
- 16-Gauge Front and Rear Doors: Heavier door construction resists warping under repeated access cycles and provides a secure, consistent latch — important in high-traffic NOC and SOC environments where cabinets are opened dozens of times per shift.
Integration and Compatibility
The AR3357 integrates with APC's full NetShelter accessory ecosystem — side panels, blanking panels, roof fan trays, seismic kits, and cable management channels all mount to this enclosure without modification. The 19-inch EIA-310E rail pattern ensures compatibility with rackmount equipment from any manufacturer. For physical network switch infrastructure or surveillance-specific builds including NVR stacks, the 1200mm depth accommodates even the deepest switch chassis with clearance for rear-exit cabling. The enclosure ships in a 94.49 x 33.50 x 52.52 inch package weighing 444.94 lbs — plan for lift equipment and at minimum two people for positioning. The AR3357 carries a 5-year repair or replace warranty from APC by Schneider Electric.
Frequently Asked Questions
Q: Is the AR3357 TAA and BAA compliant?
A: Yes. The AR3357 carries both TAA (Trade Agreements Act) and BAA (Buy American Act) compliance, making it eligible for GSA schedule procurement and federal/public-sector projects with domestic sourcing requirements.
Q: What is the maximum equipment depth the AR3357 can accommodate?
A: The adjustable mounting rails support a maximum mounting depth of 41.26 inches (104.8 cm) and a minimum of 10.31 inches (26.19 cm), accommodating shallow patch panels through full-depth blade servers and NVR appliances.
Q: What is the load capacity of the AR3357?
A: The AR3357 supports a permanent (static) load of 2,250 lbs and a dynamic (rolling) load of 3,750 lbs, meaning it can be fully loaded and repositioned without unracking equipment.
Q: What compliance certifications does the AR3357 carry?
A: The AR3357 meets UL 2416, UL 60950-1, and EIA-310E standards, in addition to TAA and BAA compliance.
Q: What warranty does the AR3357 carry?
A: APC by Schneider Electric provides a 5-year repair or replace warranty on the AR3357.
Q: Can the AR3357 be used in government or federal procurement?
A: Yes. TAA and BAA compliance means the AR3357 can be specified on GSA schedules and in federal bids subject to domestic sourcing rules without additional waivers.
The AR3357 is the enclosure I reach for when a project has real density requirements and no tolerance for structural surprises — the 2,250 lb permanent load rating and 3,750 lb dynamic capacity are the numbers that separate this cabinet from lighter-duty alternatives, and they matter when you're staging a full NVR and switching stack before rolling it into a finished server room.
Technical Highlights:
- Adjustable Rail Depth (10.31–41.26 in): The 30-inch adjustment range means you're not buying a second cabinet because your shallowest panel and your deepest appliance can't share the same enclosure — both mount cleanly at their natural depth.
- 14-Gauge Mounting Rails: Rails are where static load actually lives; heavier gauge here prevents the creep and sag that show up after 18 months under a fully populated UPS-and-switch build.
- TAA/BAA Compliance: For public-sector security integrators, this isn't optional — it's the difference between a bid-eligible spec and a procurement red flag. The AR3357 has it verified on the SKU.
Deployment Considerations:
- At 408.85 lbs empty and packaged at 444.94 lbs in a 94.49-inch-tall carton, this enclosure requires a pallet jack or freight lift for receiving — plan dock access and a two-person installation crew before delivery.
- The 750mm width is the right call for builds that include vertical cable managers or side-exit PDUs, but verify your raised floor tile spacing before committing — 750mm cabinets require wider aisle clearance than 600mm configurations.
For a converged security operations center build — NVR appliances, PoE switching, fiber patch infrastructure, and in-rack UPS all in one cabinet — the AR3357's load rating, depth clearance, and TAA compliance make it the defensible specification for both the facilities and procurement teams.
