APC by Schneider Electric AR3157W 48U 750mm Wide Open Frame Server Rack Enclosure
Overview
The APC by Schneider Electric AR3157W is a 48U, 750mm-wide rack enclosure from the NetShelter SX line — a go-to chassis for data centers, server rooms, and enterprise network closets where structural integrity, airflow management, and long-term scalability matter. Finished in white, the AR3157W suits environments where rack color is specified by facilities or aesthetic standards, and its 42.1-inch (107 cm) depth accommodates virtually every 2-post or 4-post device in a modern stack. If you're building out a structured network infrastructure rack for a mid-to-large enterprise or integrating heavy security and compute hardware, this enclosure is sized to handle the load without compromise.
APC's NetShelter SX series has long been the reference standard for APC by Schneider Electric rack infrastructure — and the AR3157W carries that forward with a static load rating of 3,750 lb (1,701 kg) and a dynamic (rolling) load rating of 2,250 lb (1,020.6 kg). That's not a spec to skip past: it means you can fully populate this enclosure with dense blade servers, high-port-count switches, or security appliances and roll it across a raised floor without worrying about chassis flex or tipping. For large-scale NVR and storage deployments where multiple 2U or 4U appliances stack up quickly, that dynamic rating is your floor-move safety margin.
Key Features
- 48U Rack Height (88.9 in / 225.8 cm): 48U gives you 14 more rack units than a standard 42U enclosure — meaningful when you're consolidating patch panels, power distribution, servers, and security appliances into a single chassis. Fewer enclosures on the floor means fewer cable runs and simpler airflow containment.
- 750mm (29.5 in) Width: The 750mm form factor accommodates side-mounted cable managers and vertical PDUs without encroaching on adjacent racks — a practical advantage in tight rows where 600mm racks force cable routing compromises.
- 42.1-inch (107 cm) Usable Depth: With a maximum mounting depth of 36.02 inches (91.49 cm) and a minimum of 10.31 inches (26.19 cm), the AR3157W handles everything from shallow patch panels to deep blade chassis in the same enclosure. You're not buying a second rack because your newest compute node is 2 inches too long.
- 3,750 lb Static Load Capacity: At 1,701 kg rated static, this enclosure won't be the weak point in a fully populated high-density build. Dense storage arrays, blade systems, and stacked security appliances all fit within that envelope without requiring load balancing across multiple racks.
- 2,250 lb Dynamic Load Rating: Rolling a fully loaded rack is a routine reality during data center buildouts and retrofits. The 2,250 lb dynamic rating means the AR3157W handles floor moves with a real equipment load — not just an empty chassis test figure.
- 19-inch Rack Width (EIA Standard): Standard 19-inch rail spacing means every EIA-310-compliant device — switches, servers, PDUs, KVMs, patch panels — installs without adapters or workarounds. No compatibility guesswork.
- White Finish: Specified for environments where rack color is part of a facility standard (clean rooms, broadcast suites, healthcare IT rooms). The finish is consistent across the NetShelter SX line, so white AR3157W units integrate cleanly alongside other white NetShelter enclosures in the same row.
- 5-Year Manufacturer Warranty: APC backs the AR3157W with a 5-year manufacturer warranty — longer than most competing enclosures in this class. For a chassis you're not replacing for a decade, that coverage matters at the procurement level.
Integration and Compatibility
The AR3157W is designed to integrate with APC's broader NetShelter ecosystem: blanking panels, cable managers, vertical PDUs, and hot/cold aisle containment accessories are all sized for the SX chassis. The 750mm width and standard 19-inch rails ensure compatibility with third-party power distribution units, cable management arms, and toolless mounting hardware from major vendors. If you're building a hot-aisle containment row, the AR3157W's depth (42.1 in) aligns with standard containment corridor dimensions. For security integrators deploying NVRs, storage arrays, or access control servers in a rack format, the generous mounting depth range (10.31–36.02 inches) means shallow 1U access control appliances and deep 4U JBOD storage nodes both mount without shimming or custom rail kits. Consult a rack accessories guide to ensure your PDU and cable management selections are dimensioned for a 750mm-wide, 48U chassis before ordering.
Frequently Asked Questions
Q: What is the maximum equipment weight the AR3157W can support when stationary?
A: The AR3157W has a static load rating of 3,750 lb (1,701 kg), meaning it can support that weight when the rack is not being moved. This covers virtually any fully populated enterprise rack configuration.
Q: Can the AR3157W be moved when fully loaded with equipment?
A: Yes. The dynamic (rolling) load rating is 2,250 lb (1,020.6 kg), so the enclosure is rated for floor moves under a substantial equipment load — relevant during data center buildouts or reconfiguration projects.
Q: What is the mounting depth range inside the AR3157W?
A: The AR3157W supports a minimum mounting depth of 10.31 inches (26.19 cm) and a maximum of 36.02 inches (91.49 cm). This range accommodates shallow patch panels and deep blade or storage chassis in the same enclosure.
Q: What rack unit capacity does the AR3157W provide?
A: The AR3157W provides 48U of usable rack space — 14U more than a standard 42U enclosure. The overall enclosure height is 88.9 inches (225.8 cm).
Q: What warranty does the AR3157W carry?
A: APC backs the AR3157W with a 5-year manufacturer warranty.
Q: Is the AR3157W compatible with standard 19-inch rack equipment?
A: Yes. The AR3157W uses standard EIA-310 19-inch rail spacing, so all compliant servers, switches, PDUs, patch panels, and other rack-mount devices install without adapters.
The AR3157W is the enclosure I spec when a project needs headroom — 48U in a 750mm-wide footprint with a 3,750 lb static load rating means you're not coming back in 18 months to add a second rack because the first one is full or overloaded. That depth range (10.31 to 36.02 inches usable) is particularly useful on mixed-hardware security and IT builds where you're mounting everything from 1U access control servers to 4U NVR appliances in the same chassis.
Technical Highlights:
- 48U Capacity: 48 rack units lets you consolidate patch, power, compute, and security appliances — the extra 14U over a standard 42U chassis is often the difference between one rack and two on a mid-size project.
- 3,750 lb Static / 2,250 lb Dynamic Load: The dynamic rating is the one that matters during buildouts — 2,250 lb rolling means you move the loaded rack to its final position without unloading it first, which cuts installation time on tight schedules.
- 36.02-inch Maximum Mounting Depth: Deep enough for virtually every current-gen blade or storage node. The 10.31-inch minimum means shallow 1U patch panels and cable organizers mount flush without custom rail adapters.
Deployment Considerations:
- At 88.9 inches tall with a 94.5-inch packaged height, verify ceiling clearance and door frame dimensions before delivery — this unit will not fit through a standard 80-inch door frame without tilting, which requires planning the floor path in advance.
- The 750mm width saves space for side-mounted vertical cable managers, but confirm your row spacing accounts for the wider footprint if you're retrofitting into an existing 600mm-standard row.
The AR3157W is the right call for enterprise security operations centers, mid-to-large data center rows, and any deployment where you're consolidating NVR storage, network switching, and access control compute into a single high-capacity chassis that won't need to be replaced as the system scales.
