Eaton Tripp Lite SR42UBMDEXPNDNR3 — 42U Mid-Depth Open Frame Expansion Rack

Introducing the Eaton Tripp Lite SR42UBMDEXPNDNR3, a member of the SmartRack family crafted for scalable, high-density IT environments. This mid-depth open frame expansion rack is designed to maximize accessibility, airflow, and flexibility in data centers, server rooms, and network closets where space is at a premium. With a 42U rack height and a 36" (927 mm) depth, it sits between compact enclosures and full-depth cabinets, offering an ideal balance for organizations seeking easier front-to-back cable management, simplified equipment installation, and straightforward expansion without the constraints of a fully enclosed enclosure. The expansion variant is delivered without sides, doors or a roof, giving technicians unhindered access to every mounting rail and backplane, which translates into faster setup, more efficient maintenance, and improved airflow for cooling in mid-depth deployments.

• Mid-depth, optimized for airflow and cable routing: The SR42UBMDEXPNDNR3 provides a practical 36" (927 mm) depth, placing equipment at an accessible front-to-back footprint that supports dense cabling and active components while promoting efficient cooling. This depth is ideal for organizations that need room to maneuver patch panels, switches, and servers without the constraints of a deeper enclosure, enabling cleaner cable management and easier service access.
• High capacity for versatile rack-mount equipment: Offering 42U of mounting space, this expansion rack can hold a substantial amount of standard 19-inch equipment up to 3000 lb. It’s well suited for a mix of rack-mount servers, storage devices, network switches, UPS units, patch panels, and PDUs. The expanded capacity supports growth as workloads evolve, reducing the need for frequent rack replacements and streamlining lifecycle planning.
• Open-frame expansion design for rapid deployment: Delivered without sides, doors or a roof, the SR42UBMDEXPNDNR3 provides unrestricted access to all sides of the equipment, making installation, upgrades, and routine maintenance faster and simpler. This design is particularly advantageous in spaces where quick changes and modular reconfigurations are common, and where teams benefit from unhindered visibility for cable management and airflow optimization.
• Four-post stability with standard 19" compatibility: Built as a robust four-post open frame, this rack supports a wide range of standard 19-inch equipment and accessories. The four-post configuration ensures solid mounting and even weight distribution, enabling secure installation of heavy components and reliable long-term operation in busy data centers and IT rooms.
• Part of the trusted SmartRack family for scalable IT infrastructure: As an expansion variant within Eaton Tripp Lite’s SmartRack series, this rack is designed to integrate smoothly with other SmartRack components and accessories. Its open-frame, mid-depth design provides a flexible foundation for evolving network topologies, making it easier to plan for future growth, cabling schemes, and equipment migrations without being boxed into a fixed enclosure.

Technical Details of Eaton Tripp Lite SR42UBMDEXPNDNR3

• Model: SR42UBMDEXPNDNR3
• Depth: 36 inches (927 mm)
• Height: 42U
• Configuration: 4-post mid-depth open frame expansion rack
• Sides/Doors/Roof: None (expansion version)
• Weight capacity: Up to 3000 lb (standard 19-inch equipment)
• Mounting standard: 19-inch rack equipment compatibility

How to Install Eaton Tripp Lite SR42UBMDEXPNDNR3

• Plan your layout by measuring the available floor space and ensuring the area can support the rack plus connected equipment and cooling requirements.
• Unpack the rack and verify the contents against the packing list. Inspect for any shipping damage before assembly.
• Prepare mounting rails appropriate for your 19-inch equipment. Attach the rails to the four posts at the correct U-height to align with your devices.
• With the rails secured, begin installing equipment from top to bottom, securing each device with standard rack screws or mounting hardware designed for 19-inch equipment. Ensure weight is distributed evenly to maintain stability.
• Route cables cleanly using available cable management accessories. Keep power and data cables organized to promote airflow and simplify future maintenance.
• Perform a final inspection to verify that all devices are firmly mounted, cables are routed correctly, and that there is unobstructed access to the equipment for servicing and upgrades.

Frequently asked questions

• Q: What is the depth and height of this rack? A: It features a mid-depth design of 36 inches (927 mm) and a total height of 42U.
• Q: How much weight can the SR42UBMDEXPNDNR3 support? A: It can accommodate up to 3000 lb of standard 19-inch equipment.
• Q: Are there sides, doors, or a roof included? A: No. This is an expansion version delivered without sides, doors, or a roof to provide open access for quick installation and maintenance.
• Q: Is this rack compatible with standard 19-inch equipment? A: Yes, the rack is designed to fit standard 19-inch rack-mount equipment and accessories.
• Q: In what environments is the SR42UBMDEXPNDNR3 best used? A: It is ideal for data centers, server rooms, and network closets that require a scalable, open-frame mid-depth rack with high load capacity and easy access for cabling and maintenance.