Vertiv CMR-45U12-W-SQM6 45U Open Frame 2-Post Rack — Winter White, 12" Depth, M6 Square-Hole
Overview
The Vertiv CMR-45U12-W-SQM6 is a 45U open frame rack built for data centers, server rooms, and structured cabling environments where a clean, accessible, low-footprint mounting solution matters. At 12 inches of usable depth with M6 square-hole (3/8" sq.) mounting rails, it handles standard 19-inch rackmount equipment without the bulk of a full enclosure cabinet — and the Winter White finish is a deliberate choice for environments where aesthetics or facility color standards matter, such as healthcare, education, and open office deployments.
Open frame racks like the CMR-45U12-W-SQM6 are the right infrastructure choice when airflow, cable access, and rapid equipment swap are priorities. Without side panels or doors, technicians can reach gear from any angle — a real advantage in tight IDF closets or dense security head-end rooms where you're routing camera feeds, NVR outputs, and patch panels in the same vertical footprint. The Vertiv CMR family spans multiple height and depth configurations (45U, 52U, 59U heights; 6", 10.5", 12", 16.25" depths), so this SKU sits at the most common mid-range intersection: tall enough for a full AV or security rack build, shallow enough for wall-adjacent placement.
Key Features
- 45U Capacity: 45 rack units gives you room for a full security head-end stack — NVRs, PoE switches, patch panels, UPS, and KVM — without running out of vertical space mid-project. At 1.75" per U, that's 78.75" of usable mounting height in a single column.
- 12" Rail Depth: The 12-inch depth clears most 1U and 2U rackmount appliances (NVRs, switches, patch panels) without protruding excessively from the wall. Shallower than a full-depth cabinet, it suits IDF closets, security operations alcoves, and structured cabling rooms where floor space is constrained.
- M6 Square-Hole (3/8" sq.) Mounting: The SQM6 designation means standard M6 cage nuts and screws — the same hardware used in the vast majority of enterprise rackmount gear. No adapter plates, no proprietary fasteners. Compatible with PoE network switches, NVRs, patch panels, and virtually all standard 19-inch equipment out of the box.
- Winter White Finish: The -W color designation isn't cosmetic noise. White open frame racks are specified in healthcare facilities, clean rooms, open office server closets, and education environments where a black rack would stand out against white ceilings and walls. If your facility standard calls for white infrastructure, this is the correct SKU; the same CMR family is available in black if your environment calls for it.
- Open Frame Architecture: No doors, no side panels — cable runs are fully accessible from front, rear, and sides at every U position. This matters in security and AV installations where you're managing high cable counts: HDMI, Cat6, fiber, and power all need to route cleanly without fighting an enclosure.
- Multi-Configuration Family: The CMR line supports three height options (45U, 52U, 59U) and four depth options (6", 10.5", 12", 16.25"), which means if this project grows or a future site needs a different form factor, you're working within the same Vertiv product ecosystem — consistent hardware, consistent mounting patterns, consistent spare parts.
Integration and Compatibility
The CMR-45U12-W-SQM6 uses M6 square-hole (3/8" sq.) rails, which accept standard M6 cage nuts — the default hardware for the overwhelming majority of 19-inch rackmount equipment. If you're building a network video recorder stack or a full security head-end, every major NVR, managed PoE switch, and patch panel vendor ships with M6-compatible mounting ears. No adapter kits are required for standard deployments.
For installations that mix rack-mounted security hardware with traditional IT infrastructure, the open frame format integrates cleanly alongside enclosed cabinets — useful when expanding an existing server room with a dedicated security rack without displacing existing enclosed-cabinet infrastructure. The Winter White color also coordinates with white-finish cable management trays and horizontal managers if your structured cabling design follows a consistent color-coding scheme. See the broader Vertiv infrastructure catalog for compatible power distribution, cable management, and UPS options within the same product family.
If you're specifying this rack for a security operations environment, pair it with a rack-mounted UPS in the lower U positions to protect NVRs and network equipment from power interruptions — a common deployment pattern in surveillance head-end rooms where recording continuity is non-negotiable. For guidance on planning your rack layout and power budget, the surveillance system planning guide covers head-end rack design in detail.
Frequently Asked Questions
Q: What does "SQM6" mean in the CMR-45U12-W-SQM6 part number?
A: SQM6 indicates the rail mounting style: 3/8-inch square holes designed for standard M6 cage nuts. This is the most common rack mounting standard and is compatible with virtually all 19-inch rackmount equipment from major vendors.
Q: What is the usable depth of the CMR-45U12-W-SQM6?
A: This specific SKU has 12-inch rail depth, appropriate for 1U and 2U appliances including NVRs, managed switches, and patch panels. The CMR family also offers 6", 10.5", and 16.25" depth variants for different equipment profiles.
Q: Why specify a white rack instead of black?
A: The Winter White (-W) finish is typically specified for healthcare, education, and open-office environments where facility standards or aesthetics require white infrastructure. It is functionally identical to the black CMR variant — the color choice is environment-driven.
Q: Can the CMR-45U12-W-SQM6 accommodate standard rackmount security equipment like NVRs and PoE switches?
A: Yes. M6 square-hole mounting (3/8" sq.) is the standard for commercial rackmount equipment. NVRs, PoE switches, patch panels, and KVM units from all major vendors mount directly without adapter hardware.
Q: Is the CMR-45U12-W-SQM6 an enclosed cabinet or an open frame rack?
A: It is an open frame rack — no doors, no side panels. This maximizes airflow and cable accessibility from all sides, which is a common preference in security head-end and AV rack installations. If you need an enclosed cabinet for the same U count, Vertiv offers enclosed alternatives in the same product line.
The CMR-45U12-W-SQM6 is one I'd reach for specifically when the rack location is visible — an open IDF closet, a security operations alcove, or a healthcare nurses' station where Winter White infrastructure blends with the environment rather than calling attention to itself. The M6 square-hole rail (3/8" sq.) is the right call for any mixed-vendor build: no cage nut adapters, no workarounds, just standard M6 hardware that every major NVR and switch manufacturer supports natively.
Technical Highlights:
- 45U Height: At 78.75" of usable rack space, this accommodates a complete security head-end — NVR, PoE switch stack, patch panel, and rack UPS — in a single column without stacking a second rack or overloading a smaller unit.
- 12" Rail Depth: Shallow enough for wall-adjacent placement in tight IDF closets, deep enough to clear standard 1U/2U appliances. The CMR family's 6" variant exists for pure patch-panel walls; 12" is the right pick when you're mixing active and passive equipment.
- M6 Square-Hole Mounting: SQM6 rails accept off-the-shelf M6 cage nuts, which ship with virtually every commercial rackmount device. No proprietary fasteners means no sourcing delays when you need to expand the rack later.
Deployment Considerations:
- Open frame means no passive cooling benefit from an enclosure — plan your cable management carefully to avoid blocking airflow between densely stacked active devices, particularly 2U NVRs with rear-exhaust fans.
- The CMR family spans 45U, 52U, and 59U heights: if there's any chance the rack will need to grow, specify the 52U now rather than adding a second rack later — the height delta is modest but the cable management savings are real.
This rack is a solid fit for a security head-end in a healthcare or education facility where the rack sits in an open or semi-open space and white infrastructure is either required or preferred — the Winter White finish and M6 compatibility make the CMR-45U12-W-SQM6 a straightforward specification decision in that context.
