Middle Atlantic CUS RACKSHLF2SP Anod 20.5 - RSH4A2XX

Middle Atlantic RSH4A2XX 2U Steel Rack Shelf — 20.5-Inch Depth

Overview

The Middle Atlantic RSH4A2XX is a 2U steel rack shelf designed for integrators who need a reliable, fixed-depth platform inside a standard 19-inch equipment rack. At 20.5 inches (521mm) deep and 482.6mm wide, it occupies exactly two rack units of vertical space — enough clearance for mid-depth security appliances, NVR chassis, media converters, or auxiliary networking gear without wasting valuable U-space on a shelf that's oversized for the job.

Built from steel with a black finish, the RSH4A2XX is a straightforward, no-compromise component for rack builds where you need a solid horizontal surface rather than a slide-out or vented shelf. If you're specifying a Middle Atlantic rack enclosure or retrofit kit, this shelf drops in as a native fit.

Key Features

• 2U rack capacity: Takes up two rack units vertically — practical for equipment that doesn't need three or four U of clearance. Keeps your rack layout tight and leaves room for other components in the same enclosure.
• 20.5-inch (521mm) depth: Matches the internal depth of most Middle Atlantic and standard-depth 19-inch rack enclosures. Equipment up to 20 inches deep sits fully supported without overhanging the shelf edge.
• 482.6mm width: Standard 19-inch EIA rack width. Installs directly into any rack with standard rail spacing — no adapters, no shimming.
• 89mm height: The physical height of the shelf assembly at 2U. Verify your equipment's actual front-panel height before ordering if clearance above or below is tight.
• Steel construction, black finish: Steel provides a firm, non-flexing platform for heavier components. The black anodized finish blends with standard rack hardware and resists surface wear in working equipment rooms.
• Single-unit pack: Ships as one shelf. For multi-shelf rack builds — common in NVR and recording server deployments — order the quantity you need per rack position.

Integration and Compatibility

The RSH4A2XX is compatible with standard EIA 19-inch rack frames, including open-frame two-post and four-post racks, as well as enclosed Middle Atlantic rack cabinets. It suits any application where you need a fixed platform for non-rackable equipment: access control servers, PoE injectors, fiber patch panels, or power conditioning units that lack their own rack ears.

For deployments combining NVRs, PoE switches, and supporting hardware in a single rack, this shelf provides the horizontal real estate to stage components cleanly before final mounting. Pair it with a cable management panel above or below to keep wiring organized in the same enclosure.

Frequently Asked Questions

Q: What rack size does the RSH4A2XX fit?

A: The RSH4A2XX is built to standard 19-inch EIA rack dimensions at 482.6mm wide, compatible with any two-post or four-post 19-inch rack frame or enclosed cabinet.

Q: How much vertical space does the RSH4A2XX occupy?

A: It occupies 2U (two rack units) of vertical space, with a physical height of 89mm.

Q: What is the depth of the RSH4A2XX?

A: The shelf is 521mm (20.5 inches) deep, accommodating most mid-depth rack-mounted or non-rackable equipment.

Q: What material is the RSH4A2XX made from?

A: It is constructed from steel with a black finish, providing a rigid, durable platform for equipment inside the rack.

Q: Is the RSH4A2XX compatible with Middle Atlantic rack enclosures?

A: Yes. The RSH4A2XX is designed to integrate with Middle Atlantic rack systems and any standard 19-inch EIA-compatible enclosure.

Marty Allison

The RSH4A2XX is one of those components that seems trivial until you're standing in front of a half-built rack trying to figure out where to put the access controller or the fiber media converter that didn't come with rack ears. At 521mm deep and a true 2U height of 89mm, it gives you a clean, stable platform that doesn't flex under load — which matters more than it sounds when the shelf is holding something you'd rather not have sliding around during a power event or a patch run.

Technical Highlights:

• 521mm (20.5") depth: Covers the interior depth of most standard-depth Middle Atlantic enclosures flush, so equipment doesn't cantilever past the shelf edge or hang unsupported at the rear.
• 2U / 89mm height: Two rack units gives enough vertical clearance for most 1U appliances plus their connector profiles — useful when you're stacking dense gear and can't afford to burn 3U on a single shelf.
• Steel construction: Unlike aluminum shelves that can bow under heavier chassis, steel holds its shape across the full 482.6mm width. No mid-span sag on a loaded shelf.

Deployment Considerations:

• The 521mm depth is sized for Middle Atlantic enclosures specifically — measure your rack's internal depth before ordering if you're installing into a third-party cabinet, since some compact rack enclosures run 450–500mm internally and this shelf won't sit flush.
• No load rating is published in the available evidence — if you're planning to place heavy UPS units or dense storage appliances on this shelf, verify the rated capacity directly with Middle Atlantic before specifying it in a load-sensitive installation.

For a security integrator building out a mixed NVR-and-access-control rack in a telecom closet or server room, the RSH4A2XX is the right call when you need a fixed, full-depth platform that installs in minutes and stays in place for years.