Middle Atlantic 3SP Flat Econo Blank - FEB3

Middle Atlantic FEB3 3U Flat Blank Rack Panel

Overview

The Middle Atlantic FEB3 is a 3-rack-unit flat blank panel designed to fill unused rack space in 19-inch equipment enclosures. At just 0.08 inches deep, it sits flush against your rack's front face — no protruding edges to snag cables or obstruct airflow management. If you're building out an AV or security equipment rack and need a clean, professional finish on open bays, the FEB3 is the straightforward answer. It ships as a single panel and installs in minutes with two mounting points, requiring no tools beyond a screwdriver.

Constructed from steel with a flat black powder coat finish, the FEB3 matches the interior aesthetic of most commercial rack enclosures without drawing attention. This is the kind of component that makes a rack installation look deliberate rather than provisional — and in data center, AV, and security control room environments, that matters to the integrators who sign off on the job.

Key Features

• 3 Rack Units (5.25 in tall): Covers exactly 3U of open bay — useful when you're reserving space for future equipment expansion or need to block a gap between components to prevent hot air recirculation. Three units is one of the most common gap sizes in mixed-equipment racks, so this size fits a wide range of configurations.
• 19-Inch Standard Width: Fits any EIA-standard 19-inch rack enclosure — compatible across Middle Atlantic, Panduit, Belden, Rittal, APC, and virtually every mainstream rack chassis used in commercial security and AV installations. No adapters, no modifications.
• 0.08-Inch Profile (Flat Style): The flat form factor means the panel doesn't extend beyond the rack rail plane, keeping the front face of the enclosure uniform. Vented or deep-flanged blanks can create airflow irregularities; this flat panel avoids that problem in tightly packed racks.
• Steel Construction: Steel blanks hold up to the physical stress of rack environments — being brushed against cable management arms, periodic equipment swap-outs, and the vibration present in some industrial or wall-mounted rack deployments. Plastic panels crack; this one won't.
• Flat Black Powder Coat Finish: The powder coat finish is durable, scratch-resistant, and color-matched to the interior of most commercial rack cabinets. It won't chip under normal use the way painted finishes can, so the rack looks consistent over the life of the installation.
• Two Mounting Points: Standard dual-screw mount means the panel sits securely without flexing or rattling — relevant in any mobile or wall-mounted rack application where vibration is a factor.
• Single-Panel Pack (Qty 1): Sold individually, so you can order exactly the quantity your rack layout requires without surplus. If you're filling multiple gaps, order by count.

Integration & Compatibility

The FEB3 is dimensionally compatible with any EIA/ECA-310 standard 19-inch rack enclosure. This covers the full range of Middle Atlantic rack products as well as third-party enclosures from major manufacturers. It installs using the same rack screws (10-32 or 12-24 depending on your rack rail) used by every other panel and device in the enclosure — no proprietary fasteners.

For integrators building out rack accessory packages for surveillance control rooms, security operations centers, or AV equipment rooms, blanking panels like the FEB3 are a required finish component. Open bays in a rack create airflow bypass paths that push warm air from equipment exhaust back through adjacent gear — blanking every unused U prevents this and is standard practice per most data center and AV rack design guidelines. Pair with a compatible rack enclosure and structured cable management accessories for a complete, code-compliant installation.

If you're planning rack layout for a multi-camera NVR or video management server deployment, accounting for blank panel quantity during the design phase avoids a return trip to source them after the rack is populated.

What's in the Box

• 1x Middle Atlantic FEB3 3U Flat Blank Panel

Frequently Asked Questions

Q: What rack unit size is the FEB3, and how tall is it in inches?

A: The FEB3 covers 3 rack units (3U), which corresponds to 5.25 inches in height — the EIA standard height for 3U of rack space.

Q: Will the FEB3 fit a standard 19-inch rack?

A: Yes. The FEB3 is 19 inches wide and is designed for any EIA/ECA-310 standard 19-inch rack enclosure, including Middle Atlantic and third-party rack cabinets.

Q: How deep is the FEB3 panel?

A: The FEB3 is 0.08 inches deep (approximately 2mm). It sits essentially flush with the rack rail face, which keeps the front of the enclosure even and unobstructed.

Q: What material and finish is the FEB3?

A: The FEB3 is steel with a flat black powder coat finish — durable, scratch-resistant, and color-matched to most commercial rack enclosures.

Q: Is the FEB3 sold in multi-packs or individually?

A: The FEB3 is sold as a single panel (quantity 1). Order the number of panels your rack layout requires.

Q: Why should I use blank panels in my rack instead of leaving bays open?

A: Open rack bays create airflow bypass paths — warm exhaust air from equipment can recirculate through open gaps rather than being exhausted out of the enclosure. Blanking panels like the FEB3 force airflow through equipment and out the proper exhaust path, which is standard practice in commercial rack installations and data center guidelines.

Marty Allison

The FEB3 is a component that shows up on almost every rack build I spec — not because it's complicated, but because leaving 3U open in a finished security rack is the kind of detail that comes back to bite you. At 0.08 inches deep, this panel sits dead flush with the rack face, so you get a clean front without anything protruding into the cable management zone alongside it.

Technical Highlights:

• 5.25 in / 3U Height: Covers a three-unit gap in a single panel — the most common leftover gap size when you've populated NVRs, patch panels, UPS units, and a managed switch in a mid-size rack. Ordering one FEB3 typically finishes the job rather than stacking multiple 1U blanks.
• Steel + Powder Coat: Unlike plastic blanks, a steel panel won't flex or crack when a cable bundle rests against it or when you're swapping adjacent gear. The powder coat is durable enough that the rack looks the same five years later as it did on day one of the installation.
• Dual Mounting Points: Two-point attachment prevents the panel from rocking or rattling — worth noting in wall-mount rack deployments, transit cases, or any mobile application where the enclosure sees vibration.

Deployment Considerations:

• The FEB3 is sold as a single panel. On a rack build with multiple open gaps, tally your open U count before ordering — a 6U gap needs two FEB3 panels, not one, since this model covers exactly 3U.
• Mounting hardware (rack screws) is not included and must come from your rack's accessory kit or a separate order. Verify whether your rack rails are tapped for 10-32 or 12-24 before the installation date.

For security operations center builds and surveillance equipment rooms where the rack is visible to end-user staff, the FEB3's flat black finish keeps the installation looking intentional. It's the right finishing panel for any 3U gap in a 19-inch enclosure where appearance and airflow management both matter.