Middle Atlantic SB1

Middle Atlantic SB1 1U Blank Rack Panel for 19-Inch Racks

Overview

The Middle Atlantic SB1 is a 1U blank rack panel designed to fill unused rack unit space in standard 19-inch equipment enclosures. At just 0.52 inches deep and built from steel with a textured black powder coat finish, the SB1 handles the unglamorous but operationally important task of closing off open rack slots — blocking airflow bypass, keeping cable runs clean, and presenting a finished appearance in enterprise and commercial installations. If you manage rack-dense environments like security head-end rooms, IDF closets, or surveillance NVR cabinets, the SB1 is the fill panel you reach for when a slot opens up between equipment refreshes.

For integrators building out Middle Atlantic rack systems, having a stock of SB1 panels on hand is standard practice — open bays in a populated rack are both an airflow and a cable management problem waiting to happen.

Key Features

• 1U Form Factor (1.75 in tall): Fills a single rack unit gap precisely. One open slot in a densely packed rack can disrupt front-to-back airflow and pull warm exhaust air back toward intake — closing it with the SB1 maintains the thermal management your active gear depends on.
• Standard 19-Inch Panel Width: At exactly 19 inches wide, the SB1 seats flush in any EIA-standard rack enclosure without shimming or modification. The 19-inch standard covers the overwhelming majority of commercial security and AV equipment racks.
• Minimal Depth (0.52 in / 1.3 cm): The panel extends less than an inch into the rack bay, which matters in shallow-depth wall-mount enclosures where every fraction of clearance behind panels counts. This is not a panel that fights for depth with cable managers or patch panels mounted directly behind it.
• Steel Construction: Unlike plastic blanks, steel holds up to repeated rack reconfigurations without warping or cracking. In active deployments where panels get pulled and reinstalled during equipment swaps, material durability is a real factor — flimsy plastic blanks become waste after a few installs.
• Textured Black Powder Coat Finish: Matches the standard finish on Middle Atlantic rack products and most third-party steel enclosures. The texture reduces glare from indicator lights in dark equipment rooms and resists fingerprint visibility during customer walk-throughs and inspections.
• Flanged Style with 2 Mounting Points: The flanged design uses two standard rack-screw mounting points — one on each side — consistent with EIA-310 rack screw spacing. It installs in seconds with the same hardware already in use elsewhere in the rack, no special fasteners required.
• Ships as Single Unit: Packaged and sold individually (Package Count: 1), so you can order exactly the quantity needed for a specific job without taking on excess inventory. Order multiples for rack build-outs or keep a few on hand for field service calls.

Integration & Compatibility

The SB1 is compatible with any standard 19-inch EIA-310 equipment rack — including open-frame, enclosed, and wall-mount enclosures from Middle Atlantic and other manufacturers. The 1U height and standard flange mounting make it a universal fill solution for rack infrastructure in surveillance head-end rooms, server closets, and AV equipment bays. No tools beyond a standard Phillips or cage-nut driver are required for installation.

When planning a rack build, a rack planning guide can help you calculate blank panel quantities alongside active gear to ensure proper airflow management from the start.

What's in the Box

• 1x Middle Atlantic SB1 1U Blank Rack Panel

Frequently Asked Questions

Q: What rack standard does the SB1 fit?

A: The SB1 is sized for standard 19-inch EIA-310 equipment racks. The panel width is 19 inches (48.3 cm) and height is 1.75 inches (1U / 4.4 cm), fitting any standard 1U slot in a 19-inch enclosure.

Q: How deep does the SB1 extend into the rack bay?

A: The SB1 extends only 0.52 inches (1.3 cm) into the rack bay. This minimal depth makes it suitable even for shallow wall-mount enclosures where rear clearance is limited.

Q: What material and finish does the SB1 use?

A: The SB1 is constructed from steel with a textured black powder coat finish. Steel provides durability through repeated installation and removal cycles, and the textured black finish matches standard Middle Atlantic rack product aesthetics.

Q: How many rack screws does the SB1 require to mount?

A: The SB1 uses 2 mounting points — one flange on each side — consistent with standard EIA rack screw spacing. It installs with the same cage nuts or rack screws already in use on other equipment in the rack.

Q: Is the SB1 sold individually or in a multi-pack?

A: The SB1 is sold as a single panel (Package Count: 1). Order the quantity you need for your rack build or field service stock without committing to a bulk pack.

Q: Why use a steel blank panel instead of a plastic one?

A: Steel holds its shape and threading through multiple install/remove cycles. Plastic blank panels can crack at the mounting tabs after a few reconfigurations, which is a real issue in active equipment rooms where racks get reconfigured during equipment swaps or upgrades.

Ted Perry

The Middle Atlantic SB1 is one of those components I specifically call out on every rack build scope — not because it's complex, but because overlooking blank panels costs you on airflow and professional appearance at the same time. At 0.52 inches deep and 1.75 inches tall, the SB1 drops into any open 1U slot in a 19-inch rack and closes it off cleanly with two flange mounting points. Simple, but the steel construction is the part that matters in service-heavy environments.

Technical Highlights:

• 0.52-Inch Depth: Extends less than an inch behind the rack face — critical in wall-mount enclosures where the gap between the panel rear and internal cable managers can be measured in fractions of an inch. Shallower than most alternatives in this form factor.
• Steel with Textured Powder Coat: Resists deformation at the mounting flanges through repeated removal cycles — a real durability advantage over plastic blanks in racks that get reconfigured quarterly during camera or NVR upgrades.
• 2-Point Flange Mount: Uses standard EIA rack screw positions on both sides, no special hardware. Installs in under a minute alongside any Middle Atlantic or third-party 19-inch enclosure already in the field.

Deployment Considerations:

• Order SB1 panels in the same PO as active rack gear — it's easy to forget blank panels until you're on-site with open bays and a customer expecting a finished install. Shipping weight is only 0.8 lbs, so adding a handful to any order adds negligible freight cost.
• The SB1 covers exactly 1U. If you have a 2U or 3U gap, you'll need multiple units — there is no multi-U variant implied by the evidence, so plan panel counts per-slot during the rack layout phase.

For surveillance head-end rooms and IDF closets where racks are populated incrementally as camera counts grow, keeping a stock of SB1 panels on hand means every phase of the installation looks complete and thermally sound from day one — not just after the final equipment is commissioned.