Middle Atlantic Slim 5-21 Rear Access PAN - RAP21

Middle Atlantic RAP21 Slim 5 Series 21U Rear Access Panel

Overview

The Middle Atlantic RAP21 is a 21U rear access panel purpose-built for the Middle Atlantic Slim 5 rack series, giving integrators a clean, finished rear closure without sacrificing the ability to service equipment from behind. At 38.4 inches tall and just 1.27 inches deep, it drops into place without eating usable rack depth — a real consideration when you're fitting edge-compute nodes, PoE switches, or AV equipment into a shallow-profile enclosure where every inch counts. The black wrinkle powder coat finish matches the Slim 5 aesthetic and holds up to the handling that comes with AV and security installs.

If you're configuring a rack enclosure build for a server closet, huddle room, or distributed security head-end, this panel rounds out the rear of the cabinet without requiring you to commit to a solid door — useful when airflow management or cable routing needs to remain accessible post-installation.

Key Features

• 21U Form Factor (38.4 in / 97.5 cm tall): Spans the full rear of a standard 21U Slim 5 enclosure. If your rack is populated with 1U switches, patch panels, and NVR appliances, this panel covers the entire rear opening in a single piece — no stacking multiple partial panels, no gaps.
• Minimal Depth Profile (1.27 in / 3.2 cm): In shallow installations — wall-mount closets, in-wall AV racks, security head-ends built into millwork — rear panel depth is a real constraint. At just over an inch of projection, the RAP21 leaves usable interior depth intact and won't conflict with cable management or rear-facing ports.
• 18.95 in Width (48.1 cm): Matches the Slim 5 cabinet width exactly. This isn't a universal panel — it's dimensioned to the Slim 5 chassis, so it fits flush without shimming or field modification.
• Black Wrinkle Powder Coat Finish: The textured powder coat holds up better than smooth paint in environments where the rack sees regular access. It also hides minor scuffs from cable pulls and tool contact — practical in a utility install where the rack lives in a mechanical room or IT closet rather than a showroom.
• Slim 5 Base Series Compatibility: Designed for the Middle Atlantic Slim 5 family of rack accessories and enclosures. If you're already working with Slim 5 side panels, top caps, or doors, the RAP21 integrates without modification. Check your specific Slim 5 model to confirm rear-panel compatibility before ordering.

Integration & Compatibility

The RAP21 is a mechanical accessory — no power, no data connections. Compatibility is determined entirely by physical fit: it is designed for the Middle Atlantic Slim 5 series at 21U. If your enclosure is a different RU count (12U, 16U, etc.) or from a different rack family, this panel will not fit correctly. Verify your rack's model designation before specifying the RAP21.

For integrators building out distributed security or AV infrastructure — NVRs, managed PoE switches, patch panels, power conditioning — the RAP21 lets you close out the rear of the enclosure cleanly while retaining rear serviceability. This matters in deployments where cables are run and terminated after rack assembly, or where equipment needs periodic access for firmware updates or replacement without pulling the entire rack from the wall.

Pair with Middle Atlantic's front door options and side panels from the Slim 5 line to complete the enclosure. The wrinkle powder coat finish is consistent across the Slim 5 accessory family, so the assembled rack presents a uniform appearance.

Frequently Asked Questions

Q: What rack series is the RAP21 compatible with?

A: The RAP21 is designed specifically for the Middle Atlantic Slim 5 rack series. It is dimensioned to fit the Slim 5 rear opening at 21U. It is not a universal panel and will not correctly fit other Middle Atlantic rack families without verification.

Q: How deep is the RAP21, and will it affect usable rack depth?

A: The RAP21 measures 1.27 inches (3.2 cm) deep. This minimal projection is intentional for the Slim 5's shallow-profile design, leaving interior rack depth largely unaffected for rear-facing ports, cable management, and equipment clearance.

Q: What are the overall dimensions of the RAP21?

A: The RAP21 is 38.4 inches (97.5 cm) tall, 18.95 inches (48.1 cm) wide, and 1.27 inches (3.2 cm) deep. It spans 21 rack units.

Q: What finish does the RAP21 have, and does it match other Slim 5 components?

A: The RAP21 has a black wrinkle powder coat finish. This is consistent with the Middle Atlantic Slim 5 accessory line, so it will match side panels, doors, and other Slim 5 components for a uniform rack appearance.

Q: Does the RAP21 require any tools or modifications to install?

A: The RAP21 is a mechanical panel designed to mount to the rear of a Slim 5 enclosure. No electrical connections are required. Installation hardware specifics are not detailed in available evidence — consult Middle Atlantic's installation guide for the Slim 5 series for fastener details.

Ted Perry

The RAP21 does one job: close out the 21U rear opening of a Slim 5 enclosure at a 1.27-inch depth that keeps the panel from fighting with your cabling or rear-facing hardware. In my experience, integrators underspec the rear panel and end up field-cutting generic blanks or leaving the rear open entirely — neither is a good look on a finished install, and an open rear in a shared telecom room is a dust and access concern within months.

Technical Highlights:

• 1.27 in (3.2 cm) Depth: Shallow enough to be a non-issue in tight wall-mount or in-wall rack installations where rear clearance is constrained by the rough-in box or wall cavity.
• 38.4 in Height / 21U Span: Single-piece rear coverage for a fully populated 21U Slim 5 — no field assembly, no partial panel stacking, and no alignment headaches.
• Black Wrinkle Powder Coat: More resistant to contact scuffs than smooth powder coat; in utility installs where the rack gets touched regularly, the texture hides wear that would be obvious on a glossy surface.

Deployment Considerations:

• Confirm your Slim 5 enclosure is the 21U variant before ordering — the RAP21 is dimensioned to 18.95 in wide and 38.4 in tall and will not fit 12U, 16U, or other RU configurations in the Slim 5 family.
• The RAP21 is a passive panel — no provisions for fans, blanks, or cable pass-throughs are documented in the evidence. If your deployment requires active rear ventilation or structured cable egress, evaluate Middle Atlantic's vented or louvered rear door options instead.

The RAP21 is the right spec for finished security head-end closets and AV equipment rooms where the Slim 5 is already the platform of record and a clean, serviceable rear closure is part of the installation standard — not an afterthought.