Middle Atlantic Lockbox Storage Unit 4 Spaces 9IN. D - LBX-4

Middle Atlantic LBX-4 4U Rack-Mount Lockbox Storage Unit

Overview

The Middle Atlantic LBX-4 is a 4-rack-unit lockbox designed for integrators who need a lockable, physically protected storage bay inside a standard 19-inch rack. At 9 inches deep and with a UL-rated 50-pound load capacity, it handles real-world equipment loads without flexing — useful when you're securing small NVRs, media converters, power distribution modules, or other gear that needs to stay behind a locked panel in a shared-access rack. The LBX-4 occupies 4U of rack space (7 inches of vertical height), which is a meaningful commitment in a dense rack, but gives you a genuinely usable interior cavity rather than a shallow cosmetic cover.

Middle Atlantic is a well-established name in the rack systems and enclosures space, and the LBX-4 fits their standard rackmount product line — compatible with any EIA-standard 19-inch rack rail configuration. If you're specifying a rack for a security or AV installation where certain components need physical access control separate from the main rack door, this unit is worth evaluating alongside your NVR and recording equipment selection.

Key Features

• 4U / 7-Inch Height: At 4 rack units tall, the LBX-4 provides enough vertical space to house small form-factor devices — a compact NVR, a managed PoE switch, or a UPS battery module — while fitting within standard 19-inch EIA rack rails without modification. Four rack units is a measurable commitment, so plan your rack layout before ordering.
• 9-Inch Depth: The 9-inch interior depth accommodates shallow-to-mid-depth equipment. This isn't suited for full-depth servers or deep UPS units, but for the lockbox use case — securing smaller components in a shared rack — it handles most access-control panels, media converters, and compact recorders. Measure your target device before assuming fit.
• 50-lb UL-Rated Load Capacity: The UL-listed 50-pound load rating means the shelf structure meets a third-party-tested standard, not just a manufacturer claim. For an integrator spec sheet or a facility engineer reviewing your rack design, that UL certification on load capacity carries weight — literally and on paper. Most compact NVRs and switches come in well under this ceiling.
• 19-Inch Standard Width: The LBX-4 mounts to any standard EIA 19-inch rack, which covers the vast majority of commercial rack enclosures deployed in security head-end rooms, IT closets, and rack cabinet installations. No adapter plates or custom mounting required.
• 2 Mounting Points: The unit uses 2 mounting points for rack attachment. In rack configurations with dense equipment adjacent above and below, confirm your rack rail spacing accommodates this before installation — 2-point mounting on a 4U unit is standard for this product class.
• 11.9-lb Shipping Weight: At under 12 pounds shipped, the LBX-4 is straightforward to handle during installation. For overhead rack locations or tight equipment room access, the manageable weight reduces the need for extra installation personnel during positioning and rail-mount.

Integration & Compatibility

The LBX-4 is compatible with standard EIA 19-inch rack systems. It does not require proprietary rails or Middle Atlantic-specific rack enclosures — it installs into any rack that accepts standard rack-mount equipment. For integrators building out complete rack infrastructure for security or AV control rooms, this unit pairs naturally with rack-mount patch panels, PoE switches, and NVRs in the same enclosure.

If your project calls for equipment organization within the rack — cable management, blanking panels, or structured power distribution — plan the lockbox position early in your rack layout. The 4U footprint affects airflow planning for heat-producing components mounted nearby.

Frequently Asked Questions

Q: What rack size does the LBX-4 fit?

A: The LBX-4 is designed for standard EIA 19-inch racks. It occupies 4 rack units (7 inches) of vertical space and uses 2 mounting points for attachment to standard rack rails.

Q: What is the maximum weight the LBX-4 can hold?

A: The LBX-4 has a UL-rated load capacity of 50 pounds (22.7 kg). This is a third-party-tested rating, not a self-declared spec.

Q: How deep is the interior of the LBX-4?

A: The LBX-4 has a 9-inch (22.9 cm) depth. This suits compact and mid-depth devices — measure your equipment before assuming fit, as full-depth servers or deep UPS units will not fit.

Q: Can the LBX-4 be used in any standard rack enclosure?

A: Yes. The LBX-4 mounts to any EIA-compliant 19-inch rack. It does not require a proprietary Middle Atlantic rack enclosure.

Q: Is the LBX-4 (also searched as LBX 4) suitable for housing an NVR?

A: The LBX-4 can house compact NVRs that fit within 9 inches of depth and stay under the 50-pound load limit. Verify the NVR's physical dimensions and weight against these specs before specifying it for this application.

Karl Wilson

The LBX-4's UL-rated 50-pound load capacity is the spec I always check first when a client wants to put anything meaningful inside a lockbox — a lot of enclosures in this category carry self-declared weight ratings that are optimistic at best. The fact that Middle Atlantic has put UL certification behind that number gives you something to point to on a facilities review or a submittal package, which matters on commercial and institutional jobs where the general contractor or owner's rep will ask.

Technical Highlights:

• 50-lb UL Load Rating: Third-party tested, not self-certified — meaningful for submittal documentation on commercial security installations where load ratings are reviewed.
• 4U / 9-inch Depth: Seven inches of vertical clearance and 9 inches of depth provides a practical interior for compact NVRs, access control panels, or media converters without consuming excessive rack real estate.
• 19-Inch EIA Standard Mount: No proprietary hardware — installs into any standard 19-inch rack, which keeps it specifiable across virtually any equipment room or head-end configuration.

Deployment Considerations:

• The 9-inch depth is the binding constraint. Before specifying this for a particular device, pull the device's depth spec and add clearance for cabling — rear cable egress often adds 1–2 inches to what the device datasheet lists as its physical depth.
• Two-point rack mounting on a 4U unit is standard for this class of product, but in racks with heavy vibration environments (near HVAC, elevator shafts), confirm that 2-point attachment meets your facility's requirements. Supplement with a rear support shelf if needed.

The LBX-4 is well-suited for security head-end rooms and IT closets in commercial buildings where shared rack access requires physical segregation of sensitive equipment — access control processors, license key servers, or compact recording hardware that shouldn't be accessible to every technician with a rack key.